bluuebunny/crossref_metadata_2025 huggingface dataset:
Lamination of Green Ceramic Tapes in the Manufacturing of Multilayer Ceramic Devices
Authors: Wang Shao Hong , Zhou Dan , Hou Zhao Xia , Wang Mei Han , Hu Xiao Dan
Published: March 2013

Lamination of green ceramic tapes is one of the most important technological processes in the manufacturing of multilayer ceramic devices and it has determined influence on the quality of the devices. Therefore, choosing proper lamination technique is very important to a designed structure. The development of lamination techniques of green ceramic tapes is of great significance for the electronic communication industry and it has become a hot spot in the research. In this paper, the main lamination techniques in the present research and practice are overviewed. As to the development prospect and direction of the lamination of green ceramic tapes, the own opinions are given on the basis of lamination study in recent years.
Effects of Void on Physical Properties of Hygrothermal Conditioned CFRP
Authors: Zhang A Ying , Zhang Dong Xing
Published: March 2013

The effects of voids and the environment conditions on the curing degree and the Barcol hardness of CFRP laminates were discussed in this paper. The curing degree increased with increasing immersion time. The porosity had the negative effects on the curing degree of the specimens at the same immersion time. The Barcol hardness decreased with increasing immersion time. The porosity had no obvious effects on the Barcol hardness of the specimens at the same immersion time. The curing degree increased in the hygrothermally conditions. The effect of the environment conditions on the Barcol hardness is obvious. The Barcol hardness of the aged was lower than that of the non-aged specimens in the case of similar porosity.
Graft Copolymeriztion of Glycidyl Methacrylate/Styrene onto Polypropylene in Solid State
Authors: Rui Ying Yu , Chen Sai Sai , Yin Wen Qing , Qi Wen Ying , Wu Xiao Rong , Yu Cheng Bing
Published: March 2013

Radical grafting of glycidyl methacrylate (GMA) onto polypropylene (PP) powder was studied in this research. The reaction temperature was below the melting point of PP so that the reaction was carried out in solid state. Styrene (St) acting as electron donor compounds was used as grafting comonomer and xylene was used as interfacial agent to swell the PP powder. The effects of monomer and comonomer concentration on the graft degree were investigated. The FT-IR spectra of the grafted PP demonstrated that GMA and St were grafted onto PP backbone successfully and the polarization optical micrographs showed that the grafted chains acted as nucleating agent and speeded up the crystallization process.
Maleic Anhydride Grafted Polymers Toughening and Flame Retardant Polystyrene Study on Modification
Authors: Zang Chong Guang , Cao Xian Peng , Zhang Ji Chuan
Published: March 2013

This study showed the effect of Decabromodiphenylethane (DBDPE) - Sb2O3、Tetramomobisphenol A (BDDP) - Sb2O3 and Mg(OH)2 to the mechanical and retardant performance. To eliminate the bad influence of flame retardant agents to materials’ mechanical performance, SEBS-g-MAH and ABS-g-MAH were added into HIPS to toughen HIPS. The experimental results showed that Decabromodiphenylethane (DBDPE) - Sb2O3 had the best effect of flame retardant, and had little influence on the mechanical performance of HIPS. SEBS-g-MAH could improve the impact strength of HIPS greatly and had little influence on other performance.
Study on Soybean Polypeptide Refining Process
Authors: Ma Yong Sheng , Wang Lin Tong , Sun Xian Hui , Li Liu Ying , Sun Jie , Song Rong Qi
Published: March 2013

Soybean polypeptide mixture was decolorized by adopting activated carbon adsorption decolourization process. Anion/cation exchange process was used in the desalination processing of soybean polypeptide. It was showed that excellent decolorizing and desalting effect to soybean peptide solution was gained in the decolourization and desalination process adopted in this experiment. Optimal dosage of activated carbon was 1.2% solution amount (w/w). After decolorizing soybean polypeptide solution color was yellow. Proportion of anion resin and cation resin of ion exchange resin was 2:3(V/V). The volume of solution processed was 5 times as the volume of anion exchange resin. After desalination processing, ash content of soybean peptide solution reduced to 2.11% (dry basis), salinity decreased by 86%, on the other hand taste of soybean polypeptide was lite.
Preparation, Characterization of Substituted Aromatic Heterocyclic Phosphate Salts and the Application in Isotactic Polypropylene
Authors: Long Li Juan , He Wen Tao , Zhang Min Min , Zhang Kai , He Min , Qin Shu Hao , Yu Jie
Published: March 2013

Substituted aromatic heterocyclic phosphate salts were synthesized by a new method and characterized by fourier transform infrared spectroscopy(FT-IR) and thermogravimetry (TG) method. The characteristic absorption bands ascribed to the stretching vibration of P=O group and P-O group verify the successful synthesis of substituted aromatic heterocyclic phosphate salts. When compared with sodium salt, the thermal stability of other salts declines. Their nucleation effects on isotactic polypropylene(iPP) were investigated with differential scanning calorimeter(DSC) and influences on mechanical, optical properties of iPP were also studied. The DSC result shows that with 0.15wt% nucleating agents incorporated into iPP, monovalent salts have a good performance, bivalent salts have less nucleation effect on the crystallization temperature. But the mass fraction of crystallinity of iPP with manganese salt could be increased by 5.2% even it has a weak ability relatively on crystallization temperature. And the mechanical and optical properties of iPP with manganese salt almost reach to iPP containing lithium salt. The results demonstrate that bivalent manganses salt is a kind of new effective nucleating agent when designing compound nucleating agents.
Construction of Dendritic-Linear Brushes on Silica Nanoparticles by Electrostatic Assembly
Authors: Shi Bo , Liang Liang , Lin Bo , Qi Min Hua
Published: March 2013

Using dendritic bromide poly (benzyl ether), G2-Br, as macroinitiator, dendritic-linear polymer (G2-PS-NHSO3Na) was obtained via atom transfer radical polymerization and nucleophilic substitution of G2-PS-Br. G2-PS-NHSO3Na was constructed on cationic silica by both electrostatic attraction and steric effort coming from dendritic block of G2-PS-NHSO3Na. 1H-NMR and differential scanning calorimetry were used to characterize the structure and thermal behavior of G2-PS-NHSO3Na; thermo-gravimetric analysis and TEM were applied to analysis the assembly amount of G2-PS-NHSO3Na and the dispersibility of silica before and after assembly. The results show that G2-PS-NHSO3Na can be synthesized successfully and has exact structure; it can be constructed on cationic silica with 27% assembly amount; the aggregation of silica can be prevented effectively by the dendritic-linear brushes, but the molecular weight of linear segment and the generation of dendritic block will influence the assembly behavior and the amount of the dendritic-linear brushes.
Nonisothermal Crystallization Kinetics of Isotactic Polypropylene Filled with a Novel Nucleating Agent
Authors: Xu Nai , Pan Li Sha , Pang Su Juan , Lin Qiang
Published: March 2013

The nonisothermal crystallization kinetics of isotactic polypropylene (iPP) filled with a novel nucleating agent (TMC328) was studied by using differential scanning calorimetric. The commonly used Arami, Ozawa, and Mo models were used to model the crystallization kinetics, and it appears that Arami and Mo models can well describe the nonisothermal crystallization behaviors of iPP/TMC328 blends. The results indicate that a small amount of TMC328 can obviously enhance the kinetic crystallizability of iPP due to its heterogeneous nucleation effect.
Effects of Delaminations on Vibration Characteristic for HT3/5224 Carbon Fiber Reinforced Laminated Plate
Authors: Liang Wei , Liu Yu Feng , Yang Nai Bin
Published: March 2013

Delaminating of composite is one of keys for composite structures. An energy method was used to analyze the fundamental frequency of HT3/5224 carbon fiber reinforced laminated plate in this paper. Different delaminated situations are considered in analysis on vibration of composite based on Kirchhoff theory. The results show that delaminations have a great influence on the fundamental frequency of laminated plate. The discussion shows inner delaminations have more influence on composite laminates than surface delaminations. Different kinds of delaminations can interact each other and the interaction can increase the influence on frequency.
Two-Photon Absorption Properties of s-Triazine Derivatives With Near Octupolar Symmetry
Authors: Cui Yue Zhi , Zhang Yang , Zhou Long Long , Yu Fang
Published: March 2013

Two new three-branched s-triazine derivatives with near-octupolar symmetry have been synthesized. In each of them, two branches have donor groups attaching to their ends, while the other one has none. Their photophysical characteristics, such as UV–vis spectra, fluorescence spectra and two-photon excited fluorescence spectra, are compared with their octuplar analogs in which all the three branches are ended by donor group. The little structural difference results in great decline of single-photon absorptivity and single-photon excited fluorescence, as well as the two-photon excitated fluorescence.
Fluorescence and Energy Transfer in Er3+/ Nd3+ Co-Doped Oxyﬂuoride Tellurite Glass
Authors: Hou Zhao Xia , Xue Zhao Lu , Wang Shao Hong , Wang Mei Han , Hu Xiao Dan
Published: March 2013

Er3+/Nd3+ co-doped oxyﬂuoride tellurite glass was prepared successfully by the conventional melting method. Luminescent properties of Er3+/Nd3+ co-doped oxyﬂuoride tellurite glass were studied in the NIR spectral range. There existed strong absorption peaks of Nd3+ ions at 580 nm, 743 nm, 800 nm and 874 nm and obvious absorption peaks of Er3+ ions at 580 nm, 743 nm, 800 nm and 874 nm. Er 3+ /Nd 3+ co-doped glass performed excellent fluorescence properties at 1.53 μm and 1.06 μm. There existed energy transfer between Nd3+ ions and Er3+ ions, that is 4I9/2 (Er 3+ ) + 4I9/2 (Nd3+) → 4I15/2 (Er3+) + 4F5/2 (Nd3+). Owing to the energy transfer from Er3+ ions to Nd3+ ions, multi-phonon relaxation or up-conversion radiations, emission intenisty of Er3+/ Nd3+ co-doped glass was weaker than that of Er3+ single-doped glass at 1.53 μm.
Hollow Spherical CaMoO4:Eu3+, Li+ Phosphors Prepared by Spray Pyrolysis
Authors: Wang Xia , Liu Chang Cheng , Liang Zhen Hua , Peng Gui Hua , Han Xiao Bao
Published: March 2013

Hollow spherical CaMoO4:Eu3+, Li+ red phosphors have been successfully synthesized by spray pyrolysis method. The crystalline phase, morphology and luminescent properties of the obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence emission spectra (PL). The XRD results demonstrated that all the diffraction peaks of the samples can be well indexed to the tetragonal phase of CaMoO4. The SEM images showed that the particles were composed of hollow spheres, whose diameters are about 1.4 μm. The as-prepared CaMoO4:Eu3+, Li+ hollow spheres show a strong red emission corresponding to the 5D0-7F2 transition of the Eu3+ ions under ultraviolet light.
Preparation and Characterization of SrAl2O4:Eu2+ by Microwave - Combustion Method
Authors: Yu Hai Lian
Published: March 2013

SrAl2O4:Eu2+ was prepared by microwave-combustion method with europium oxide, strontium nitrate and aluminium nitrate as reaction materials under urea solution as reaction medium. The products were characterized by several analytical methods. Fourier transform infrared spectroscopy was used to determine whether the product was SrAl2O4:Eu2+. X-ray technique was used to study the phase composition. Scanning electron microscopy was used to study micro-structure and surface morphology of powders. X-ray fluorescence spectrometer was used to study the content and impurity of the product. The results show that the prepared SrAl2O4:Eu2+ luminescent materials belong to monoclinic crystal structure, the prepared SrAl2O4:Eu2+ presents loose, porous and foamy micro-structure and surface morphology. The product is made of SrAl2O4:Eu2+ mainly, which concludes W, P, Ni, Fe and Ca elements.
Study of Structural and Electrical Transport Properties of Polycrystalline La1-XCaXMnO3 (x=0.33, 0.5 and 0.9) Prepared by a Co-Precipitation Method
Authors: Theingi Mya , Ma Ji , Zhang Hui , Gao Xiang , Yi Jian Hong , Chen Qing Ming
Published: March 2013

Manganite perovskite La1-xCaxMnO3 (x=0.33, 0.5 and 0.9) have been prepared by chemical co-precipitation method. Ammonium carbonate was used to coprecipitate lanthanum, calcium and manganese ions as carbonates under basic condition. This precursor on calcining at 900°C yields La-Ca-Mn-O perovskite phase. Follow by sintering at 1200°C after the powders were pressed into pellets gave La1-xCaxMnO3 (LCMO) polycrystalline ceramics. The crystal phases of the resulting powders and ceramics were examined by X-ray diffraction (XRD) technique. The morphology of the powders was observed by scanning electron microscopy (SEM) and electrical transport properties of ceramics were measured by conventional four-point probe technique.
An Oxide-Diluted Magnetic Semiconductor: Co-Doped ZnO
Authors: Li Tong , Jie Qiong , Zhang Yu , Wang Ya Xin , Ni Xiao Chang
Published: March 2013

The discovery of ferromagnetism (FM) in wide band-gap semiconductors doped with transition metals (TM), known as diluted magnetic semiconductors (DMSs), has attracted much interest. These materials are applicable to spin-based optoelectronic devices working at room temperature (RT). Among DMSs, the system of Co-doped ZnO is considered as the most promising candidate, which was expected to robust magnetism. This paper focuses primarily on the recent progress in the experimental studies of ZnO:Co DMSs. The magnetic properties and possible mechanism of ZnO:Co DMSs prepared by different methods are summarized and reviewed.
First-Principles Calculation of Electronic Structure of the Cu–Doped Pyrite FeS2
Authors: Fan Jian Ling , Lu Sen Kai
Published: March 2013

Structure stability and electronic properties of Cu-doped FeS2 were studied using the first principle calculations based on plane wave pseudo-potential theory. The calculated results revealed that the band-gap Eg of Cu-doped FeS2 was 0.47 eV. The valence band of the density of state (DOS) was mostly due to the Cu 3d and S p orbitals. The bottom part of conduction band was mostly due to the Fe 3d orbitals. The calculated covalent character of the Fe–S bonds gave large delocalization of the spin resulting in smaller values. The Cu, Fe and S had the spin compensated leading to configuration s0.47 p0.61d9.78, Fe s0.27p0.58d7.03, S s1.83p4.23, respectively. The tetrahedral environment of the Fe and Cu and the relatively weak field of the S2− ligand were consistent to the Fe3+ and Cu+.
Optical Properties and Defect Study of Ca2+ Co-Doping Lu2Si2O7:Ce3+ Single Crystal Scintillator
Authors: Feng He , Ren Guo Hao , Ding Dong Zhou , Li Huan Ying , Lei Fang
Published: March 2013

Single crystal of Lu2Si2O7 (LPS):0.5%Ce,0.1%Ca was grown by the Czochralski method. The X-ray excited luminescence (XEL), photoluminescence excitation (PLE), photoluminescence (PL) and transmittance spectra were measured and discussed. The as grown LPS:Ce,Ca sample presents excellent optical quality with 81% transmittance. Two absorption peaks locate at 300 and 350 nm, corresponding to the electron transition of Ce3+ from 4f ground to 5d1 and 5d2 respectively. According to the Gaussian fitting, the XEL curve of LPS:Ce,Ca can be fitted into two peaks centering at 378 and 407 nm respectively. It is found that the addition of Ca2+ in LPS:Ce introduces more oxygen vacancies, leading to the decreases of the luminescence efficiency of LPS:Ce. Through the thermally stimulated luminescence (TSL) measurement, two kinds of charge trap are found in LPS:Ce,Ca, whose energy depths are 1.20 and 1.47 eV. The trap at 1.20 eV is intrinsic electron trap induced by Ce3+ doping in LPS host and the other trap is formed by the both impact of and defects.
Preparation of CsI(Tl) Scintillation Film by RF Magnetron Sputter Method and its Structural and Optical Characterization
Authors: Feng He , Chen Cheng Long , Chou Mitch , Ren Guo Hao , Xu Jia Yue
Published: March 2013

Thallium-doped cesium iodide CsI(Tl) scintillation film has been manufactured by radio frequency (RF) magnetron sputter method onto the quartz glass substrates. The X-ray diffraction (XRD) pattern of the film shows preferable growth of the crystalline film in the (200) orientation. The optical and scintillation properties of CsI(Tl) film were investigated, including photoluminescence excitation (PLE), photoluminescence (PL), X-ray excited luminescence (XEL) spectra and decay curve. The main emission peak at about 2.28 eV is related to the radiative relaxation from the strong-off configuration of localized excitons around Tl+ ions. Under UV excitation, the 2.28 eV emission of CsI(Tl) film presents a single exponential decay with 545 ns.
Study on Y3Al5O12:Eu3+ Phosphor Coated by Bi2O3
Authors: Zhang Xia , Wang Sai , Jiao Bao Xiang , Wang Xu
Published: March 2013

In this work, Y3Al5O12:Eu3+ phosphors were coated with Bi2O3 by the coprecipitation method. The crystal structure and surface morphology were characterized by XRD, Zeta potential and IR, respectively. The results showed that the surface of Y3Al5O12:Eu3+ phosphors were evenly coated with Bi2O3 by the electrostatic attraction, i.e. after surface treatment, the crystal structure of Y3Al5O12:Eu3+ phosphors remained the same as that of the uncoated samples. The results demonstrated that the luminous intensity of coated Y3Al5O12:Eu3+ phosphors with 5wt% Bi2O3 attained the maximun value, increasing to 1.17 times that of uncoated Y3Al5O12:Eu3+ phosphors.
Microstructure and Wear Properties of In Situ Production of (Fe,Cr)7C3 Particulate Bundles Reinforced Iron Matrix Composites
Authors: Tian Jing Lai , Ye Fang Xia , Zhong Li Sheng , Xu Yun Hua
Published: March 2013

In-situ production of (Fe,Cr)7C3 particulate bundles-reinforced iron matrix composites were prepared by infiltration casting between Cr wires and white cast iron at 1200°C plus subsequent heat treatment. The composites prepared under different heat treatment time were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), macrohardness test and pin-on-disc wear resistance test. The results show that the composite is mainly consist of (Fe,Cr)7C3 carbides and γ-Fe. The area of the particulate bundles gradually increases with the increase of heat treatment time, the microstructure evolved from eutectic to hypoeutectic, and the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics, respectively. The (Fe,Cr)7C3 particulate bundles reinforced composite has high macrohardness and excellent wear resistance under dry sliding wear testing conditons.
The Growth and Optical Properties of CdS Nanorods via Solvent-Thermal Route
Authors: Duan Jun Hong , Xu Zhen Ya , Feng Hao
Published: March 2013

CdS nanocrystals were synthesized by a solvent-thermal method in ethylenediamine at different temperature and time. The samples were investigated by XRD, TEM, Uv-vis absorption and PL spectroscopy. The solvent-thermal temperature at 200 °C is an optimal reaction temperature for preparing CdS nanorods with high crystallinity. The PL spectra exhibited two typical emissions: near band edge emission (centered at ~520nm) and defect emission (a broad peak in the range of 550-750nm). The defect emission decreased gradually and disappeared finally with the reaction time increasing from 1 to 12h, but the near band edge emission increased. This revealed that the quality of the CdS samples improved by degrees as the reaction time increased. The growth of single-crystalline CdS nanorods followed three steps; (a) CdS nuclei formed by reacting Cadmium chloride dihydrate and thiourea in ethylenediamine at 200 °C, (b) CdS nuclei grew into thin nanowhiskers after 1h reaction, (c) the growth of CdS nanorods based on nanowhiskers via a Ostwald ripening process.
Catalytic Dehydrogenation Reaction Activity of Cyclohexanol over Cu2O/Mg(OH)2 Catalysts
Authors: Wang Yuan Qiang , Wang Dan Dan , Liu Meng Nan
Published: March 2013

A series of supported Cu2O catalysts on Mg(OH)2 or γ-Al2O3 were prepared by coprecipitation-chemical reduction combined with impregnation using Cu(NO3)2 as precursor salt and hydrazine hydrate as the reducing agent. The crystal phase characteristics and specific suface area of the samples have been characterized by means of X-ray powder diffraction (XRD) and BET method. Catalytic dehydrogenation reaction activity of cyclohexanol over the catalysts was investigated. Results showed Cu2O is the main active component over the supported catalysts. Cu2O Grain has good dispersion in nanoscale. Acid or alkali type of the support has great influence on cyclohexanol dehydrogenation activity of supported Cu2O catalysts. There have cyclohaxene and cyclohexanone products over the supported catalysts. The reaction activity of Cu2O/ Mg(OH)2 catalysts changed with hydrazine hydrate volume. Cyclohexanol conversion and cyclohexanone selectivity can reach to 97.2% and 71.2%.
Selective Distribution of Carbon Black in Epoxy Resin/Thermoplastic Multiphase Composites
Authors: Shi Rui , Ma Chuan Guo , Liu Ming
Published: March 2013

Selective dispersion of carbon black (CB) in three kinds of epoxy resin (EP)/ thermoplastic multiphase conductive polymer composites were investigated. The thermoplastics involved polystyrene (PS), polyethersulfone (PES) and polyetherimide (PEI). The results showed that the selective location of CB particles are mainly controlled by thermodynamics as indicated by consistency of wetting coefficient prediction and real microstructure. For CB/EP/PS, with co-continuous phase structure, CB particles are not selectively located in one polymer but located in both EP-rich phase and PS-rich phase. For CB/EP/PES, with not perfect inverted phase structure, CB particles are selectively located in PES-rich phase. For CB/EP/PEI, with perfect inverted phase structure, CB particles are selectively located in PEI-rich phase.
Synthesis and Evaluation of a New Type of Cationic Gemini Surfactant
Authors: Liu Qing Wang , Zhu Yun Hai , Han Guang Zhi , Fan Zhen Zhong , Wang Ji Gang , Du Quan Qing
Published: March 2013

A cationic Gemini surfactant ethane-1, 2-bis (Cetyl dimethyl brominated ammonium), denoted 16-2-16 was synthesized from ethane and Hexadecyl dimethyl amine. The properties of the product were characterized, and the physical and chemical properties were determined. The results showed that the synthetic product was the target product, and its surface tension was 3.4×10-4N/m, and the CMC was 2.2×10-4mol/L at 25°C. At the same time, its synergistic effect with common surfactants was studied; the results showed that the synthetic product had good synergic effect.
Preparation of Three-Dimensionally Interconnected Meso/Mesoporous Ho3+ Doped TiO2 Nanoparticles with Enhanced Photocatalytic Activity
Authors: Yin Wei
Published: March 2013

Three-dimensionally interconnected meso/mesoporous holmium doped titania nanoparticles had been successfully prepared by a sol-gel routine. The precursors were prepared by cohydrolysis reactions of Ti(OC2H5)4/Ho(OC2H5)6 coprecipitating around micells of cetyltrimethylammonium bromide processed by ultrasonic. The hierarchical meso/mesoporous material was proved by high resolution transmission electron microscopy and N2 adsorption-desorption analysis. The results of selecting area electron diffraction pattern, Raman spectroscopy, and X-ray diffractometry in wide-angle range showed a crystal phase of anatase for the prepared material. The XPS spectroscopy analysis showed that Ti element exists in the Ti4+ form and the bonds of Ti-O-Ho/H and Ti-O-Ti exist in the surface of Ho3+ doped TiO2. Phenol photodegradation in an aqueous medium was employed as a probe reaction to evaluate the photocatalytic reactivity of the catalyst. The catalyst which possessed a hierarchical meso/mesoporous structure being conducive mass-transferring and light-harvesting showed that a photocatalytic activity for phenol is about 3.3 times than that of commercial P25 titania under a very weak UV-Vis irradiation condition.
Synthesis and Properties of Flame-Retardant Waterborne Emulsion Derived from O-Cresol Formaldehyde Epoxy Resin
Authors: Wei Jian Xiong , Xu Gui Long , Hu Jian , Yang Jin
Published: March 2013

By modifying O-cresol Formaldehyde epoxy resin with DOPO and Diethanolamine, and then neutralized by acetic acid, phosphorous-containing epoxy emulsion with excellent flame retardancy can be obtained under strong agitation. Diethanolamine opening rate and neutralized degree to the formation of epoxy emulsion were optimized. The flame-retardant property of the cured phosphorous-containing epoxy resin was test by UL-94, LOI and TGA method. The result shows that when the opening rate of Diethanolamine is 25.0% and the neutralized degree is 95.0%, stable epoxy emulsion can be obtained. When phosphorus content of the epoxy resin was 3.0wt%, the LOI value of the resin can be reach to 39.2 and pass the UL-94 test，the 700°C char remaining is 30.0wt%. The result shows that the flame retardant mechanism of the phosphorous-containing epoxy resin is mainly through a condensed- phase mechanism.
Synthesis and Performances of a Fe-Site Doped Lithium Iron Phosphate
Authors: Xie Hui , Liu Jian Zhuang
Published: March 2013

A Fe-site doped lithium phosphate LiFe0.99La0.01PO4 as cathode material for lithium ion battery was synthesized by solid-state reaction. The crystalline structure, morphology of particles and electrochemical performances of the sample were investigated by X-ray diffraction, scanning electron microscopy, charge-discharge test and cyclic voltammetry. The results show that the small LiFe0.99La0.01PO4 particles are simple pure olive-type phase structure with uniformly distribution of gain size. The LiFe0.99La0.01PO4 obtained has proper electrochemical capacity, good cycle ability and rate performances. Such an excellent electrochemical characteristic should be partially related to the enhanced electronic conductivities and probably the better mobility of Li ion in the crystal of the doped sample.
Synthesis, Characterization and Electrochemical Properties of Li1+xMn2O4 Spinels Prepared by Solution Combustion Synthesis
Authors: Li Bin , Chen Mi Mi , Bai Hong Li , Huang Xiang Zhong , Guo Jun Ming
Published: March 2013

Li1+xMn2O4 prepared by solution combustion synthesis method has a strong exothermic peak at 282.1 °C, which is believed that the reaction of LiNO3, LiAc2•2H2O with Mn(NO3)2 and MnAc2•4H2O occurs in this region. So products were calcined at 500 °C would got fine crystalline. Pure phase LiMn2O4 can be prepared with x(Li)=0.16 and 0.24 without impurity. Li-rich samples for x(Li)=0.16 and 0.24 has nanoparticles of which the surface area will be more and can lead to better electrode performance. The initial discharge capacity of Li1.16Mn2O4 was the highest of 116.4mAh•g-1, with a 15 % loss of the initial capacity after 40 cycles, which is much better than bare LiMn2O4. Excess Li+ is beneficial to formation of pure phase of spinel LiMn2O4 and Li1.16Mn2O4 has best electrochemical performance in the method of solution combustion synthesis.
Mechanical Properties and Morphology of Long Glass Fiber Reinforced PP Composites
Authors: Guo Jian Bing , Zhang Kai Zhou , Zhang Dao Hai , Wu Bin , He Min , Qin Shu Hao
Published: March 2013

The effects of polypropylene grafted with maleic anhydride (PP-g-MA) on the interfacial interaction of PP/GF composites were investigated by means of scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), and mechanical properties. The experimental results demonstrate that PP-g-MA could effectively improve interfacial interaction between the PP and LGF. Based on SEM, good interfacial adhesion between PP and LGF in PP/PP-g-MA/LGF（66.5/3.5/30） composites was observed. All results in this paper were consistent, and showed the good interaction between PP and LGF, which were proved by the mechanical properties of the composites.
Oxidation Behavior of a TP304H Stainless Steel in the High Temperature and High Pressure Water Vapor
Authors: Wang Wei , Wang Zhi Wu , Zhong Wan Li , Song Tao , Hu Yang Sen
Published: March 2013

The feature, structure and composition of oxide films of a TP304H steel oxidized under 650°C and 25MPa water vapor for 1~50h were analyzed by SEM, EDS and XRD. The oxidizing dynamic curves were measured by discontinuous weighing method. The results indicated that the oxidation kinetics was agreement with the parabolic law. At the beginning of the oxidation, the formation of oxide was Fe2O3, while Fe3O4 and FeCr2O4 were formed with the increasing of oxidation time, without independent Cr2O3.
Sulfides Precipitation during Transformation of a High Sulfur Alloy Steel
Authors: Lu Xian Zhong , Wu Run , Liu Ping , Wu Hai Tao
Published: March 2013

The morphology of sulfide and abrasive resistance of a high sulfur alloy steel cast at different cooling rate were investigated in this paper. The size, volume fraction and distribution of sulfides was decreased as the solidification rate was increased. After heat treatment, many spherical sulfide were found. Most of sulfides within grains were Cr2MnS4, while sulfides at grain boundaries were mainly FeS. High sulfur alloy steel had strong abrasive resistance.
Development of Domestic Prehardened Plastic Mould Steel
Authors: Luo Yi
Published: March 2013

The classification, properties of the domestic prehardened plastic mould steel are reviewed, the composition design and heat treatment process improvement in the chinese prehardened plastic mould steel are commented, its development direction is pointed out. Quenched and tempered prehardened steel has been developed and upgraded based on foreign steels, while non-quenched and tempered prehardened was invented by ourselves, and has been researching and developing because of its good cost performance ratio.
Study on Antibacterial Properties of SUSXM7 Cu- Bearing Austenitic Stainless Steel
Authors: Zhang Yan Mei , Qin Kang , Du Qing Ping , Huang Jia Qiang , Shuai Ge Guo , Jie Xiao Hua
Published: March 2013

SUSXM7 Cu-bearing austenitic stainless stee1 was conducted with special antibacterial heat treatment and antibacterial properties of the steel were studied. The experimental results show that a suitable amount of ε-Cu phases can precipitate from the matrix of SUSXM7 steel after solution treated at 1100 °C and aging treated at 650 - 850 °C. ε-Cu phases are granular with diameter of 100 - 200 nm. SUSXM7 Cu-bearing austenitic stainless steels possess excellent antibacterial properties. Antibacterial rates against two typical bacteria of Escherichia coli and Staphylococcus aureus surpass 99.0％ and are basically equal to that of Cu-bearing austenitic antibacterial stainless steel researched widely now.
Out-of-Core Incremental Algorithm for 2D Laguerre Diagram and Visualization Technique
Authors: Sheng Jie , Li Jun Chen , Li Xu Dong
Published: March 2013

When design program of 2D Laguerre Diagram using traditional incremental algorithm, the data structures of program is very complex and the secondary development of program is difficult, in addition, it need speed much computer memory. In order to solve the above problems, the scheme of dynamic data-exchange between hard disk data file and memory structural array is designed, which using outside file in hard disk as storage space and using structural body as intermediate variables. During the Laguerre-division against planar circle sets composed of circles have different weighted, program avoids computer memory storage restriction and implements constructing Laguerre cells aggregation effectively in random regions designed by user. Computer memory use invariable in 1MB when program run and the hard disk use is liner with the scale of Laguerre diagram. This research makes further developments towards the incremental out-of-core algorithm for Laguerre diagram. The data that store the information of Laguerre diagram are finally outputted in text file form, which makes it greatly convenient to apply the Laguerre diagram to engineering practices and secondary exploitation. At the same time, visualization module sufficed for user need that demonstrate attribute of Laguerre cells.
Design and Analysis of a Hip Rehabilitation Mechanism
Authors: Zhou Ping , Wang Qiang , Song Li Ping , Zhang Shi De
Published: March 2013

Studying the hip, a new type of parallel mechanism with three branches and 2DOF, 2-PSS/U asymmetric is proposed, which is based on the analysis of structural features of the human lower limb hip joint and the importance of human lower limb. A hip rehabilitation institutions, combined with Parallel Mechanism and electric machinery, is used for rehabilitation training. Calculating the degree of freedom of mechanism, verifying its degree of accuracy by means of screw theory, the Mechanism's forward position is evaluated, velocity analysis is made based on screw theory on the mechanism.
Workspace Analysis and Performance Evaluation of a 6/6 Cable-Suspended Parallel Robot
Authors: Zhou Hui , Cao Yi , Yu Jing Hu , Chen Gui Lan , Wang Qiang , Chen Hai Wei
Published: March 2013

This paper mainly addressed the workspace analysis and performance evaluation of a special class of the 6/6 cable-suspended parallel robot. Based on the screw theory and the static equilibrium, the Jacobian matrix of the cable -suspended parallel robot is constructed. The workspace volume is characterized as the set of points where the centroid of the moving platform can reach with tensions in all suspension cables for a constant orientation. This paper attempts to tackle some aspects of optimal design of this special class of the 6/6 cable-suspended parallel robot by addressing the variations of the workspace volume and the accuracy of the robot using different geometric conﬁgurations, different ratios and orientations of the moving platform. The global condition index is used as a performance index of a robot with respect to the force and velocity transmission over the whole workspace.
Research on the Gyrocompass Dummy Fault Diagnosis System
Authors: Xu Guo Qiang
Published: March 2013

In order to diagnose the faults of the gyrocompass, a dummy fault diagnosis system based on the PC/104 computer is presented. By using such technologies as the blurring nerve network、the fault converse illation, knowledge database and so on, the system’s reliability and flexibility are greatly enhanced. The results show that the relative errors of the data acquisition and parameter simulation are lower than 0.5%, the direct current power is lower than 300W, the veracity of fault isolation is reached to 96%, the alternating current power is lower than 250W.
Study on Computer Simulation for Car Handling Dynamics with 8 DOF
Authors: Zhang Peng , He Le , Liu Xu Tao , Xia Qun Sheng
Published: March 2013

A mathematical model of eight degrees freedom was built up with considering the normal load transfer due to the presence of the longitudinal, lateral acceleration for a vehicle under braking in turn condition. And the simulation model based on the mathematical model was eatablished by means of MATLAB/Simulink software. The comparison between simulation results and real vehicle test results under the snow pavement double-lane change condition is in good agreement. It can be concluded that the 8DOF vehicle dynamics model of this study is acceptable and valid.
Test and Model Identification System of Electromechanical Actuator
Authors: Wei Shuang , Guo Bai Wei , Xu Hong
Published: March 2013

The paper mainly introduced the test and model identification process of electromechanical actuator. For the virtual instrument is convenient in testing and Matlab has powerful calculation function, combined with the two environment ,and a test platform was build to realize the integrated design of testing and model identification, and the simulation result showed that both the testing system and the least square algorithm is effective.
A Treadmill Speed Adaptive Control Method for Lower Limb Rehabilitation Robot
Authors: Wu Jing Wen , Shen Lin Yong , Zhang Ya Nan , Qian Jin Wu
Published: March 2013

Robot-assisted rehabilitation training on a treadmill is a popular research direction in recent years. And it will replace the artificial rehabilitation training to become a major rehabilitation training method for patients with lower limb action impairments. However, in the existing rehabilitation system, treadmill run in the constant speed. It has to change the speed manually rather than adjust according to the patients’ active consciousness. In the paper, we proposed a treadmill speed adaption control method for Lower Limb Rehabilitation Robot. A pull pressure sensor is used to detect human’s movement trends. The data are calculated through non-linear gain and then sent to the speed controller in the treadmill according to the characteristics that the hip of human body is fixed on the robot in the walking direction of the sagittal plane. Based on this principle, we designed a force measurement structure and verified the control method by experiment. The result shows that the control method can satisfy adaptive control of the treadmill speed.
Finite Element Static Stiffness Analysis of the A/C Axes Bi-Rotary Milling Head
Authors: Shi Bo , Huang Mei Fa , Chen Yong , Hu Ru Kai , Yang Wu Jun , Tang Jian Sheng
Published: March 2013

A/C axes bi-rotary milling head is an important functional component in gantry type five-axis CNC machine tool. The static characteristics affect directly the machining accuracy of machine tool. The paper investigates the static stiffness of A/C axes bi-rotary milling head in gantry type five-axis CNC machine tool XK2320-5X developed by a domestic company. Because this product developed depend on the experience of designers, the machining accuracy of A/C axes bi-rotary milling head of primitive XK2320-5X type cannot meet the accuracy requirement under actual working conditions. On the basis of structure design, the static stiffness analysis of the milling head under two working conditions is carried out using finite element method. The deformations of the main mechanical parts in the milling head are obtained. The analysis results indicate that the static stiffness in direction X is the weakest of the milling head and the milling head shell is the most important factor of deformation. The work done provides foundation for further structure design and machining accuracy improvement of A/C axes bi-rotary milling head.
Study on the Influence Factors of Honing Efficiency
Authors: Zhang Yong Gui , Niu Jun Kai , Yang Yun Jiang , Gong Jun
Published: March 2013

According to the requirements of optimization for honing efficiency ,Through Matlab simulation and finite element analysis, this paper studied the influence factors of reticulate pattern quality and honing efficiency. These factors contain honing speed, reversing acceleration, oil-stone. This paper provides certain theoretical basis for reasonable selection of key technological parameters in high efficiency honing process .
Comprehensive Evaluation on Reliability of Machine Tools Based on Extension Method to Determine Membership Degree
Authors: Zhao Hong Wei , He Xin Yuan , Wang Han Wei , Wang He , Yang Zhao Jun , Wang Yin Kai , Zhang Wen Shuang
Published: March 2013

To solve acquired the membership degree in fuzzy evaluation. we use correlation function in extension theory to calculate the degree of association between evaluation indicators and fuzzy scales, and then the degree of association is done standers conversion and normalized processing,, getting the membership value of evaluation matrix in fuzzy comprehensive evaluation. Comprising traditional statistical methods and expert evaluation method, the membership value of evaluation matrix which is gat through correlation function method of extension theory is more simple and reasonable. Comprehensive evaluation value is got from Calculating linear weighted between evaluation matrix and the index weight coming from analytic hierarchy process. Finally, using two type of home made NC machine tools as example to do the practical application study of the proposed method, the results show that this method can give the reasonable evaluation.
Research of NURBS Based Approach for Fitting Contour of Windshield
Authors: Zhou Zi Qiang , Dai Guo Hong , Tan Han Mo
Published: March 2013

For the aim of disassembly and recycle the End-of-life Vehicle (ELV) efficiently and rationally, the scheme of flexible dismantling cell is presented. Especially, how to cut off the windshield of ELV automatically is a key technology among them. The contour of the windshield is detected by a special sensor. And then all the data points will be processed according to the curvature, after that, NURBS based method is used to fitting the contour of the windshield.
An Algorithm for Determining the Nested Relation between Contours of Complex Parts Applied in Laser Cutting
Authors: Wu Shi De , Ma Ze Yu , Yang Jing Feng
Published: March 2013

Designed a method based on the complexity of multiple nested parts to extract and analyze the information of parts. In order to simplify the algorithm and improve the efficiency of the program, a data structure stored all information of entities was presented. The theory of the region method was introduced in this paper, and a specific algorithm was designed to judge the nested relationship between contours by using this theory and entities information. Finally, the computational result can be used to determine the contour cutting order.
Regularity and Convexity of NURBS Curves
Authors: Meng Qing Xian , Meng Hui Hui
Published: March 2013

Determining regularity and convexity of NURBS curves is necessary in computer aided geometric design. In this paper, the problems above are converted to the questions related to polynomials. Then based on properties of algebraic equations and isolation theorem of roots, a simple and practical method for determining those geometric properties of NURBS curves is put forward. Compared with traditional method it will save us much computation
The Research on the Automatic System of Circulating Garage in Stereo Car Parking
Authors: Zhang Jian , Wang Chuan Qi , Wang Wei Rong , Gu Xue Jing
Published: March 2013

Currently, the number of cars in city is dramatically rising; meanwhile, car parking is becoming the serious problem in city. A way to solve this problem is to use the parking space efficiently; therefore, a control system of stable stereo circulating parking garage is introduced in this paper which contained multi-layers and various parking lots. The system adopted PLC as the primary controller. It discussed the structure of the hardware and software of its electrical system, and its control method in detail, in order to provide a new storing solution for stereo parking garage.
Tension Control Strategy in Plastic Film Printing Process
Authors: Sun Peng , Cao Peng
Published: March 2013

The character of the tension control in the plastic-film printing was introduced, and the coiler drive control method was given. The indirect constant tension control method was analyzed, and the key parameters were given, also the method of coil diameter measurement with distance meter, the friction torque in different rotate speed was given by the friction torque test; the method of rotational inertia measurement which influence the dynamic tension was put forward.
The Research and Application of the Karst Slope Irrigation Control System
Authors: Zhang He Xi , Chi Dao Cai , Wang Qun , Wang Yong Tao
Published: March 2013

This article mainly aimed at the Karst slope characteristics, designed a kind of network based on ZigBee irrigation control system. The lower position machine node in this system powered by solar energy, in accordance with the regulation of crop water requirements for irrigation, and synchronously measureed pipe flow of all levels. According to the isosceles triangle(type B)to decorate irrigation points and the diagonal 5 forms to fix the sensor mentioned in this article for crop irrigation experiment, and the pipes flow are measured.
Retractable Conveyor Control System Design Based on PLC
Authors: Cheng Xiao Hui , Wan Jie
Published: March 2013

This paper introduces a design of PLC based intelligent control system for telescopic conveyor.The system is designed closed loop speed control module, electrical energy saving module and automatic alarm module. PLC technology improves equipment centralized control degree, frequency converter improves control accuracy and efficiency. These can embody the automation design, energy-saving design and safety design concept.
Application of Speed Observer for XY-Stage of Wire Bonder
Authors: Zhou Lei , Li Jian Gang , Zhang Wen Nong , Li Ze Xiang
Published: March 2013

Wire bonder is important equipment in semiconductor post-packaging. In this paper, a speed observer is applied in the motion control system for XY-stage of wire bonder. A simplified friction model is introduced in the observer to take place of traditional friction compensator. With the introduced manual tuning steps, the model can be easily and exactly identified. The compensator of observer is designed by pole placement. As experiments results showing, high motion speed and acceleration of XY-stage is achieved by applying the introduced control structure. The efficiency of wire bonding process is significantly improved.
Applying Automatic Fare Collection System to Estimate a Transit Passenger Trip Origin-Destination Matrix
Authors: Li Da Ming , Shu Bo
Published: March 2013

Automatic fare collection system (AFCS) has been widely used for public transport all over the world. However, the Origin-Destination (OD) matrix of each passenger, the most important information, cannot be collected from AFCS since only boarding information is recorded at each bus stop and alighting one is lost. This study develops passenger trajectories estimation to calculate OD matrix by using pre-processed smart card data from AFCS in one city. The results of a rigorous validation with on/off data from a real-world bus route reveal that the proposed model is quite effective and reliable on estimating the OD matrix for identification of the underlying demand pattern of a transit route. The results have shown that the OD estimation from the proposed algorithm match more than 75% with the actual OD pairs. During the peak hours, the matching rate can go up to 85%.
Intelligent Optimization Consider Hour Traffic Flow Traffic Lights Working Condition
Authors: Wang Ran , Xiao Jian Bo , Zhang Hao , Tan Yu Ying , Ni Ming An , Liu Yang , Zhang Zhi Fu , Xie Xi Ling
Published: March 2013

We design an intelligent optimization system about the response of a traffic signal response, based on a research on traffic at various periods of Wuhan. Fedded traffic flow on the road monitored back to the SCM control system. On the basis of the existing traffic control devices, produce a new intelligent traffic lights according to the traffic flow to change the access time. And optimize the design through modeling and calculation. After simulation, the system significantly reduces the waiting time of the automobile, relieves the burden of traffic at its peak, and eases the pressure on energy and the environment.
Vegetable Intelligent Monitoring System Database Design Based on the Internet of Things
Authors: Lin Nan , Yu He Long
Published: March 2013

Based on the internet of things (IOT), the application of the intelligent monitoring system in agriculture is studied. Tomato cultivation is chosen as the researching object. Various domain experts’ knowledge and experience on internet of things, intelligent control technology and tomato cultivation are integrated. Vegetable cultivation intelligent monitoring system is studied. Detailed design of database, which is the basic part of intelligent monitoring system, is carried out. Design includes conceptual design, logic design and physical design. Further design of the system is also discussed.