baber/WOPTO huggingface dataset:
Patent KR-20030040640-A (KR)
Title: Device For Transfering The Heat
Inventor: LEE YONG DEOK
IPC: F28D15/02
Filed: 2001-11-15
Abstract: PURPOSE: A heat transfer device is provided to achieve improved cooling ability by dividing the evaporator and condenser through the use of the fluid channel and vapor channel. CONSTITUTION: A heat transfer device comprises an evaporator(9) for absorbing and removing the heat generated from a heat source(1) while evaporating the liquid refrigerant; a vapor channel(12) for passage of the gas refrigerant with the heat absorbed from the evaporator; a condenser(10) for condensing the gas refrigerant transferred through the vapor channel, and discharging the condensed refrigerant to outside through a cooling fin(18); and a liquid channel(11) for transferring the liquid refrigerant from the condenser and to the evaporator. The evaporator includes an evaporating member(15) for permitting the liquid refrigerant introduced from the liquid channel to absorb the heat generated from the heat source; and a membrane(17) for separating the evaporating member from a steam chamber(14) in the evaporator.
Patent KR-20030041607-A (KR)
Title: Apparatus and method for program download in MCU board
Inventor: YOON BONG GI
IPC: G06F9/445
Filed: 2001-11-20
Abstract: PURPOSE: A device for downloading a program of a main control unit board and a method thereof are provided to download a program to an ISP-PLD(In System Programmable PLD) device through a communication cable connected to a LAN(Local Area Network) port and a serial port in an MCU(Main Controller Unit) design board. CONSTITUTION: A CPU of a computer downloads a PLD(Programmable Logic Device) program. The PLD program is transmitted to a LAN port or an RS232 port of an MCU design board through a LAN port or an RS232 port. The CPU of the MCU design board receives and temporarily stores the PLD program in a RAM(S510-S520). The CPU of the MCU design board sets a download path with respect to a PLD selection circuit through a CPU interface circuit of a download unit(S530). The CPU downloads the PLD program to a corresponding ISP-PLD through a PLD interface circuit(S540). A download execution state is continued until the PLD program is completely downloaded to the corresponding ISP-PLD(S550). The CPU reads an actually downloaded program through a PLD interface circuit, a PLD selection circuit, and a CPU interface circuit from the ISP-PLD. The CPU compares the read PLD download program with the PLD program temporarily stored in the RAM, and judges whether an error is generated(S560). If an error is generated, the error is informed to a user(S580). If the state is normal, the corresponding ISP-PLD device is initialized(S570).
Patent KR-20030041702-A (KR)
Title: LLLT/LEDT Low Level Laser Therapy
Inventor: KIM BYUNG CHUL
IPC: A61N5/067
Filed: 2001-11-21
Abstract: PURPOSE: An LLLT/LEDT low level laser therapy apparatus is provided to devise self-restoration of diseases related with the anus, urinary organs and woman's diseases while eliminating the pain of the above organs. CONSTITUTION: The LLLT/LEDT low level laser therapy apparatus comprises a planar array consisting of a plurality of semiconductor laser elements or light emitting diodes(4a,4b,4c). Such an array is installed inside a seat panel of a toilet bowl and adapted to irradiate light toward the hip and abdomen of the user. The wavelength and output of the irradiated light can be adjusted appropriately as occasion demands.
Patent KR-20030042844-A (KR)
Title: Apparatus and method for driving of plasma display panel
Inventor: HUH JEONG EUN
IPC: G09G3/292
Filed: 2001-11-24
Abstract: PURPOSE: An apparatus and a method for driving a plasma display panel is provided to improve a contrast ratio and reduce a time for initialization by detecting an electric signal of an initial waveform and controlling the initial waveform. CONSTITUTION: A sensing portion(41) senses an electric signal of an initial waveform which is supplied from a voltage source(36) to a display panel(39). A control portion(43) controls the electric signal of the initial waveform which is supplied from the voltage source to the display panel. The control portion is formed with a switching element arranged between the voltage source and the display panel. The electric signal is one of the voltage and the current. The voltage source is one of a setup voltage source and a setdown voltage source. The sensing portion is formed with a resistant element installed between the control portion and the display panel.
Patent KR-20030043149-A (KR)
Title: An apparatus for monitoring birds nest in blast furnace by measuring thrust forces
Inventor: KIM BU YEONG
IPC: C21B7/24
Filed: 2001-11-27
Abstract: PURPOSE: An apparatus for checking birds nest of dead man coke is provided to obtain information capable of taking operation action to check size of the birds nest through resistance degree corresponding to thrust during admission of measuring lance and improve the dead man coke state according to measurement degree of the birds nest. CONSTITUTION: The apparatus comprises a transfer car(10) on the lower part of which wheels(5) are mounted so that the transfer car(10) is moved; a lance driving part(15) for moving a lance(12) back and forth, the lance(12) is capable of being entered into the blast furnace through the tuyere of the blast furnace on the transfer car(10); and a thrust measuring part(40) comprising a load cell(35) mounted on the rear end of the lance(12) to detect admission resistance of the lance into the blast furnace and a control computer(42) for collecting thrust resistance values during entering of the lance and outputting the collected data to the outside so that whether the birds nest of the dead man coke generated in front of the tuyere of the blast furnace is formed or not is detected as the thrust resistance of the lance(12) is being changed, wherein the lance driving part(15) comprises an air motor(18), a plural driving base guides(30), and a driving base upper plate(25) and a rack gear(27), wherein the thrust measuring part(40) comprises an admission distance measuring part(60) equipped with an encoder(62), a roller mounted on the shaft of the encoder(62), a control computer(42) connected to the encoder(62), a lance connecting hollow socket(52), an air purge line(54) and a female screw part.
Patent KR-20030049297-A (KR)
Inventor: PARK JONG MIN
IPC: C21C5/30
Filed: 2001-12-14
Abstract: PURPOSE: A method for dephosphorizing molten steel in converter steel making is provided, which is characterized in that lime stone powder is injected into molten steel being laden in oxygen stream flowing through oxygen lance. CONSTITUTION: In a dephosphorization method where oxygen is injected into molten steel (2) in converter (1) and powdery dephosphorizer is injected into the molten steel being carried in oxygen stream, the method is characterized in that lime stone powder with a particle size distribution ranging from 0.1 to 1.0 mm is injected in an amount of less than 2.5 kg/t·molten steel/min into molten steel.
Patent KR-20030049631-A (KR)
Title: Temperature control apparatus for charcoal of canister
Inventor: AHN CHEOL JUN
IPC: F02M25/08
Filed: 2001-12-17
Abstract: PURPOSE: A charcoal temperature controller of a canister is provided to improve the fuel evaporative gas absorbing and removing performance by controlling the temperature of the charcoal received in a canister. CONSTITUTION: A charcoal heat sink has a main plate with many sub-plates and a fixing piece(33) protruded out of a housing(21). A radiator supported on the housing makes a movable piece(42) and the fixing piece exchange heat. A diaphragm(50) contracts and expands depending on the temperature of charcoal in the housing. An operating bar(60) hinge-coupled to a bracket(62) operates the movable piece. A motor-driven push rod(72) pushes the movable piece by the operation of a motor-driven valve(70).
Patent KR-20030050179-A (KR)
Title: Method for forming a dual gate insulation
Inventor: KWON JAE SUN
IPC: H01L21/8224
Filed: 2001-12-18
Abstract: PURPOSE: A method for forming a dual gate oxide layer is provided to prevent tunneling of the dual gate oxide layer and overcome the limit of its thickness by a growing process of thermal oxide for high reliability and Ta2O5 forming process for high speed. CONSTITUTION: A nitride layer(33) is formed on a semiconductor substrate(31) on which the first region(I) required to have high reliability and the second region(II) required to high speed are defined. A dielectric layer having a higher permittivity compared to the nitride layer is formed on the nitride layer. The dielectric layer and nitride layer of the second region are etched. An oxide layer(39) is grown on the second region of the semiconductor substrate. A Ta2O5 layer(35) is formed on the dielectric layer. The Ta2O5 layer is etched by a wet etching process using mixed solution of H3PO4 and HF.
Patent KR-20030050189-A (KR)
Title: An apparatus equiped in driving room that supports driver's protector
Inventor: JO CHUN HO
IPC: B62D25/08
Filed: 2001-12-18
Abstract: PURPOSE: A device for supporting load of a falling-over protective structure installed to a cab is provided to sharply reduce the installation cost by facilitating the installation work, facilitate the assembling and removing of the falling-over protective structure, and improve driver's visibility after washing the windshield. CONSTITUTION: A device for supporting load of falling-over protective structures(4a,4b) installed to a cab(3) has an upper frame(1) mounted to a base carrier; the cab mounted to the upper frame; vibration-absorbing devices(6,6a) installed between the upper frame and a bottom plate(5) of the cab; and the falling-over protective structure installed to the cab to secure driver's safety. The device for supporting load of the falling-over protective structure has a first stopper(10) formed to the rear side of the bottom plate, and a second stopper(11) fixed to the front of the bottom plate. The first stopper supports vertical movement of the cab and restricts the horizontal movement of the cab, when load is given to the cab from the outside. The second stopper supports the vertical movement of the cab and restricts the coming-off of the cab caused by turn, when load is given to the cab from the outside.
Patent KR-20030050559-A (KR)
Title: A Dielectric Composition Having Low Dielectric Constant And A Multi Layered Ceramic Capacitor Prepared By Using The Same
Inventor: CHOI TAE WON
IPC: C04B35/468
Filed: 2001-12-19
Abstract: PURPOSE: A dielectric magnetic composition and a multilayered ceramic capacitor prepared by using the composition are provided, to increase the multilayered number and the overlapped part of printed layer in producing a low capacitance multilayered ceramic capacitor, thereby improving the electrostatic capacitance and reducing the equivalent series resistance. CONSTITUTION: The dielectric magnetic composition comprises a compound represented by aBaTiO3-bMgCO3-cMnO2-dY2O3-eCr2O3-fPe-gBaxCa(1-x)SiO3, wherein Pe is at least one paraelectrics selected from the group consisting of SrZrO3, SrTiO3, CaTiO3 and CaZrO3; 0.2<= b<=6.0, 0.05<=c<=1.5, 0.05<=d<=2.0, 0.05<=e<=0.5, 5<=f<=30, and 0.5<=g<=3 when a=100; and x is 0.4-0.5. Preferably the composition comprises further up to 2 mol of V2O3, up to 10 mol of R2O3 or their mixture per 100 mol of BaTiO3, wherein R is at least one rare earth element selected from the group consisting of Er, Yb, La and Dy.
Patent KR-20030052405-A (KR)
Inventor: CHO JUN SEONG
IPC: B21D28/00
Filed: 2001-12-21
Abstract: PURPOSE: A blank method for a deep drawing process is provided to improve a usage rate of a plate when processing a vessel by changing a shape of a blank when blanking the plate. CONSTITUTION: Metal plates(20) are formed into at least two rows of polygonal blank plates(22). The polygonal blank plates(22) are formed into circular blank plates(24) by using a circular pressing. A plurality of dies are aligned in series in such a manner that diameter of holes formed in dies is gradually reduced. Then, the circular blank plates(24) sequentially pass through the holes formed in the dies so as to form a plurality of cylindrical vessels. The polygonal blank plates(20) include pentagonal blank plates or hexagonal blank plates.
Patent KR-20030055724-A (KR)
Inventor: PARK TAE BYEONG
IPC: F24F1/00
Filed: 2001-12-27
Abstract: PURPOSE: A control box assembly of an air conditioner is provided to minimize size of the control box assembly and the air conditioner. CONSTITUTION: A control box assembly(80) comprises a PCBs(Printed Circuit Board) having electronic components built thereon for operation of an air conditioner; a control box main body(90) receiving the PCB on a front side thereof; a capacitor(102) installed on one side of a rear side of the control box main body to impress constant voltage to a motor; and a high voltage generator(108) installed on the other side of the rear side of the control box main body to impress high voltage to an electric dust collector. The control box assembly includes a motor cover(59) formed separately from the control box main body to protect the motor. The motor cover has hooks(59a) formed on both sides of one side thereof to be inserted to a chassis, and bosses with screw holes formed on the other side thereof to be fixed to the chassis by screws. The PCB is divided into an A/C PCB(82) having A/C electric components built thereon and installed in the control box main body, and a D/C PCB(84) having D/C electric components built thereon and installed on a front side of the control box main body.
Patent KR-20030056790-A (KR)
Title: Writing Meterials Having Secret Memo and Read Function
Inventor: CHEON DEUK PIL
IPC: B43K29/12
Filed: 2001-12-28
Abstract: PURPOSE: A writing instrument with secret memo writing and reading functions is provided to improve the convenience of use and storage thereof, and to eliminate any economical burden and troublesome caused by purchase and management of a separate ultraviolet emitting device. CONSTITUTION: The writing instrument(13), adopting a fluorescent pigment contained in the lower portion of a body(11) thereof, comprises a battery(21), a switch(22), an ultraviolet luminous diode(20), and a luminous member(19), which are installed in the upper portion of the body. The fluorescent pigment is contained in a cartridge(16) or a transparent storage pipe provided in the instrument. The writing instrument further contains a transparent fluorescent stick formed by mixing the fluorescent pigment to a known mixture consisting of solid hardened oil, stearin acid, magnesium carbonate, and vegetable oil.
Patent KR-20030055072-A (KR)
Inventor: RUE MYOUNG SOON
IPC: G09B19/00
Filed: 2001-12-24
Abstract: PURPOSE: A recording medium for use in an automatic character memorizing combined with a function of developing a genius child is provided to reduce the time required for learning characters by stimulating the five senses of child. CONSTITUTION: A first recording medium(1) stores large-scale characters in order to facilitating the learning of a learner. A second recording medium(2) stores the whole characters stored on the first recording medium(1) as images. A third recording medium(3) stores the whole characters as a story with the images. A fourth recording medium(4) stores the story with narration and plays the story repetitively in order to allow the leaner to pronounce the characters. A fifth recording medium(5) induces the learner to pronounce the characters upon listening the story. A sixth recording medium(6) provides the whole characters stored on the first recording medium(1) as sound according to the narration.
Patent KR-20010086400-A (KR)
IPC: G06F12/00
Filed: 1999-05-13
Abstract: 본 발명은 전원 차단 시에도 데이터를 보유하는 기능을 갖는 메모리를 관리 대상으로 하여, 호스트가 발행하는 논리 어드레스가 가리키는 데이터의 저장처가 되는 메모리 영역의 식별자 정보를 관리하는 메모리 관리 테이블의 작성 처리를 담당하는 메모리 관리 테이블 작성 방법에 관한 것으로, 초기 설정을 행한 후, 메모리 관리 테이블을 작성하지 않고 즉시, 호스트 장치에 비지 해제를 통지하거나, 메모리 관리 테이블의 일부분만을 작성하여 호스트 장치에 비지 해제를 통지하고, 그 후, 호스트 장치가 처리 요구를 발행할 때까지의 동안 메모리 관리 테이블의 미작성 부분을 작성하거나, 호스트 장치가 처리 요구를 발행할 때 그 처리 요구로 지정되는 논리 어드레스가 가리키는 메모리 관리 테이블의 미작성 부분을 작성함으로써 메모리 관리 테이블을 작성하도록 구성한다.
Patent KR-20010080514-A (KR)
Title: Method, base station and subscriber station for channel coding in a gsm mobile radiotelephone system
IPC: H04B7/26
Filed: 1999-11-19
Abstract: A method, base station and subscriber station which use recursive systematic codes (RSC codes) for channel coding in GSM mobile radio systems. In addition, these RSC codes also can be used on the basis of the hardware installed in existing GSM mobile radio systems. The RSC codes can be introduced during the introduction of an adaptive multirate coder.
Patent KR-20010082374-A (KR)
IPC: H01J11/34
Filed: 2000-10-18
Abstract: 본 발명은 복잡한 피도포면의 형상을 갖는 PDP의 배면 패널에 있어서도   형광체의 혼색을 방지하면서 복수개의 형광체잉크를 라인형상으로 도포할 수 있는 형광체잉크 도포장치를 제공하는 것을 목적으로 한다. 
     이를 위해 형광체잉크 도포장치의 각 노즐구멍(752)마다 밸브(753)를 설치하고 피도포면의 잉크도포 예정부위의 형상에 따라서 각 밸브의 개폐를 제어하는 것으로 하였다. 이로써 보조격벽이 있는 바와 같은 복잡한 형상을 갖는 배면 패널에 있어서도 혼색을 방지할 수 있다.
Patent KR-20010101586-A (KR)
Title: Turning of a propulsion unit
IPC: B63H25/34
Filed: 2000-01-18
Abstract: The present application is a method and apparatus for moving and steering a vessel traveling in water. The arrangement for moving and steering a vessel includes a propulsion unit having a chamber positioned outside the vessel equipment for rotating a propeller arranged in connection with the chamber, and a shaft means connected to the chamber for supporting the chamber in a rotatable manner at the hull of the vessel. At least one hydraulic motor if used for turning the shaft means in relation to the hull of the vessel for steering the vessel. The arrangement also includes a means for altering the rotational displacement of the hydraulic engine.
Patent KR-20010102102-A (KR)
IPC: G02B6/43
Filed: 2000-11-02
Abstract: 본 발명은 도파관 및 광 신호 통신용 도파관 제조 방법에 관한 것이다.  도파관 구조는 표준 CMOS 제조 공정을 사용하여 제조되고 디지털 CMOS 회로를 갖는 동일한 칩에 통합된다.  도파관 제조의 예시적 방법은 유전체 층을 통해 기판으로의 컨택트를 형성하고 컨택트의 측벽을 제 1 금속 코팅으로 코팅하는 단계를 포함한다.  그런 다음, 컨택트를 유전체 재료로 충진한다.  부분적인 도파관 구조를 도파관 유전체 구조와 그 도파관 유전체 구조 위에 규정된 제 2 금속 코팅에 의해 형성한다.  제 3 금속 코팅이 형성되어 부분적인 도파관 구조, 제 1 금속 코팅 및 제 2 금속 코팅의 측면을 따라 스페이서를 규정한다.  제 3 금속 코팅은 도파관 유전체 구조로 충진되는 도파관 구조를 완성하도록 형성된다.  그러고 나서, 광 신호는 도파관 구조를 통해 전파하되 다른 CMOS 디지털 회로와 접속될 수 있다.
Patent KR-20020063495-A (KR)
IPC: A45D2/00
Filed: 2001-02-01
Abstract: A hair styling device for twirling locks of hair together including a main body, and at least two hair grabbers for respectively grabbing separate locks of hair. Each of the hair grabbers is connected to respective hair twisters, and each of the hair twisters rotates respective locks of hair to form twists of hair. The device further comprises a hair twist rotator body connected to each of the hair grabbers. The hair twist rotator body is connected to and rotatable relative to the main body. Rotation of the hair twist rotator body cables the twists of hair to form a cord of hair. The hair grabbers are substantially stationary relative to the hair twist rotator when the hair twist rotator rotates relative to the main body.
Patent KR-20020005677-A (KR)
IPC: B25B27/00
Filed: 2000-03-22
Abstract: 백업링(80) 및 오링(82)을 글랜드(90) 내로 삽입하기 위한 삽입 공구(10). 상기 공구는 백업링 및 오링을 수용하기 위한 리세스(38)를 가지는 몸체를 포함한다. 또한, 상기 공구는 몸체에 인접한 상태로 이동할 수 있게 설치된 푸셔(50)를 포함한다. 상기 푸셔는 제1 방향(58) 및 제2 방향(60)으로 이동할 수 있다. 푸셔는 백업링 및 오링을 제1 방향으로 당기기 위한 당김 장치를 포함한다. 또한, 푸셔는 백업링 및 오링을 제2 방향으로 밀어 글랜드 내로 들어가게 하기 위한 밀침 장치를 포함한다.
Patent KR-20020005711-A (KR)
IPC: G11B7/24
Filed: 2000-04-22
Abstract: An optical storage medium comprises cover films, storage layers and a base member which are laminated by means of light transmissive pressure sensitive adhesive layers. An optical storage medium (I), from which information may be read and/or into which information may be recorded with a light beam (6), comprises at least one base member (1) on which the light beam (6) is incident, at least one information storage layer (3) and at least one light transmissive cover film(5). The cover films (5) are bonded to each other, to the surface of the base members (1) and/or to one or more information storage layers (3) by means of one or more light transmissive pressure-sensitive adhesive layers (4). An independent claim is included for a method for the preparation of (I) by providing at least one base member (1) having a surface (2) on which the light beam (6) is incident and comprising a structure of pits bearing an information storage layer (3); laminating a laminate comprising at least one cover film (5), the inner surface of which optionally comprises a structure of pits bearing an information storage layer (3) and a releasable protective film (7) with a laminate comprising at least one pressure-sensitive adhesive layer (4) and a release liner (8) between 2 rollers; removing the release liner (8) to provide a bondable laminate; and laminating the laminate (12) to the surface (2) of the information storage layer (3) on the surface (2) of the base member (1).
Patent KR-20020007386-A (KR)
IPC: F01N3/10
Filed: 2000-04-18
Abstract: 본 발명은 배기 가스의 처리에 있어서 NO x 트랩으로서 사용할 수 있는 조성물에 관한 것이다.  상기 조성물은 지지체 및 활성상을 포함하고, 상기 활성상이 알칼리-토금속 및 희토류 금속 중에서 선택된 하나 이상의 원소 A 및 망간을 기재로 하며, 800℃에서 8시간 동안 하소한 후 비표면적이 10 m 2 /g 이상이거나 이상일 수 있는 것을 특징으로 한다.  상기 지지체는 알루미나, 또는 실리콘, 지르코늄, 바륨 또는 희토류 금속으로 안정화된 알루미나를 기재로 할 수 있거나, 실리카 또는 실리카 및 티타늄 산화물을 기재로 할 수 있다.
Patent KR-20020027341-A (KR)
IPC: A61B17/34
Filed: 2000-06-08
Abstract: 본 발명은 인체를 통해 의료 기구를 선택적으로 주입하기 위하여 그리고 인체 내로 보조 루멘을 동시에 제공하기 위하여 인체 내로 단일 입구 포트를 제공하는데 사용되는 다중 루멘 접근 장치에 관한 것이다.  다중 루멘 접근 장치는 다중 루멘 외피를 포함하며, 이 다중 루멘 외피는 안에 위치된 장치 루멘을 한정하는 외부관 및 구조를 가진다.  루멘 구조는 내벽 또는 루멘이다.  외부관 및 내부 구조는 적어도 하나의 보조 루멘을 한정하도록 위치된다.  실시예들은 장치 루멘 및 보조 루멘의 상당한 단면적이 가변되는 이완된 위치와 팽창/수축된 위치 사이에서 구부러질 수 있는 가요성 내벽을 포함한다.  접근 장치는 장치 루멘을 밀봉시키는 밸브를 더 포함한다.  밸브는 루멘 접합 하우징 내에 구비되거나 또는 장치 루멘과 영구적으로 또는 제거 가능하게 연결된 하우징으로부터 분리될 수 있다.  변형적으로, 다중 루멘 외피는 밸브를 통해 종래의 주입기까지 통과될 수 있다.  밸브는 또한 강성 삽입체로서 분리되어 사출 성형되어 가요성의 접합 하우징 내에 형성된 공동 내에 보유될 수 있다.  다른 실시예에서, 다중 루멘 접근 장치는 긴 기구의 주입에 의해 관형의 단일 루멘 외피 내에 동축으로 형성되어 있다.
Patent KR-20020009639-A (KR)
Inventor: SEO IN CHEOL
IPC: B60Q5/00
Filed: 2001-12-31
Abstract: PURPOSE: A safety system of a vehicle is provided to realize a safe travel by promptly and accurately informing the traffic and road conditions to other drivers using visual and audio signals. CONSTITUTION: A safety system of a vehicle comprises a visual signal unit, an audio signal unit, a steering angle indication unit, and an automatic brake unit. The visual signal unit consists of a diode bulb(4), a danger indicator(5) and a strobe light(6). The audio signal unit consists of a horn(8) generating a siren. The steering angle indicator indicates a steering angle by calculating the rotating angle of a steering wheel using the diameters of pulleys. The automatic brake unit uses a solenoid valve and a booster cylinder. The intention of a driver is promptly and accurately transmitted to the other drivers via the audio and visual signal units. Thus, the drivers cope with an accident on a road. The driver recognizes the state of tires and easily manipulates a steering system. Therefore, a safe travel is realized.
Patent KR-20020081051-A (KR)
Title: The slag reducing agent for injection
Inventor: PARK TAE JU
IPC: C21C7/076
Filed: 2002-01-16
Abstract: PURPOSE: A powdery slag reducing agent that is injected to interface between molten steel and slag is provided to effectively reduce chromium from slag into molten steel, thus preventing dust scatter. CONSTITUTION: The slag reducing agent for steelmaking comprises 40 to 60 wt.% of aluminum powder with a purity of higher than 90 %; 20 to 30 wt.% of ferro-silicon powder; and 10 to 40 wt.% of silicon carbide powder. The particle size of the aluminum powder, ferro-silicon powder and silicon carbide powder is 0.5 to 3 mm.