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公开(公告)号：KR1020050004996A
公开(公告)日：2005-01-13
申请号：KR1020030044110
申请日：2003-07-01
Applicant: 한국에너지기술연구원
IPC: H01M4/86
Abstract: PURPOSE: Provided is a method for manufacturing a cathode support for a solid oxide fuel cell that has excellent mechanical strength while maintaining porosity and shows high electroconductivity. CONSTITUTION: The method for manufacturing a high-strength cathode support for a solid oxide fuel cell comprises the steps of: mixing 35-55 vol% of nickel oxide powder, 45-65 vol% of yttria-stabilized zirconia and 30-45 vol% of a pore generator, mixing the resultant mixture with molding aids including 1-15 wt% of a binder, 1-10 wt% of a plasticizer, 1-5 wt% of a dispersant and 1-3 wt% of a release agent, wet mixing the resultant mixture with an alcohol, and then aging the mixture; molding the aged materials into a cathode support; and baking the molded cathode support at a temperature of 1300-1500 deg.C.
Abstract translation: 目的：提供一种固体氧化物型燃料电池用阴极支撑体的制造方法，其具有优异的机械强度，同时保持孔隙率并且显示出高的导电性。 构成：制造用于固体氧化物燃料电池的高强度阴极支撑体的方法包括以下步骤：将35-55体积％的氧化镍粉末，45-65体积％的氧化钇稳定的氧化锆和30-45体积％ 的孔发生器，将所得混合物与模塑助剂混合，所述模塑助剂包括1-15重量％的粘合剂，1-10重量％的增塑剂，1-5重量％的分散剂和1-3重量％的脱模剂， 将所得混合物用醇湿混合，然后使混合物老化; 将老化的材料成型为阴极支撑体; 并在1300-1500℃的温度下烘烤成型的阴极支撑体。
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公开(公告)号：KR1020020068935A
公开(公告)日：2002-08-28
申请号：KR1020010009363
申请日：2001-02-23
Applicant: 한국에너지기술연구원
IPC: B01D39/20
CPC classification number: B01D39/2075 , B01D2239/0471 , B01D2239/10 , C04B35/565 , C04B35/64
Abstract: PURPOSE: A fabrication method of silicon carbide ceramics filters on the outer surface of which a coating layer is formed is provided to improve dust collection efficiency. CONSTITUTION: The fabrication method of silicon carbide ceramics filter includes the steps of mixing silicon carbide ceramics powder 100 vol.%, 0.1 to 30.0 vol.% of carbon powder (based on the 100 volume percent of silicon carbide ceramics powder), 1.0 to 15.0 wt.% of inorganic binder (based on the 100 weight percent of silicon carbide ceramics powder), 3.0 to 20.0 wt.% of organic binder, 0.1 to 5.0 wt.% of calcium carbonate, 0.1 to 15.0 wt.% of dispersant, 0.1 to 3.0 wt.% of releasing agent and 10.0 to 35.0 wt.% of water; aging the mixture; pressure extruding the mixture in the form of filter; coating the surface of the filter by spray coating a coating solution; and sintering the coated filter. The coating solution comprises, based on the 100 parts by weight of silicon carbide ceramics powder, 0.5 to 15.0 wt.% of clay, 0.1 to 5.0 wt.% of calcium carbonate, 0.1 to 5.0 wt.% of carboxymethylcellulose, 0.1 to 5.0 wt.% of dispersant, 0.1 to 3.0 wt.% of defoaming agent and 150 to 250 wt.% of water. The sintering process includes the steps of heating the coated ceramic filter up to 800°C at temperature elevation rate of 1 to 2 °C/min; holding it at 800°C for 1-6 hours; heating the coated ceramic filter in the temperature range of 1000 to 1800°C at temperature elevation rate of 4°C/min; holding it at 1000-1800°C for 1-10 hours; and cooling to ambient temperature at a cooling rate of 5°C/min.
Abstract translation: 目的：提供在其外表面上形成涂层的碳化硅陶瓷过滤器的制造方法，以提高灰尘收集效率。 构成：碳化硅陶瓷过滤器的制造方法包括将碳化硅陶瓷粉末100体积％，碳粉0.1〜30.0体积％（碳化硅陶瓷粉末的100体积％）混合，1.0〜15.0 无机粘合剂的重量百分比（基于100重量％的碳化硅陶瓷粉末），3.0-20.0重量％的有机粘合剂，0.1-5.0重量％的碳酸钙，0.1-15.0重量％的分散剂，0.1 至3.0重量％的脱模剂和10.0至35.0重量％的水; 老化混合物; 以过滤器的形式挤压混合物; 通过喷涂涂层溶液涂覆过滤器的表面; 并烧结涂层过滤器。 涂布溶液基于100重量份的碳化硅陶瓷粉末，含有0.5〜15.0重量％的粘土，0.1〜5.0重量％的碳酸钙，0.1〜5.0重量％的羧甲基纤维素，0.1〜5.0重量％ 的分散剂，0.1〜3.0重量％的消泡剂和150〜250重量％的水。 烧结过程包括以1至2℃/ min的升温速率将涂覆的陶瓷过滤器加热至800℃的步骤; 在800℃保持1-6小时; 在1000〜1800℃的温度范围内以4℃/ min的升温速度加热涂覆的陶瓷过滤器; 在1000-1800℃保持1-10小时; 并以5℃/ min的冷却速度冷却至环境温度。
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公开(公告)号：KR1020020067257A
公开(公告)日：2002-08-22
申请号：KR1020010007749
申请日：2001-02-16
Applicant: 한국에너지기술연구원
IPC: C04B35/573
CPC classification number: C04B35/573 , C04B35/563 , C04B35/62695 , C04B35/64 , C04B2235/3821 , C04B2235/3826
Abstract: PURPOSE: A method for manufacturing silicon carbide-boron carbide composites by liquid phase reaction sintering is provided which can compensate strength/hardness reduction due to free silicone in silicon carbide-boron carbide composite produced by liquid phase reaction sintering. CONSTITUTION: The manufacturing method of silicon carbide-boron carbide composites by liquid phase reaction sintering includes the steps of (i) adding 5-40 wt.% of boron carbide(B4C) to an admixture comprising 80-95 wt.% silicon carbide and 5-20 wt.% carbon powder followed by mixing, wherein the silicon carbide is composed of coarse particle and fine particle in a ratio of 7:3, and the carbon powder is carbon black having mean particle size of less than 1μm; (ii) adding 1-2 wt.% of organic binder to the mixture obtained in the first step followed by granulating above mixture with a sieve having 50-100 mesh size; (iii) pressing the granulated mixture by uniaxial pressing at 300-500Kg/cm¬2; and (iv) sintering process. The sintering process is characterized in that above formed mixture is heated up to 600 deg.C at a temperature rising rate of 1 to 2 deg.C/min under decompressed atmosphere of 10¬-1 to 10¬-2 torr and then holding the temperature for 1 hour; sequentially it is heated to temperature ranges of 1,550 to 1,600°C at a temperature rising rate of 5 deg.C/min and then holding the temperature for a certain period of time; and finally it is heated up to 1,700°C.
Abstract translation: 目的：提供一种通过液相反应烧结制造碳化硅 - 碳化硼复合材料的方法，其可以补偿由液相反应烧结制备的碳化硅 - 碳化硼复合材料中的游离硅氧烷的强度/硬度降低。 构成：通过液相反应烧结制造碳化硅 - 碳化硼复合材料的方法包括以下步骤：（i）将5-40重量％的碳化硼（B4C）加入到包含80-95重量％的碳化硅和 5-20重量％的碳粉末，然后混合，其中碳化硅由比例为7:3的粗颗粒和细颗粒组成，碳粉是平均粒度小于1μm的炭黑; （ii）在第一步骤中获得的混合物中加入1-2重量％的有机粘合剂，然后用具有50-100目尺寸的筛子将上述混合物造粒; （iii）以300-500Kg / cm 2的单轴压制压制造粒混合物; 和（iv）烧结工艺。 烧结过程的特征在于，将上述形成的混合物在10-1-10 -2托的减压气氛下以1至2℃/ min的升温速率加热至600℃，然后将 温度1小时; 依次加热至1550〜1600℃的温度范围，升温速度为5℃/分钟，然后保温一定时间; 最后加热到1700℃。
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公开(公告)号：KR100308922B1
公开(公告)日：2002-04-24
申请号：KR1019980049980
申请日：1998-11-20
Applicant: 한국에너지기술연구원
IPC: C04B35/584 , C04B35/565
Abstract: 본 발명은 내열충격성과 내식성 및 강도특성이 우수하여 고로용과 금속 용탕용의 내식성 내화재료등에 사용될 수 있도록 실리콘의 질화반응에 의하여 질화규소 결합 탄화규소계 복합재료의 제조방법에 관한 것이다. 종래의 질화규소 결합 탄화규소계 복합재료의 제조방법에 있어서 질화반응의 불균일에 의한 잔류 실리콘의 과다 존재와 이로 인한 소결체의 밀도, 강도 및 내식성이 저하되고 장시간의 질화반응으로 인해 생산단가가 높아지지만 본 발명은 핵형성제를 사용하여 이러한 문제점을 해결하였다.
본 발명의 복합재료는 60∼90중량%의 탄화규소와 10∼40중량%의 실리콘 그리고 핵형성제로 1∼5중량%의 질화규소를 기본 조성물로 하였다. 이들 조성물에 유기바인더를 결합제로 혼합해서 일정 형상으로 성형하고 건조시킨 후, 질소 분위기와 900℃ 온도범위에서 2∼5시간 동안 예비 열처리하여 바인더를 제거한 후, 1,300∼ 1,450℃ 온도범위에서 1∼30시간 동안 소결하여 실리콘의 질화반응을 균일하게 촉진시켜 질화규소로 존재시키고, 잔류하는 실리콘량을 최소화하여 5OMPa 이상의 고강도를 나타내는 질화규소 결합 탄화규소계 복합재료를 제조하는데 있다.-
公开(公告)号：KR100299099B1
公开(公告)日：2001-09-13
申请号：KR1019990015659
申请日：1999-04-30
Applicant: 한국에너지기술연구원
IPC: C04B35/565 , C04B35/573
Abstract: 본발명은액상반응소결(Liquid Phase Reaction Sintering)법과탄화규소 (SiC) 세라믹스를이용하여화학펌프, 마그네틱펌프및 송풍기에사용하는세라믹밀봉재(Ceramics Seal)의제조방법에관한것이다. 본발명은 95∼85 중량의탄화규소에 5∼15 중량의탄소를기본조성으로하여유기바인더를성형보조제로첨가하고이들을혼합하여실온에서 800℃까지 1∼2℃/분의느린속도로승온시켜성형체에결함이생성시키지않도록하고바인더를제거하기위하여열처리한후, 1,600∼1,700℃의온도범위에서 0.5∼1시간동안반응소결하여탄화규소세라믹밀봉재를제조한다. 본발명은기공이없이치밀하며, C-ring 강도 400 MPa 이상, 경도 2,000 kg/mm이상을갖는탄화규소세라믹밀봉재소결체의제조하는것을목적으로한다.
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Patent Agency Ranking
公开(公告)号：KR1020000067656A
公开(公告)日：2000-11-25
申请号：KR1019990015659
申请日：1999-04-30
Applicant: 한국에너지기술연구원
IPC: C04B35/565 , C04B35/573
CPC classification number: C04B35/64 , B28B1/265 , C04B35/573 , C04B35/632 , C04B2235/422 , C04B2235/656
Abstract: PURPOSE: A manufacturing method of SiC ceramic seal by liquid phase reaction sintering is provided, which gives excellent abrasion-resistance, hardness and heat-resistance. CONSTITUTION: The manufacturing method of SiC ceramic seal comprises the steps of: preparing 85-95 wt.% of SiC powders containing coarse and fine powders and 5-15 wt.% of C powders containing graphite and carbon black powders and then vibration pot milling for 30 min.; mixing with 1-2 wt.% (based on the weight of mixed SiC+C powders) of an organic binder such as carboxymethyl cellulose (CMC) or polyvinyl pyrollidone (PVP); forming with 300-500 kg/cm¬2 by uniaxial pressing; heat treating at 800°C for 1 hour; sintering it up to 1550-1600°C elevating by 5°C/min and then maintaining the temperature for 1 hour. The sintered ceramic seal having more than 400 MPa of C-ring strength and more than 2000 kg/mm2 of hardness is used for chemical pumps, magnetic pumps and fans.
Abstract translation: 目的：提供通过液相反应烧结制造SiC陶瓷密封的方法，具有优异的耐磨性，硬度和耐热性。 构成：SiC陶瓷密封件的制造方法包括以下步骤：制备85-95重量％的含有粗粉末和细粉末的SiC粉末和5-15重量％的含石墨和炭黑粉末的C粉末，然后振动锅铣 30分钟。 与有机粘合剂如羧甲基纤维素（CMC）或聚乙烯基吡咯烷酮（PVP）的1-2重量％（基于混合SiC + C粉末的重量）混合; 通过单轴压制成型为300-500kg / cm 2; 在800℃下热处理1小时; 将其烧结至1550-1600℃，升高5℃/ min，然后保持温度1小时。 具有超过400MPa的C环强度和大于2000kg / mm 2的硬度的烧结陶瓷密封件用于化学泵，磁力泵和风扇。
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公开(公告)号：KR100262450B1
公开(公告)日：2000-08-01
申请号：KR1019970072892
申请日：1997-12-24
Applicant: 한국에너지기술연구원
IPC: C23C26/00
Abstract: PURPOSE: An electrical insulation coating method is provided in which the surface of a metallic thin plate is uniformly coated, flexibility of the coating layer is maintained due to the thin coating thickness, cracks are not formed during manufacturing a round shaped product, and costs required in coating are less while cracks are not generated during drying and firing. CONSTITUTION: The method for electrical insulation coating an electric heating catalyst comprises the processes of preparing a coating solution by using an alumina sol as a coating material paying a part as an electric insulation raw material as well as a binder and adding ethyl alcohol as a diluent to the alumina sol; immediately drying the dipped metallic thin plate using a hot air dryer by taking out the same from the coating solution after dipping a metallic thin plate into the prepared coating solution for one minute; completely fusing the coating layer onto a metallic thin plate after putting the dried plate into an electric furnace which is maintained to 900 deg.C for 10 to 20 minutes; and repeating the above processes 3 to 4 times so that a thickness of the coating layer becomes 5 to 8 microns.
Abstract translation: 目的：提供一种电绝缘涂层方法，其中金属薄板的表面均匀地涂覆，由于薄的涂层厚度，保持涂层的柔韧性，在制造圆形产品期间不形成裂纹，并且需要成本 在干燥和焙烧期间不产生裂纹的涂层较少。 构成：电加热催化剂的电绝缘涂覆方法包括以下方法制备涂布溶液：使用氧化铝溶胶作为负载作为电绝缘原料的部件的涂料以及粘合剂，并加入乙醇作为稀释剂 到氧化铝溶胶; 在将金属薄板浸入制备的涂层溶液中1分钟后，使用热空气干燥器立即干燥浸渍的金属薄板，从涂布溶液中取出; 将干燥的板放入保持在900℃的电炉中10-20分钟后，将涂层完全熔合到金属薄板上; 并重复上述处理3至4次，使得涂层的厚度变为5至8微米。
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公开(公告)号：KR100153416B1
公开(公告)日：1998-11-16
申请号：KR1019940019684
申请日：1994-08-10
Applicant: 한국에너지기술연구원
IPC: C23D5/00
Abstract: 본 발명은 특허 제42876호(공고번호 91-9144) 내열, 내수성이 우수한 무기도장재의 조성물의 이용 및 그 용도 발명으로서 차량용 머플러에 피막시킨 코팅머플러에 관한 것으로서, 내열골재로서 실리카 3-7 wt%, 산화티타늄 8-13wt%, 경화재로서 19-23wt%, 결합재로서 규산소다 34-38wt%로 조성된 무기도장재를 슬립상태로하여 자동차용 머플러에 대하여 시유한후 건조, 가열 경화시킨 것을 특징으로 하는 내열, 내수성이 우수한 무기도장재의 조성물을 차량용 머플러에 피막시킨 코팅 머플러.
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公开(公告)号：KR100138673B1
公开(公告)日：1998-04-27
申请号：KR1019950046139
申请日：1995-12-02
Applicant: 한국에너지기술연구원
IPC: C04B35/468
Abstract: 본 발명은 큐리온도에서 저항이 급격히 증가하는 PTCR 특성을 갖는 반도성 BaTiO₃세라믹스를 저온에서 제조하기 위하여 BaTiO₃에 Sb2O
3 를 0.05 - 0.125 mol% 첨가하여 절연성 BaTiO
3 세라믹스를 1300℃부터 소성하여 반도성 BaTiO₃세라믹스로 제조하고 또 BN을 0.01 - 5 wt%첨가하여 절연성 BaTiO₃세라믹스를 1140℃부터 소성하여 반도성 BaTiO₃세라믹스로 제조하는 것이다.-
公开(公告)号：KR1019970011767A
公开(公告)日：1997-03-27
申请号：KR1019950026360
申请日：1995-08-24
Applicant: 한국에너지기술연구원
Abstract: 본 발명은 세라믹전열관의 교체가 가능한 세라믹관형 열교환기와 그 교체방법에 관한 것으로서, 세라믹전열관이 삽입구멍을 형성한 공기출구측 헤더블럭과 세라믹전열관의 수만큼 구멍이 뚫리고 안쪽에 세라믹페이퍼가 부착된 금속재 경판과, 헤더블럭과 금속재 경판을 통과시킨 세라믹전열관을 고정시키는 후렌지로 구성되어 세라믹전열관을 조립 및 교환할수 있게 한 것이다.
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