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公开(公告)号：KR1020020026019A
公开(公告)日：2002-04-06
申请号：KR1020000057582
申请日：2000-09-30
Applicant: 한국화학연구원 , 한화케미칼 주식회사
IPC: B22F9/16
Abstract: PURPOSE: A method for preparing super-fine metal powder is provided in which metal powder having a small and uniformed size less than 1 micron are obtained, particles of the metal powder are not coagulated, and dispersing, crushing and mixing properties of dried powder are superior. CONSTITUTION: In a method for preparing metal powder by adding a reducing agent selected from formaldehyde, hydrazine and hydrazine hydrate to the solution after controlling an aqueous metal salt solution prepared by adding soluble metal salts to water to pH 10 or more, the method for preparing super-fine metal powder is characterized in that soluble metal salts are added to a micro emulsion in which one or more non-aqueous solvents selected from water and acetone, ether and tetrahydrofuran instead of water are contained in a weight ratio of 20 to 99/1 to 80, wherein the soluble metal salts contain metal ions selected from silver, nickel, copper, gold, cobalt and palladium, and are selected from nitrate, sulfate, carbonate or chloride, and a pH of the metal salt solution is controlled by a pH control agent selected from ammonia water, amines, ammonium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide and barium hydroxide.
Abstract translation: 目的：提供一种制备超细金属粉末的方法，其中获得具有小于1微米的均匀尺寸的金属粉末，金属粉末的颗粒不凝结，并且干粉的分散，破碎和混合性能为 优越。 构成：在控制通过向水中添加可溶性金属盐制备的含水金属盐溶液至pH 10以上之后，通过将选自甲醛，肼和水合肼的还原剂加入到溶液中的方法中，制备金属粉末的方法 超细金属粉末的特征在于将可溶性金属盐加入到微乳液中，其中以水和丙酮，乙醚和四氢呋喃代替水中的一种或多种非水溶剂的重量比为20-99 / 1〜80，其中可溶性金属盐含有选自银，镍，铜，金，钴和钯的金属离子，并且选自硝酸盐，硫酸盐，碳酸盐或氯化物，金属盐溶液的pH由 选自氨水，胺，氢氧化铵，氢氧化钠，氢氧化钾，氢氧化钙和氢氧化钡的pH控制剂。
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公开(公告)号：KR100277204B1
公开(公告)日：2001-01-15
申请号：KR1019980029908
申请日：1998-07-24
Applicant: 한국화학연구원
Abstract: 본 발명은 질화규소와 탄소강의 접합방법에 관한 것으로서, 더욱 상세하게는 질화규소(Si
3 N
4 )를 열처리하여 금속실리콘(Si)과 질소기체(N
2 )로 해리시킴으로써 질화규소 표면을 금속실리콘(Si) 층으로 개질시키고, 개질된 질화규소 표면의 금속실리콘(Si)과 탄소강의 Fe 사이의 공융(eutectic melting)을 유도하여 직접 접합하거나, 필요하다면 Ag-Cu계 일반납재를 사용하여 질화규소와 탄소강을 접합시키는 방법에 관한 것이다. 본 발명의 접합방법은 Ti 등의 활성금속이 포함된 고가의 Ag-Cu-Ti계 활성납재를 사용하지 않아도 충분한 접합효과를 얻을 수 있고, 또한 활성 금속 코팅을 위한 스퍼터링 등의 공정을 거치지 않으므로 생산비 절감의 효과가 우수하다.-
公开(公告)号：KR1019950001672B1
公开(公告)日：1995-02-28
申请号：KR1019900011939
申请日：1990-08-03
IPC: C04B35/58
Abstract: The composite comprises Si oxynitride, Si nitride and B nitride of 10-40 wt.%. The total of Si oxynitride and Si nitride is 60-90 wt.%, and Si oxynitride is at least 10 wt.%. The composite is useful for manufacturing cast brake rings for car.
Abstract translation: 复合材料包含10-40重量％的氮氧化硅，氮化硅和氮化硼。 Si氮氧化物和Si氮化物的总和为60-90重量％，Si氧氮化物为至少10重量％。 该复合材料可用于制造汽车用铸造刹车环。
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公开(公告)号：KR100547256B1
公开(公告)日：2006-01-26
申请号：KR1020030067932
申请日：2003-09-30
Applicant: 한국화학연구원
IPC: C04B35/624
Abstract: 본 발명은 습식 성형법으로 제조된 알루미나 세라믹스 성형체의 균열 억제 방법에 관한 것으로서, 보다 상세하게는 세라믹 슬러리와 젤형성 고분자로서 상온응고형 고분자인 폴리사카라이드(polysaccharide)계 고분자 수용액을 혼합하여 원하는 형상의 금형에 주입하여 알루미나 세라믹스를 습식법으로 성형시에 폴리비닐 알코올(polyvinyl alcohol)을 강도 보강용 고분자로 첨가함으로써, 기존의 성형체 제조방법보다 단시간 내 건조시키더라도 균열이 없는 알루미나 세라믹스 성형체가 제조됨과 동시에, 이의 강도가 효과적으로 증가되어 건조, 취급 또는 가공시 발생할 수 있는 미세한 균열 등의 발생을 억제할 수 있게 됨에 따라 기계적 강도 측면에서 신뢰성이 향상된 알루미나 세라믹스 성형체를 보다 간단하게 실형상으로 제조할 수 있는 방법에 관한 것이다.
폴리사카라이드, 폴리비닐알코올, 알루미나 세라믹스-
Patent Agency Ranking
公开(公告)号：KR1020030034713A
公开(公告)日：2003-05-09
申请号：KR1020010066400
申请日：2001-10-26
Applicant: 한국화학연구원
IPC: H01M4/96
Abstract: PURPOSE: A method for preparing a gas diffusion electrode is provided, to improve the gas permeation and the durability and to lower the overvoltage of an electrode by enhancing the hydrophobicity of carbon black. CONSTITUTION: The method comprises the steps of heating carbon black at 450-550 deg.C and dipping the heated one into an acid or alkali solution; dispersing the pretreated carbon black into a perfluorinated compound to make the surface be hydrophobic; and preparing a gas diffusion electrode using the treated carbon black, a catalyst and a binder. Preferably the amount of the perfluorinated compound is 10-200 wt% based on the amount of carbon black, and is selected from a perfluorinated alkyl silane and a perfluorinated polyether. Preferably the perfluorinated alkyl silane is represented by SiX3CH2(CH2)n(CF2)5CF, wherein X is Cl, OCH3 or OCH2CH3 and n is an integer of 4-20; and the perfluorinated polyether is Y-CF2O-(CF2CF2)p-(CF2O)q-CF2-Y, wherein Y is CH2OH, CH2OCH3, CH2(OCH2CH2)rOH, CH2OCH2CH(OH)CH2OH, p is an integer of 4-20 and p/q is 0.5 and r is an integer of 1-4.
Abstract translation: 目的：提供一种制备气体扩散电极的方法，以通过提高炭黑的疏水性来改善气体渗透性和耐久性，并降低电极的过电压。 构成：该方法包括在450-550℃加热炭黑并将加热的酸浸入酸或碱溶液中的步骤; 将预处理的炭黑分散在全氟化合物中，使表面疏水; 并使用经处理的炭黑，催化剂和粘合剂制备气体扩散电极。 优选地，全氟化合物的量相对于炭黑的量为10-200重量％，并且选自全氟化烷基硅烷和全氟化聚醚。 优选地，全氟化烷基硅烷由SiX 3 CH 2（CH 2）n（CF 2）5 CF表示，其中X是Cl，OCH 3或OCH 2 CH 3，n是4-20的整数; 全氟化聚醚为Y-CF2O-（CF2CF2）对（CF2O）q-CF2-Y，其中Y为CH2OH，CH2OCH3，CH2（OCH2CH2）rOH，CH2OCH2CH（OH）CH2OH，p为4-20的整数 p / q为0.5，r为1-4的整数。
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公开(公告)号：KR1020020003887A
公开(公告)日：2002-01-16
申请号：KR1020000034032
申请日：2000-06-21
Applicant: 한국화학연구원
IPC: C01G23/047
CPC classification number: C01G23/047 , C01P2002/52 , C01P2006/40
Abstract: PURPOSE: A method for preparing titanium suboxides powder with high thermal oxidation resistance is provided. The invented titanium suboxides is capable of keeping superior electrochemical property even in the temperature range higher than 400deg.C without reoxidation. CONSTITUTION: In the fabrication method of titanium suboxides powder where titanium dioxide ceramic slurry is granulated by spray dryer, and then it is reduced under hydrogen atmosphere, the present invention is characterized in that Mn 1-5wt.% is incorporated, based on the weight of titanium dioxide, in the titanium dioxide ceramic slurry.
Abstract translation: 目的：提供一种制备具有高耐热氧化性的低氧化钛粉末的方法。 本发明的低金属氧化物即使在高于400℃的温度范围内也能够保持优异的电化学性能，而无需再氧化。 构成：在二氧化钛陶瓷浆料通过喷雾干燥器造粒，然后在氢气氛下还原的低氧化钛粉末的制造方法中，本发明的特征在于，以重量计，加入锰1-5重量％ 的二氧化钛，在二氧化钛陶瓷浆料中。
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公开(公告)号：KR1020000020267A
公开(公告)日：2000-04-15
申请号：KR1019980038797
申请日：1998-09-18
Applicant: 한국화학연구원
Abstract: PURPOSE: A bonding jig is provided to increase productivity by preventing a bonding material from being apart and by feeding bonding load at the same time as designing the shape of the present cylinder typed bonding jig in a cap shape. CONSTITUTION: A bonding jig(10) is made up of a cap shape which contains a bonding part between different basic materials. The inner diameter of the jig is made into one selected from a straight line(13), a gap(14) and a taper(15). The straight line is used when heat expansion rates of two basic materials are similar to each other. The gap and the taper are used when the heat expansion rate of ceramic is very small and the heat expansion rate of metal is very big.
Abstract translation: 目的：提供一种接合夹具，通过防止接合材料分离，并通过在设计具有盖形状的圆筒型接合夹具的形状的同时，提供接合负荷来提高生产率。 构成：接合夹具（10）由包含不同基材之间的接合部的帽形构成。 将夹具的内径制成从直线（13），间隙（14）和锥形（15）中选择的一个。 当两种基本材料的热膨胀率彼此相似时，使用直线。 当陶瓷的热膨胀率非常小，金属的热膨胀率非常大时，使用间隙和锥度。
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公开(公告)号：KR1020040013236A
公开(公告)日：2004-02-14
申请号：KR1020020046076
申请日：2002-08-05
Applicant: 한국화학연구원
IPC: H01L21/68
Abstract: PURPOSE: A conductive ceramic electrode is provided to obtain uniform and strong absorption power by making a conductive ceramic electrode formed of a conductive ceramic material including titanium such that the conductive ceramic electrode is of a plate type to generate a uniform electric field. CONSTITUTION: An electrode(20) is composed of a conductive ceramic material including titanium. The conductive ceramic material is a mixture composed of titanium nitride and aluminum nitride wherein the aluminum nitride is 5-50 weight percent of the titanium nitride.
Abstract translation: 目的：提供一种导电陶瓷电极，通过制造由包括钛的导电陶瓷材料形成的导电陶瓷电极，使得导电陶瓷电极为板状以产生均匀的电场而获得均匀和强的吸收能力。 构成：电极（20）由包括钛的导电陶瓷材料构成。 导电陶瓷材料是由氮化钛和氮化铝组成的混合物，其中氮化铝为氮化钛的5-50重量％。
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公开(公告)号：KR1020030022425A
公开(公告)日：2003-03-17
申请号：KR1020010047015
申请日：2001-08-03
IPC: A61L27/44
Abstract: PURPOSE: Provided is a production process of organic or inorganic complex with bioactive and biodegradable property which is applied to a bone substitute, a bone filler, a bolt for fixing the bone or like to generate a calcium apatite layer naturally and form strong combination with natural bone tissue so that it reduces time in curing the bone. CONSTITUTION: The production process of organic or inorganic complex with bioactive and biodegradable property comprises the steps of: (i) mixing 100wt% of biodegradable polymer including function group which is selected from hydroxide, amine, carboxyl and vinyl group and 1-50wt% of coupling agent including functional group which is selected from isocyanate, amine, vinyl and chloride group to prepare coupled biodegradable polymer; and (ii) adding 10-90wt% of ceramic precursor and 1-30wt% of aqueous calcium salt to 100wt% of coupled degradable polymer and completing sol-gel reaction.
Abstract translation: 目的：提供具有生物活性和生物降解性质的有机或无机复合物的生产方法，其应用于骨替代物，骨填料，用于固定骨等的螺栓以自然产生钙磷灰石层，并与天然形成强烈的组合 骨组织，从而减少固化骨骼的时间。 构成：具有生物活性和生物可降解性质的有机或无机复合物的生产过程包括以下步骤：（i）将100重量％的可生物降解的聚合物，包括选自氢氧化物，胺，羧基和乙烯基的官能团和1-50重量％ 包括选自异氰酸酯，胺，乙烯基和氯化物基团的官能团的偶联剂，以制备偶联的生物可降解聚合物; 和（ii）向100重量％的可降解聚合物中加入10-90重量％的陶瓷前体和1-30重量％的钙盐水溶液，并完成溶胶 - 凝胶反应。
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