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公开(公告)号：KR100400355B1
公开(公告)日：2003-10-04
申请号：KR1020010013733
申请日：2001-03-16
Applicant: 한국과학기술연구원
Abstract: PURPOSE: A method for synthesizing nanosized SiO2 particles with a particle size distribution of 10 to 75 nm by reverse micelle and sol-gel process is provided. CONSTITUTION: The method for synthesizing nanosized SiO2 particles includes the steps of adding (a) one or more surfactants selected from polyoxyethlene nonylphenyl ether and sodium bis(2-ethylhexyl) sulfonate and (b) one or more organic solvents selected from cyclohexane and isooctane into water to prepare an organic solution; reacting the organic solution with tetraethoxysilane (TEOS) in the presence of NH4OH for the promotion of hydrolysis and condensation so that nanosized SiO2 particles are obtained; and rinsing the nanosized SiO2 particles with at least one solvents selected from the group consisting of ethanol, acetone, isopropanol, methanol, toluene and methoxy ethanol. In the above reaction, mole ratio of water/surfactant is 2 to 50, water/TEOS is 5 to 400 and NH4OH/TEOS is 0.1 to 5.
Abstract translation: 目的：提供一种通过反胶束和溶胶 - 凝胶法合成粒径分布为10〜75nm的纳米SiO2粒子的方法。 构成：合成纳米SiO2颗粒的方法包括将选自聚氧乙烯壬基苯基醚和双（2-乙基己基）磺酸钠中的一种或多种表面活性剂和（b）选自环己烷和异辛烷的一种或多种有机溶剂 水制备有机溶液; 使有机溶液与四乙氧基硅烷（TEOS）在NH 4 OH存在下反应以促进水解和缩合，从而获得纳米尺寸的SiO 2颗粒; 和用选自乙醇，丙酮，异丙醇，甲醇，甲苯和甲氧基乙醇中的至少一种溶剂冲洗纳米尺寸的SiO 2颗粒。 在上述反应中，水/表面活性剂的摩尔比为2至50，水/ TEOS为5至400，NH 4 OH / TEOS为0.1至5。
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Patent Agency Ranking
公开(公告)号：KR100399716B1
公开(公告)日：2003-09-29
申请号：KR1020010031770
申请日：2001-06-07
Applicant: 한국과학기술연구원
IPC: B22F9/16
Abstract: PURPOSE: A method for manufacturing fine nickel powder with a particle size distribution of 100 to 1000 nm using liquid reaction method is provided. CONSTITUTION: The method includes the steps of reacting a neutralizing agent with one metal precursor selected from (Ni(NO3)2·6H2O), (NiCl2x·H2O) and (NiSO4·6H2O) in aqueous solution to obtain precipitates; solving the precipitates in an organic solvent; treating above slurry at 200 to 300 deg.C under a pressure of 0.1 to 4 MPa to obtain fine metal powder; and extracting the organic solvent from the obtained fine metal powder by using solvents such as ethanol, acetone, isopropyl alcohol a methanol. The method is characterized in that the neutralizing agent is selected from KOH, NaOH and NH4OH; the organic solvent is selected from ethylene glycol, polyethylene glycol and butanediol.
Abstract translation: 目的：提供一种使用液体反应方法制造粒度分布为100至1000nm的细镍粉的方法。 构成：该方法包括使中和剂与选自（Ni（NO 3）2·6H 2 O），（NiCl 2·x·H 2 O）和（NiSO 4·6H 2 O）的一种金属前体在水溶液中反应以获得 沉淀物; 将沉淀物溶解在有机溶剂中; 在200〜300℃，0.1〜4MPa的压力下处理上述浆料，得到微细金属粉末; 使用乙醇，丙酮，异丙醇，甲醇等溶剂，从得到的金属细粉中提取有机溶剂。 该方法的特征在于中和剂选自KOH，NaOH和NH 4 OH; 有机溶剂选自乙二醇，聚乙二醇和丁二醇。
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公开(公告)号：KR1020010036332A
公开(公告)日：2001-05-07
申请号：KR1019990043290
申请日：1999-10-07
Applicant: 한국과학기술연구원
IPC: C04B35/563 , C01F5/02 , C01B31/36
CPC classification number: C01B32/956 , B01D43/00 , C01F5/40
Abstract: PURPOSE: Provided is a method for environmentally friendly isolating magnesium oxide, which is produced from manufacturing of CB4 powder using B2O3, C and Mg by a self-propagation high temperature synthesis method. Thereby, MgO is effectively separated and can be recycled. CONSTITUTION: The method comprises steps of: (i) washing reaction products of B2O3, C and Mg with distilled water or alcohol to remove unreacted B2O3; (ii) after dispersing the resultant products of the step (i) in dilute sulfuric acid, stirring them to react the unreacted Mg and MgO of the reaction product with the sulfuric acid; (iii) filtering the resultant products of the step (ii) to separate CB4; and (iv) concentrating the filtrate of the step (iii) to obtain crystalline MgSO4·nH2O.
Abstract translation: 目的：提供一种通过自传播高温合成方法由使用B2O3，C和Mg的CB4粉末制造而生产的环境友好的氧化镁隔离方法。 因此，MgO被有效地分离并且可以再循环。 方法：该方法包括以下步骤：（i）用蒸馏水或乙醇洗涤B2O3，C和Mg的反应产物以除去未反应的B2O3; （ii）将步骤（i）的所得产物分散在稀硫酸中后，搅拌使反应产物的未反应的Mg和MgO与硫酸反应; （iii）过滤步骤（ii）的所得产物以分离CB4; 和（iv）浓缩步骤（ⅲ）的滤液，得到结晶的MgSO 4·nH 2 O.
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公开(公告)号：KR1019970010354B1
公开(公告)日：1997-06-25
申请号：KR1019950003400
申请日：1995-02-22
Applicant: 한국과학기술연구원
Abstract: The invention provides a TiB2-BN-AIN type ceramics deposited vessel. Its formula is wTiB2-xBN-yAIN-zWC in which w, x, y and z are 0.6 to 0.7, 0.15 to 0.20, 0.08 to 0.17 and 0.03 to 0.15 (w+x+y+z=1). The characteristics of process for producing the vessel are mixing TiB2-BN-AIN type ceramics material with WC, a sintering additive and sintering the mixture at a temperature of 1800-1950 C under a pressure in nitrogen atmosphere
Abstract translation: 本发明提供了一种TiB2-BN-AIN型陶瓷沉积容器。 其中w，x，y和z分别为0.6〜0.7,0.15〜0.20,0.08〜0.17,0.03〜0.15（w + x + y + z = 1）的wTiB2-xBN-yAIN-zWC。 用于制造容器的方法的特征是将TiB2-BN-AIN型陶瓷材料与WC（烧结添加剂）混合，并在氮气气氛中在1800-1950℃的温度下烧结该混合物
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公开(公告)号：KR1019960031399A
公开(公告)日：1996-09-17
申请号：KR1019950003400
申请日：1995-02-22
Applicant: 한국과학기술연구원
Abstract: 본 발명은 하기 식으로 표시되는 조성으로 이루어지는 TiB
2 -BN-AlN계의 세라믹스 증착 용기 및 그의 제조 방법에 관한 것이다.
wTlB
2 -xBN-yAlN-zWC
여기서, 0.60≤w≤0.70, 0.15≤x≤0.20, 0.08≤y≤0.17, 0.03≤z≤0.15인데, 다만 w+x+y=z=1이다.
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