bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Preparation Process of ITO Nano-Powder by the Method of Ammonia Complexation
Authors: Sun Li Da , Huang Du Shu , Liu Wei , Jiang Yan , Xiao Rui Min , Li Zi Jing
Published: July 2012

ITO (Indium Tin Oxides) nano-powder was prepared by the method of ammonia complexation. The chemical composition, morphology and crystal structure were characterized by X-ray diffraction (XRD) ,transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy analysis(XPS). Base on the nucleation and growth mechanism of the powder, the temperature of heat treatment impacting on size and morphology was discussed briefly. The results showed that the nano-ITO powder of particle size 20nm-40nm with well-pleasing particle shape and dispersion can be prepared at 800°C.
Alternating Copolymerization of Carbon Dioxide with Cyclohexene Oxide Catalyzed by a Novel Catalyst
Authors: Fan Li Dan , Qin Gang , Cao Xin Xin , Cao Shao Kui
Published: July 2012

A novel catalyst for the copolymerization of CO2 and cyclohexene oxide(CHO) was prepared by using BTE and ZnCl2. The zinc complex showed catalytic activity for the copolymerization. The obtained copolymer was characterized by IR and NMR. Effect of reaction time on copolymerization was investigated.
The Effect of BIMGCS12-3 as the Inhibitor for the Corrosion of Mild Steel in 1M Vitriolic Acid
Authors: Sun Yong Ming
Published: July 2012

The effect of propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), (abbreviated as BIMGCS12-3)， as the inhibitor for the corrosion of mild steel in 1M vitriolic acid was tested. It was found by Tafel polarization curves that BIMGCS12-3 as mixed type inhibitor adsorbed on the mild steel surface forming a protecting film. EIS measurements were carried out in a frequency range of 100kHz to 10mHz with amplitude of 5mV using ac signals at open circuit potential. Changes in impedance parameters (charge transfer resistance, Rct, and double layer capacitance, Cdl) were indicative of the feasibility of BIMGCS12-3 as excellent mild steel corrosion inhibitor in 1M sulfuric acid. Surface morphology of the specimens was examined by SEM.
Monomer Synthesis and Characterization of Novel Aromatic Polyamides
Authors: Hu Wei , Zhang Guang Xian , Zhang Feng Xiu , Zheng Hui , Lu Ming
Published: July 2012

Aromatic polyamides are high performance materials, having outstanding thermal and mechanical properties. Poly(2,5-Diamino-terephthalic acid) (PATA) was designed as a novel aromatic polyamide with high strength and modulus. In this paper, 2,5-Diamino-terephthalic acid (DATA), as a monomer of PATA, was synthesized from 2,5-Dimetyl-1,4-phenyldiamine (DPA). First step was the amidation of DPA by reacting with acetic anhydride to protect amido group. Then N-(4–Acetylamino-2,5-dimethyl–phenyl)-acetamide (AMPA) was oxidized by potassium permanganate. Finally, AMPA was hydrolyzed by sodium hydroxide and the monomer DATA was precipitated by hydrochloric acid around PH 5. DATA and all the intermediate products were characterized and confirmed by 1HNMR and FT-IR spectra. They were all in great agreement with the proposed structure. The overall yield of DATA was about 40.0%.
Influence of Polyols as a Co-Stabilizer on Stabilization Efficiency of Calcium/Zinc Stabilizers to PVC/ACS Blend
Authors: Gao Jun Gang , Yang Jiang Bo , Liu Xiao Qian , Zhu Feng Li
Published: July 2012

In order to prepare good thermal stabilizer for PVC/ACS blends, the Congo red methods was adopted to determine the thermal stabilizing time of blends and study the synergy effect between polyols and Ca/Zn stabilizer for PVC/ACS blends. The rheological behaviors and dynamic mechanical properties of PVC/ACS blends were investigated by rotational rheometer and dynamic mechanical analyzer (DMA). The results showed that the different polyols have different influences on the thermal stability, melt viscosity, dynamic mechanical properties of PVC/ACS blends. The pentaerythritol has a good synergy effect with Ca/Zn stability and the PVC/ACS blend has a lower melt viscosity.
Synthesis and Curing Kinetics of UV-Curable Waterborne Bisphenol-S Epoxy Acrylate/Polyurethane-Acrylate Coating
Authors: Gao Jun Gang , Zhu Feng Li , Yang Jiang Bo , Liu Xiao Qian
Published: July 2012

In ouder to prepare the waterborne UV-curable polyurethane acrylate coatings, the anionic polyurethane acrylate emulsifier and bisphenol-S eopxy acrylate were synthesized. The curing process, kinetics and properties of waterborone UV-curable epoxy acrylate/polyurethanes acrylate coating were investigated by FTIR, DSC and DMA. The results show that the static initial curing temperature Ti is 52.36 oC, peak temperature Tp is 71.58 oC, the finished temperature Tf is 89.15 oC. The curing reaction can be described by two-parameter autocatalytic Šesták-Berggren (S-B) model.This coating has a better UV-curing property. The dynamic mechanical analysis showed that the glass transition temperature Tg of coating film is 52.70 oC.
Electrochemical Behavior of Catechol Oxidation by H2O2 Using the Copper Binding Methanobactin as Mimetic Peroxidase
Authors: Guan Hua Nan , Xin Jia Ying , Chen Dan Dan , Yan Chao Ze , Zhang Ying Xin , Xia Chun Gu
Published: July 2012

The electrochemical behavior of catechol oxidation by H2O2which catalyzed by the copper binding methanobactin in aqueous solutions had been studied using cyclic voltammetry with a glassy carbon electrode. The contribution described the production and purification of a novel copper-binding peptide, methanobactin from Methylosinus trichosporium 3011, among which the copper binding methanobactin exhibited efficient horseradish peroxidase-like catalytic activity. The determinations of mimetic peroxidase activity in human/rat blood, garlic, onion and scallion serve as models for the proposed method. A comparison of the results with established classical analysis is satisfactory.
Synthesis and Research of Lithium Manganese Titanium Oxide
Authors: Jiang Jin He
Published: July 2012

LiMn0.25TiO3was prepared by a solid state reaction crystallization method. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of in 0.1mol /L HNO3 solution is 4.3mmol/g for Li+. It had a memorial ion-sieve property for Li+.
Photocatalysis Property of Titania-Based Thin Films with Covalent Grafting PANi as Sensitizer
Authors: Liu Hong Quan , Lian Fang , Zhang Lin , Liu Meng
Published: July 2012

Polyaniline sensitized titania thin film were fabricated by spin-coating from Ti-precursor containing PEG as surfactant via a sol-gel technique, in which titania-sol was synthesized by hydrolysis of tetrabutyl titanate in water-alcohol solution. The films were characterized by X-ray diffraction, high resolution transmission electron microscopy, field-emission scanning electron microscopy, thermal gravity-differential scanning calorimetry, and tested under self-made photocatalysis instrument. The results showed the synthesized porous films provided the active surfaces for self-polymerization of aniline. Compared with bare TiO2 thin films, the composite films displayed a enhanced photocatalytic activity and could be the potential photocatalyst for indoor air decontamination or self-cleaning films.
Extraction and Determination of Essential Oil in Different Cultivars of Amomum Tsao-Ko
Authors: Zhang Wei , Chen Jun Wen , Shen Yong , Yang Zhi Qing , Xie Shi Qing , Yang Sheng Chao
Published: July 2012

Essential oil in four cultivars fruits of Amomum tsao-ko were extracted and determined by the method of gas chromatography (GC) and GC-coupled mass spectrometry (GC-MS). The essential oils content of 86.50%, 77.05%, 83.02% and 77.50% were achieved in the four cultivars of Ellipse, Fusiform, Spherical, and Conical A. tsao-ko fruits, respectively. The results showed that the identified major common components of the essential oil are 1,8-cineole, citral, α-terpineol, α-phellandrene, α-pinene, β-pinene, γ-terpinen, and nerolidol, the most abundant component is 1,8-cineole which accounts for about 36% in all four cultivars and it may be useful for industrial exploitation as well as chemotaxonomic characterization. The results also indicated that the four A. tsao-ko fruit cultivars belong to eucalyptol-rich type and the observed chemical variability between the studied species and cultivars seems to results from the gengtic variability.
Study on Flotation Process Reclaiming Associated Phosphor from Magnetic Tailing
Authors: Wang Wei Zhi , Han Miao Miao , Yang Chun Guang
Published: July 2012

To make the best use of the mineral resource, the flotation tests were conducted on the magnetic tailings from a low grade vanadium -titanium magnetite ore, reclaiming phosphorites, By having done the conditional tests, the factors which worked on the flotation were researched. The results showed that for the tailings whose P2O5 grade was 3.05% worked by one roughing, three cleanings, one scavenging and the middlings returned in turn, the concentrate whose P2O5 grade was 33.50%,recovery was 92.18% was obtained, and the phosphorite was reclaimed availably.
A Novel Phenomenon of Energy Transfer in Cd1-XZnxSiO3 : 0.01 Mn2+ Phosphor
Authors: Zhou Xin Mu , Li Yong Xiu
Published: July 2012

Cd1-xZnxSiO3:0.01 Mn2+phosphor was synthesized by sol-gel method. It was characterized by excitation, emission spectra and XRD. The luminescent properties show the phenomenon of energy transfer from the tetrahedral coordinated Mn2+ion to the octahedral coordinated Mn2+ion after exciting by ultraviolet light, which boost the performance of the phosphor. With the increasing of Zn2+in Cd1-xZnxSiO3:0.01 Mn2+phosphor, it was observed the excitation spectra broadened and a red shift in the emission spectra, which emission peak moved from 580nm to 589nm.
The Chemicalkinetic Simulation of HCCI Combustion Ignition Process
Authors: Liu Yi , Chen Ling Shan , Li Wei , Zeng Yu
Published: July 2012

The combustion models for HCCI engines which based on CHEMKIN4.0 have been modified and integrated, and a simulation system including a single-zone model has been developed, which could rapidly bring accurate information for prediction of ignition point and control of emissions.
Analog Computation of Forms of Americium Presence in Aqueous Solution
Authors: Lei Jie Hong
Published: July 2012

In geological disposal of radioactive wastes, the study of Americium migration is very important for the safety evaluation of the repository. The forms of chemical components of Americium presence in aqueous solution that directly affect its migration behavior provide a basis for analog computation of the element. This paper uses PHREEQC, the geochemical model, for analog computation of forms of Americium presence in two types of groundwater, and analyzes the morphologies of the main elements and the influencing factors. The results show that the morphology of Americium is mainly controlled by the characteristics of the chemical composition of groundwater, while the PH value also has a great impact on the forms of Americium presence.
Optimization of Microwave-Assisted Extraction of Polysaccharides from Acanthopanax Obouatus Hoo
Authors: Li Xiao Rong , Zhao Peng
Published: July 2012

Polysaccharide from Acanthopanax obouatus Hoo(AHPs) was extracted with microwave-assisted(MAE). The effects of operating conditions, such as extraction time, ratio of water to raw material , and microwave power, on the extraction yield of AHPs were studied through a Box-Behnken design (BBD). The optimum extraction conditions were as follows: extraction time 13.5min, power 796 W and ratio of water to raw material 16.5ml/g. The yield of polysaccharide was 5.18% based on the above mentioned conditions.
Herb Residues Gasification in a Circulating Fluidized Bed
Authors: Guo Fei Qiang , Dong Yu Ping
Published: July 2012

A circulating utilization way of herb residues is designed to convert herb residues to gas fuel in industrial-scale by a circulating gasification bed gasifier in this work. The gasification characteristics of herb residues in the circulating fluidized bed of 300kg/h were investigated in about 200 hours. The results indicated that the gas composition and tar yield were affected by oxygen to biomass ratio (O/B ratio). The lower heating value of product gas was 4 to 5MJ/m3 using herb residues as feedstock. When O/B was 0.37, the product gas reached a good condition with lower heating value of 4.89MJ/m3.
Study on the New Flotation Agent Regime for Sichuan Lead-Zinc Mine
Authors: Zhang Xiao Lin , Fang Jian Jun , Liu Dian Wen , Zeng Shu Qin
Published: July 2012

Ore samples, collected from a lead-zinc oxide ore deposit in Sichuan province, China, are very difficult to treat with such characteristics as low grade, uneven mineral particle distribution and high containing of slime. It is very difficult to separate the lead minerals and zinc minerals, especially for the recovery of zinc oxide minerals. On the basis of flotation characteristics study to gangue and useful minerals, author studied flotation behavior of lead-zinc oxide ore with new collectors (KM21 and YO-1), and carried out the experiment on separating useful minerals from gangue minerals. Test results showed, a lead concentrate with a grade of 59.78 percent and a recovery of 86.49 percent and a zinc concentrate with a grade of 48.53 percent and a recovery of 84.92 percent were obtained from the crude ore with the oxidation rate of 74.34 percent and 89.30 percent of lead and zinc respectively, which realized the high efficient flotation separation of the refractory lead-zinc oxide ores.
Synthesis and Properties of Multi-Functional Leather Finishing Agent
Authors: Song Xu Mei
Published: July 2012

With the collagen hydrolyzate by alkali extraction from chromium-containing shavings as raw material, the protein leather finishing agent is prepared in this work. The monomers of acrylic acid series and namo-TiO2 are applied in physical and chemical modification of the collagen. The structure of the protein finishing agent is characterized by IR. The optimum technological conditions are determined by the orthogonal tests. The remarkable characteristics of this method were the lower bromine number, the better chemical and mechanical stability, and the better repeatability of the product. The resistance to dry and wet rubbing fastness and water resistance of the protein finishing agent are superior to that of the conventional leather finishing agents. The protein finishing agent has also antimicrobial performance.
Lithium Recovery Techniques from Solid and Liquid Mineral Resources
Authors: Zhang Hui Zong , Shen Dong Liang , Gao Dao Lin , Wang Shi Qiang , Guo Ya Fei , Deng Tian Long
Published: July 2012

Lithium and its compounds are important materials in industry. In this paper, lithium recovery methods both from solid ores and brines were summarized, and the key problems existed were also pointed out. More details for lithium recovery from brines by solvent extraction, ion-exchange, precipitation and calcination leaching methods were discussed, and the new trend for lithium recovery in the future was also carried out.
Analyses of Phase Transformation Mechanism Based on In Situ Observation during Ti-10Nb-5Sn Alloy Heating Cycles
Authors: Li Yan , Qi Jie , Zhai Chuan Xin , Qiu Ran Feng
Published: July 2012

The Ti-10Nb-5Sn alloy was heated and cooled repeatedly in a heater system located in transmission electron microscope chamber. The phase and morphology transformation was in situ observed to analyze the transformation mechanism from austenite β to martensite phase. The results reveal that he Ti-10Nb-5Sn alloy has round trip shape memory function.
Study on Property of Anti-Bacterial UV Ink with Zinc-Copper
Authors: Huang Wen Tao , Chen Guang Xue , Tang Bao Ling , Yu Ming Guang
Published: July 2012

The packaging of food, beverages, tobacco, alcohol, drugs, cosmetics and other goods requires higher property of security and some special functionality such as the property of anti-bacterial; the property of anti-bacterial can be achieved by using anti-bacterial agent in the ink. In this paper, a kind of zinc-copper antibacterial agent was made by attached the metal Zn2+, Cu2+on the zeolite by ion exchange and the zeolite modified was used as a carrier; Than the zinc-copper anti-bacterial UV ink was prepared by mixing and grinding zinc-copper antibacterial agent, polyester acrylate, HDDA, TMPTA, titanium dioxide and other element of UV ink; Finally the property of anti-bacterial of Escherichia.coli(anti-E.coli) and staphylococcus aureus were tested; this paper focus on the analysis and discussion of the influence of different concentration antibacterial agent on the property of ink. This study has some practical significance to the research on the property on anti-bacterial of ink.
The Influence on Brittle of Microstructure of Laser Quenching/Nitriding Layer
Authors: Cheng Yi Yuan , Wang Cheng Qiang , Chen Zi Zhen , Niu Yong Jun
Published: July 2012

Have studied microstructure of the gas nitriding layer and the laser quenching/ nitriding layer using the X-ray diffractometer and the transmission electron microscope to the brittl of nitriding layer. The results show that the content of Fe3N in composite nitrided layer increased from 14.74% to the 69.45%, while the crisp hard ξ-Fe2N content dropped from 79.95%to 25.03%, Especially the Cr2N particles are much finer and the depth of the nitrided layer increases. There have phase relation, coherence and compatibility between γ'-Fe4N and α-Fe. spherical particles of cementite was formed in lower strip bainite, while the γ′ of gas nitriding diffusion layer is big, the carbide assumes the long strip off and with distributing certain directivity. Brittleness of laser hardening/ nitriding layer reduces.
Antistatic Poly(Ethylene Terephthalate)/Polyaniline-Coating Multiwalled Carbon Nanotubes Nanocomposites
Authors: Wang Ruo Xi , Wang Hua , Zheng Kang , Tian Xing You
Published: July 2012

A convenient method had been developed for preparing antistatic Poly(ethylene terephthalate)/multiwalled carbon nanotubes (PET/MWCNTs) nanocomposites. Polyaniline (PANI) was employed to coat MWCNTs as interfacial modifier. At first, the PANI-coating MWCNTs (PANI-c-MWCNTs) were prepared via miniemulsion polymerization of aniline at the presence of MWCNTs. The TEM images, FT-IR spectra, UV-Vis spectra and electrical conductivity were investigated, which indicated that the MWCNTs were coated with a conductive PANI ultrathin film while the morphology and electrical property had almost no damage. Then the PANI-c-MWCNTs were added into PET through in-situ polymerization method. The TEM images indicate that PANI-c-MWCNTs could be well dispersed in PET matrix, which had important positive effects on the electrical conductive properties of PET/PANI-c-MWCNTs nanocomposites. The results indicate that the electrical conductivity of PET/1.0 wt% PANI-c-MWCNTs nanocomposites reaches the antistatic level.
Performance Evaluation of High Modulus Asphalt Mixture with Button Rock Asphalt
Authors: Du Shao Wen , Liu Chao Fei
Published: July 2012

In this paper, Button rock asphalt particle was directly added into hot asphalt mixture (HMA) to produced high modulus asphalt mixture (HMAM). In order to evaluate the performance properties of HMAM with BRA, dynamic compressive complex modulus (E*) test, rutting test and moisture resistance test were used to investigate HMAM with BRA and HMA with SBS modifier. Test results indicate BRA can greatly improve dynamic E*and rutting resistance of HMA compared with SBS modified asphalt mixture. Moisture resistance ability of HMAM with BRA has the same level with SBS modified asphalt mixture. Therefore, BRA particle can be used to produce HMAM, which have more superior performance properties than SBS asphalt modifier.
Applications of Phase Change Materials for Energy Saving
Authors: Liu Huan , Tang Yan Rong , Guo Ya Fei , Wang Shi Qiang , Deng Tian Long
Published: July 2012

Energy demand to ensure a comfortable environment for humans has increased worldwide, especially in the application of phase change material (PCM) for resident living. In this paper, the current applications of PCMs including solar water-heating system, solar cooker and residential building aspects were presented, and the suggestions for future works were also discussed.
The Strip Steel Surface Defects Detection Adaptive Preprocessing Method Based on Double Field
Authors: Wei Yu Lan , Li Bing , Zhang Dan , Qin Yun Hai
Published: July 2012

Double field detection method can effectively solve missing detection and mistake detection problems. But because the image data is two times as single field detection, and therefore the detection speed is slow. A new Processing flow is put forward. Firstly, the suspected defect images are filtered out, and only the images that contain defects can be processed in the follow programs. Secondly, the retained suspected defect images are divided into two categories. Different categories are handled by different process. The simulation experiment result shows that: it not only makes full use of the advantages of the double field method, and greatly reduces the image data quantity, at the same time ensuring the real-time of the system.
The Nonlinear Dynamic Response of Functionally Graded Material Flat Spherical Shells Subjected to Thermal Loading
Authors: Dai Yao , Chong Xiao , Zhang Lei , Chen Hong Qian
Published: July 2012

The response of functionally graded material flat spherical shells subjected to thermal loading is studied using the method of lines. Based on the Kirchhoff straight normal hypothesis and Von Karman's geometrically nonlinear theory, the governing equations are obtained. A semi-analytical numerical method, viz. the method of lines is introduced. Then, the partial differential equations are transformed into ordinary differential ones. The numerical results of flat spherical shells are given and compared with ones of the finite element method. The effects of the material gradient parameters on the responses are discussed in details.
Preparation and Photocatalytic Property of Lanthanum-Doped TiO2 Nanoparticles
Authors: Li Qing , Wen Rui Zhi
Published: July 2012

Nano-TiO2photocatalyst powders were prepared through the sol-gel method and supercritical fluid drying(SCFD). The TG-DTA、XRD、particle size distribution technique、SEM were used to characterize the hyperfine TiO2particles.The lanthanum-doped TiO2with different mass percentage of La3+were compared with pure TiO2when used as photocatalyst in degradation of methyl orange. The best catalytic activity was observed with 0.02(mol)%La-TiO2. Photocatalytic efficiency of the 0.02(mol)%La- TiO2is improved by 30.79% comparing to pure TiO2.
Acoustic Absorption Performance Research of Coir Density Board
Authors: Yao Jia , Ma Li Li , Wei Lu , Jiang Li Wei , Li Ya Qin
Published: July 2012

Coir fiber is one of the tropical fruit fibers, the effective use of coir is not comprehensive now and the phenomenon of resources waste still exists. Full study of the advantage characteristics of coir has important significance for the expansion of the application field of coir resources. This article determines the light porous characteristics of coir from the micro-morphological characteristics. Through the prediction model research of the sound absorption coefficient of the porous fiber materials, the optimization density and the optimization thickness ranges can be got for the coir density board, so as to guide the optimization design of the sound absorption performance of coir density board. The changing rule of the sound absorption coefficient of the coir density board has been got by adopting the wave impedance tube method and the sound absorption coefficients by adding 5cm air gap has also been researched. The results of the experiments confirm that coir density board can be used as a secondary noise absorption material; the practical applications of coir density board are as the lightweight wall, the car interior trim or seat filling materials and the shipping cabins materials, to reduce the corresponding environment noise.
Preparation and Properties of Calcium Sulphate Whisker/Natural Rubber Composites
Authors: Man Zhong Biao , Chen Yue Hui , Yang Miao
Published: July 2012

The ultrasonic dispersion method and mechanical blending method were used to modify the calcium sulphate whisker (CSW). Modified CSW were characterized with scanning electronic microscopy (SEM). The different modified calcium sulphate whisker (CSW)/natural rubber (NR) composites have been prepared respectively, and then the properties of the composites were studied. The results showed that the effect of CSW modified by the ultrasonic dispersion method was better than mechanical blending method, and the CSW/NR composites modified by the ultrasonic dispersion method had the optimum properties.
Supercritical CO2 Extraction of Rhizoma Atractylodis macrocephalae
Authors: Huang Zhen , Shi Xiao Han , Liu Shao Fang , Jiang Wei Juan
Published: July 2012

An orthogonal array design was employed for optimizing the supercritical CO2extraction of Rhizoma Atractylodis Macrocephalae. The extraction was performed at temperature from 40 to 60oC, pressure from 15 to 35MPa, extraction time varying from 30 to 90min and particle size spanning from 20 to 80 mesh. The results reflect that the extraction yield is more significantly influenced by the extraction time, pressure and particle size but less by temperature. The experiments show that the extraction yield obviously increases with increasing pressure, different from the literatures. In terms of the sample origin, a comparison shows that outstanding differences exist among the extraction yields from different sources.
Research on the Impact of Surface Characteristic of Paper on Digital Printing Color Reproduction
Authors: Huang Xue Lin
Published: July 2012

The different paper has the different Surface Characteristic, which has the different influences on the printing color Reproduction. Through the paper printability, the color gamut experiments of digital printing, The influence of surface characteristics of paper on digital printing color reproduction was analyzed according to color rendering ability, The results indicated that the printed matter had better color efficiency, greater color gamut and smaller hue error and grayscale which had higher paper smoothness and glossiness, the higher paper whiteness is in favor of color reproduction. The surface characteristic of paper limits color reproduction. To ensure printing quality, should choose better color efficiency of paper.
Study on the Mechanism of Fired Bricks from Iron Tailings
Authors: Liu Lian Hua , Du Gao Xiang , Liao Jing Hui
Published: July 2012

Fired bricks were prepared by using iron tailings from Inner Mongolia as the main material based on analysis of its basic characterization and investigate the performance and mechanism of fired bricks at different firing temperature. The results showed that the density and compressive strength increased with the rise of firing temperature, while the water absorption decreased. The analysis demonstrated that calcite was decomposed into CaO and CO2 at 800°C completely by DTA-TG and XRD, which lead to the increase of pore and decrease of density. Kaolinite was decomposed into metastable quartz and metakaolin at about 850°C and then hornblende transformed into quartz and hematite with the rise of temperature. The SEM photographs showed that the glass phase was increased and the sheetlike fabric was decreased when the firing temperature rose to 1100°C. The glass phase was filled into the pores contributing to the decrease of the porosity and making the bricks more compact which help to improve the bulk density and compressive strength. The glass phase was concerned with the reaction, which can help the grain diffusion and thus increase the speed of reaction.
The Direct Characterization for the Modified Filler by Oil Absorption Ratio
Authors: Liu Xiang Yun , Zhou Xue Yong , Qu Li Li , Yao Qi Cai , Wang He
Published: July 2012

The method for characterizing the modified filler directly by oil absorption ratio was studied. The oil absorption ratio of heavy CaCO3 is decreased with the increase of modifier amount in the early stage, but then a slow decline was observed after an inflexion point. The optimal amount of the modifier was calculated at the inflexion point of the curve of oil absorption ratio. The results showed that the optimal amount of the modifier for 400 mesh, 700 mesh, 1000 mesh and 2000 mesh CaCO3 was 0.8%, 0.9%, 1.0% and 1.5%, respectively. The CaCO3 powder was treated with the modifier at the optimal amount, then the masterbatch was prepared by the modified CaCO3. The melt-flow rate experiment for the masterbatch showed that the direct characterization method for the CaCO3 powder was efficient when its particle size was between 400 and 1000 mesh.
Research and Simulation of MEMS Polycrystalline Silicon Resonance Mass Beam Sensor
Authors: Shi Xin , Fan Yan Li , Li Qing En
Published: July 2012

The corresponding development of resonance mass beam pressure sensor in decades is introduced and a serial of theory analysis is executed. The advantages and disadvantages are studied on the resonance mass pressure sensor. Through the finite element analysis software ANSYS, the stress and strain distribution situation is obtained in this paper. Under the outside overload pressure situation, we find that the linearity of the resonance mass beam pressure sensor presents a declining situation, but in a small range. From the total performances of sensor, it still keeps a good condition. Under the 260 times of rang pressure, the sensor chip deformation is only 14.5um, which is a kind of very small deformation situation. That is to say the resonance polycrystalline silicon mass beam sensor designed here has a high reliability under the outside overload pressure situation.
Polarized Infrared and Raman Spectra on Molecular Orientation of Phthalocyanine Derivatives in Nanolaminated Films
Authors: Cui Hai Ning , Liu Shi , Cao Li Fen , Xi Shi Quan , Li Xiao Xia , Xiao Hai Xia , Guo Hui Miao
Published: July 2012

The orientation of the hydrocarbon chains and functionally important chromophore of copper (II) phthalocyanine (CuPc) derivatives are discussed by spectrum assessment methods in ordered thin films. The attention is focused upon the monolayer and multilayer films of CuPc derivatives that are symmetrically and asymmetrically substituted CuPc biosimulation systems. On the basis of infrared (IR) transmission, polarized IR, reflection–absorption (RA) IR spectroscopy and surface enhancement resonance Raman spectra (SERRS) study, following conclusions are given. The hydrocarbon chains of CuPc in the film are in hexagonal or pseudohexagonal subcell packing, and the CH2 asymmetric vibrational vector is oriented with respect to the substrate surface. The macrocycle of CuPc on the Ag substrate is oriented parallel to the surface, and the RA spectroscopy can distinguish the two CH2 stretching modes of benzene cycle. All these studies and results are useful to provide an insight into the nanostructure of the thin films of other kinds of compounds.
Laser Composite Surfacing of a Magnesium Alloy with TiO2 Nanoparticles
Authors: Zhang Min , Chen Chang Jun , Fei Qun Xing
Published: July 2012

In the study, ZM5 Mg alloy was laser melted by dispersion of TiO2nanoparticles on its surface. The microstructure of the composite surfaced layer (both the top surface and the cross section) was characterized by optical and scanning electron microscope. A detailed analysis of the composition of the composite layer was carried out by energy dispersive spectroscopy. The microhardness of the composite layer was measured and the wear of the composite surfaced ZM5 was studied. Experimental results showed that composite surface layer consists of TiO2particles in grain refined ZM5 matrix, but the nanoparticles was agglomerated. And there was degradation of TiO2particles or interfacial reaction at the particle-matrix interface. Microhardness and wear resistance of the composite surfaced zone was improved compared to ZM5 substrate.
Enhanced Thermal Properties of Cyanate Ester Resin by Epoxy-Functionalized POSS
Authors: Zhang Zeng Ping , Pei Jian Zhong , Fang Chang Qing , Chen Shuan Fa
Published: July 2012

Cyanate ester resin (CE)/epoxy functionalized polyhedral oligomeric silsesquioxane (POSS-Ep) organic-inorganic hybrids were prepared by casting and curing. The hybrid resin systems were studied by gel time test to evaluate the effect of POSS-Ep on curing reactivity of CE. Impact and flexural strengths of the hybrids were investigated. The thermal properties of the hybrids were studied by thermogravimetric analysis (TGA). TGA results show that CE10 also possesses the best thermal stability. The initial temperature of decomposition (Ti) of CE10 is 426 oC, 44 oC higher than that of the pristine CE.
Kinetics of Hydrothermal Decomposition of Potassium Feldspar with Calcium Hydroxide
Authors: Liu Yu Qin , Xia Hong Tu , Ma Hong Wen
Published: July 2012

The aegirine-augite syenite potash ore, taken from Changling, Luonan in Shannxi province, were hydrothermally decomposed over the temperature ranges of 533 K to 563 K using calcium hydroxide as additive. The dissolution ratio of the K2O at different reaction temperature and time was determined. Analysis of the experimental results revealed that the dissolution rate of potash ore satisfies the chemical reaction controlled kinetic equation. The rate constant of hydrothermal reaction at different temperatures was obtained. The activation energy was calculated using the Arrhenius equation. The hydrothermal decomposition mechanism of microcline was proposed.
Study on the Property of Ba0.85Ca0.15Ti0.9Zr0.1O3 Lead-Free Piezoelectric Ceramics Doped with Li2CO3
Authors: Zhu Zhi Wen , Huang Xin You , Hua Hai Tang , Li Yan
Published: July 2012

Ba0.85Ca0.15Ti0.9Zr0.1O3-xLi2CO3 lead-free piezoelectric ceramics (abbreviated as BCZT-xLi) were prepared by conventional solid state reaction method. The microstructure, piezoelectric properties and dielectric properties were studied for BCZT-xLi samples doped with different Li2CO3 content(x= 0, 0.05, 0.1 0.2 0.3, 0.4wt. %). The results show that the piezoelectric constant(d33), planar electron mechanical coupling coefficient(kp) and thickness electron mechanical(kt) of BCZ-T-xLi ceramics increase firstly and decreases subsequently with increasing of Li+ doping amount, the dielectric loss(tanδ) of BCZT-xLi ceramics decreases firstly and then increases at the same time while Li+ doping amount increases. But the r-elative permittivity (εr) of BCZT-xLi ceramics increases all the time. With the in-creasing of the amount of Li2CO3 doped the grain size of BCZT-Li ceramic first increases and then decreases. The BCZT-xLi ceramics display the optimum properties (d33=83, tanδ=0.035, εr=2020, kp=0.41, kt=0.046) while Li2CO3 doped amount is 0.20wt. %.
Research on Corrosion and Monitoring Methods of Pressure Vessels in Sulfur-Containing Natural Gas Purification Plants
Authors: Shang Jian Feng , Tian Gang , Liu Yuan Zhi , Xiao Guo Qing , Long De Cai , Zeng De Zhi
Published: July 2012

Pressure vessels in high sulfur-containing natural gas purification plants are likely corroded in acid media. Corrosion monitoring and control must be carried out to ensure safety and efficiency of purification system. So corrosion cause and service characters of pressure vessels in the purification plants were analyzed in this paper. The factors which influence pressure vessels corrosion include acid gas load, flow rate, phase state, temperature, heat-stable salts and degradation products. Then adaptability, advantages and disadvantages of the methods such as weight loss hanging slice method, electrochemical monitoring, ultrasonic thickness measurement, etc. were also analyzed in the paper. The results show that current on - line corrosion monitoring methods are hard to be applied in high sulfur-containing natural gas purification plants. Weight loss hanging slice method is an effective approach for pressure vessels corrosion monitoring. The data obtained are reliable and the investment is relatively lower. Based on characteristics of different technology units, corrosion coupon monitoring scheme is established. The research result provides a solid base for ensuring safe operation of high sulfur-containing natural gas purification plants.
Numerical Study on the Interaction between Continuous Wave Laser and Polyimide
Authors: Chen Hua , Tang Wen Hui , Ran Xian Wen , Xu Zhi Hong
Published: July 2012

Polyimide is a typical complex high-molecular polymer of imide monomers which is widely used in the manufacture of parts for aerospace technology. In order to improve the safety of spacecraft, the interaction between continuous wave laser and polyimide is studied. Firstly the Hugoniot parameters for a kind of polyimide made in Shanghai Research Institute of Synthetic Resins are obtained in two-stage light-gas gun driven flyer loading way, and the Grüneisen coefficient is determined with the Huang equation and the shock compression experiment data. Then the interaction between continuous wave laser and polyimide is numerically studied with a smoothed particle hydrodynamics program which compiled by ourselves with the FORTRAN language, the ablation process are obtained.
Broadband Micro-Wave Absorption Properties of Ni-P Coated Fe Nanoparticles by Electroless Plating Process
Authors: Shi Gui Mei , Sun Wei Min , Lu Da Wei , Lian Shu
Published: July 2012

Fe nanoparticles with shell of Ni-P coating layer were successfully synthesized using Ni electroless plating process. Electromagnetic-wave absorption of Ni-P coated Fe nanoparticles has been investigated. In contrast to earlier reported materials, the absorption amplitude of as-prepared samples is found not largely decrease with increasing absorption-layer thickness. A reflection loss (RL) exceeding -20 dB can be obtained for almost the whole frequencies within the 2-18GHz range by choosing an appropriate layer thickness between 0.9 and 6.0mm. The broadest bandwidth (RLu-bands(12-18GHz), is obtained for 1.1mm layer. At the same time, it is worth noticing that in a thin thickness range 0.91-2.0mm, the reflection loss (RL) exceeding -10 dB in the 6-18GHz range is obtained, which covers half of C-bands (4-8GHz), the whole X-bands (8-12GHz) and Ku–bands (12-18GHz).
Effect of Wettability on Tribological Properties of Porous UHMWPE
Authors: Wu Gang , Chen Shuang Kun , Qin Hong Ling , Zhao Chun Hua
Published: July 2012

Porous UHMWPE with different characteristics are prepared by hot press molding in Metallographic Sample Mounting. Friction and wear loss of porous UHMWPE samples are studied under different loads and lubricant on an improved tribological tester. The friction coefficient and wear loss of samples with porosity of 5.44% are lower than that of samples with porosity of 10.17%. Thickness of porous layer has little effect on the tribological properties of porous UHMWPE. Contact angle remarkable decreases with increasing porosity of UHMWPE samples. The change of wettability is the primary cause of the improving tribological properties of porous UHMWPE.
Non-UV Driven Self-Cleaning and Anti-Fogging Glasses Prepared by Ultrasonic Nebulization of TiO2 Hydrosol
Authors: Shi Jing Jing , Yang En Long
Published: July 2012

Highly transparent glasses coated with TiO2 hydrosol and polyethylene glycol (PEG) have been successfully fabricated via ultrasonic nebulization technique. Experimental evidences have indicated that the obtained glass surfaces show excellent non-UV activated superhydrophilic wetting and antifogging performance. These properties are significantly affected by calcination temperature and the optimal value is 600 oC. In this paper, the effect of film thickness and the role of PEG in facilitating the pore formation and interacting with TiO2 are also discussed.
Design of a SOFC Single Cell Test Device
Authors: Cheng Hong Hui , Pan Jin Ping , Zeng Li , Zhang Jin Yao , Wang Wei Guo
Published: July 2012

The electrical performance of single cell of anode-supported planar solid oxide fuel cell (SOFC) received much concern. In this paper, measurement principle, design method and experimental processes of the electrical performance test device for SOFC single cell were introduced. The fluid system of the device consisted of flowmeters, valves, tubes, furnace, etc. The measurement system of the device consisted of digital direct current voltage meter, chromatography work station, and industrial computer, etc. The operator could aquire the test data by the electronic load and work station operation software in the industrial computer.
Research of Thermal Shock Resistance of Si3N4 and SiC
Authors: Zhang Fang , Huang Zhi Liang
Published: July 2012

The study is carried out combing with the production practice in Danjiangkou Hongyuan SiC limited. Si3N4 and SiC were prepared successfully from SiC and Silicon power in nitrogen atmosphere at 1425°C and 1375°C sintering temperature by the serial of techniques, such as ingredients, mixing, molding and drying, respectively. In the actual production, silicon powder content and sintering temperature will directly influence the products of the bending strength and thermal shock resistance. By measuring bending strength, porosities, bulk density, XRD and FESEM, the bending strength and thermal shock resistance of samples were studied mainly by changing sintering temperature and silicon powder content. The results show that bending strength and thermal shock resistance of sample which was added 16% Si powder is best. And bending strength and thermal shock resistance of sample of 1425°C sintering temperature is higher than that of 1375°C sintering temperature.
Microstructure Effects on Corrosion Behavior of Mg-Zn-Zr-Nd ZM6 Magnesium Alloy
Authors: Chen Chang Jun , Zhang Min , Fei Qun Xing
Published: July 2012

The effect of microconstituents on the corrosion and electrochemical behavior of Mg-Zn-Zr-Nd ZM6 magnesium alloy prepared by die-casting and ingot casting route has been investigated in 3.5Wt%NaCl solution.The experimental techniques used include long term immersion test and potentiodynamic polarization experiments. Surface examination and analytical studies were carried out using optical(OM) and scanning electron microscopy(SEM) and X-ray diffraction(XRD). Die-cast ZM6 magnesium alloy with smaller grain size offered marginally lower corrosion rate. In die-cast and ingot, corrosion attack took place preferentially on α-Mg phase. XRD patterns of non-corroded surface revealed α-Mg and Mg12Nd phases. The corrosion products for ZM6 ingot consisted of Mg(OH)2 together with α-Mg and Mg12Nd phases. The corrosion resistance of ingot is higher than diecast sample.
Wood-Polymer Composite Fabricated by Polymerization of Monomers within Wood Porous Structure
Authors: Dong Xiao Ying , Gong Ding Wang , Liu Zhen Bo , Liu Yi Xing
Published: July 2012

A novel composite, wood-polymer composite, was fabricated by polymerization of functional monomers within wood porous structure. The wood was a fast-growing plant wood, Micheliamacclurel wood, which was rarely reported in previous studies, and two functional monomers, glycidyl methacrylate and ethylene glycol dimethacrylate, were novelly employed. The monomers, added with a few Azo-bis-isobutryonitrile as initiator, and maleic anhydride as catalyst, were first impregnated into wood pores under vacuum/pressure conditions, and then in-situ polymerized into polymers through a catalyst-thermal treatment. After the processes, wood-polymer composite was resulted. SEM and FTIR analysis for the composite indicated that the monomers polymerized into solid polymer, which fully filled up wood pores, and the resulted polymer grafted onto wood matrix, resulting in good interface combination between polymer and wood matrix. Such composite with satisfactory interface can be potentially applied as structural material in construction field.
Dyeing Acceleration Theory of Molecule Companion on Silk with Reactive Dyes
Authors: Zhang Guang Xian , Zhong Ling , Zhang Feng Xiu , Xue Xu Ting , Lu Ming , Zheng Hui , Wu Da Yang
Published: July 2012

In this paper, a novel high efficient dyeing acceleration theory of molecule companion(DATMC) on silk with reactive dyes was invented and studied. Organic cations were used as accelerants to company reactive dyes to dye on silk, and the dyed silk was washed with anionic surfactant. The results showed that the dye-uptake rates were very high, nearly 100%. But if the carbon atom number of hydrophobic hydrocarbon chain of organic cation was equal to or more than 12, the organic cation would affect the fixation reaction of reactive dye on silk. On the contrary, if it was equal to or less than 8, the fixation reaction would be accelerated. The fixation rates were 98.10% and 98.48% with octyl trimethyl ammonium bromide(OTAB) and hexyl butyl dimethyl ammonium bromide(HBDAB) as accelerants, respectively. The fastnesses of dyed silk were 4-5, and the silk could be dyed uniformly if the accelerant was added in several times.
Synthesis and Characterization of Carbon/Bentonite Composite
Authors: Zhang De Yi , Wu Jing , Chen Bai Yi , Luo He Ming , Wang Kun Jie , Li Hong Xia
Published: July 2012

In this paper, a novel carbon/bentonite composite was prepared using sucrose as carbon source and bentonite as raw material. The characterization results shown that plenty of carbon particles distribute on the surface of the composite, and an abundant of functional groups, such as SO3H, carboxylic and hydroxyl groups, were successfully introduced onto the surface of the prepared composite. The adsorption capacity of the prepared composite for typical heavy metal ions and methylene blue deys also was investigated and compared with activated carbon and bentonite, the results show that the composite shows excellent adsorprion performance for heavy metal ions, and the adsorption capacity for Cu2+and Ni2+ increase by 136% and 591% than natural bentonite, respectSuperscript textively. The prepared composite with excellent adsorption performance could be used as a low-cost alternative to activated carbon for the treatment of heavy metal ions polluted wastewater.
Research on the Mechanical Properties of Cement Recycled Reclaimed Asphalt Pavement Mixture
Authors: Du Shao Wen , Liu Chao Fei
Published: July 2012

In this paper, cement is used to stabilize reclaimed asphalt pavement materials (RAP) and original aggregate with the same gradation. Compressive strength, freezing-thawing resistance and fatigue life of cement recycled RAP mixture (CRAPM) and cement stabilize original aggregate mixture (CSAM) are evaluated. Test results indicate the compressive adhesive strength of cement-RAP is lower than cement-original aggregate. At the same gradation, RAP has negative effect on the freezing-thawing resistance of CRAPM, and can increase the fatigue life sensitive to stress level. Therefore, for using 100% RAP, it is necessary to increase the cement content to properly improve the strength and durability of RAPM in order to satisfy the specification of cement stabilized base materials in china.
XPS Spectra of Cu Thin Films Prepared by Ionized Cluster Beam Deposition
Authors: Cao Bo , Yang Tong Rui , Li Gong Ping , Cho Seong Jin , Kim Hee
Published: July 2012

The Cu thin films were deposited on P type Si (111) substrates by ionized cluster beam (ICB) technique. The surface properties and atomic binding energy of Cu thin films were studied by X-ray Photoelectron Spectroscopy (XPS). The results show that for all XPS spectra of Cu/SiO2/Si (111) samples deposited by neutral cluster and ionized cluster beam (Va=5 kV), the atomic binding energy of the films was no differences with bulk materials. The reason may be that the local energy deposition and atomic restructuring caused by surface treatment process resulting in the XPS spectra of the copper films was similar with bulk standard copper.