公开(公告)号：KR100575213B1

公开(公告)日：2006-05-02

申请号：KR1020030027780

申请日：2003-04-30

Applicant: 한국과학기술연구원

Inventor： 배동식 ,  한경섭 ,  김상우 ,  방재희 ,  김은정 ,  김경채

IPC: B82B3/00 ,  B82Y40/00

Abstract: 본 발명은 나노 크기의 Ag 분말을 역 마이셀을 이용한 마이크로 에멜젼 공정으로 제조하는 것으로서, Ag 분말의 크기는 5에서 200nm 조절이 가능하고, 입도 분포 제어가 가능하다.
나노 분말, 역마이셀, 에멀젼

公开(公告)号：KR1020040093911A

公开(公告)日：2004-11-09

申请号：KR1020030027780

申请日：2003-04-30

Applicant: 한국과학기술연구원

Inventor： 배동식 ,  한경섭 ,  김상우 ,  방재희 ,  김은정 ,  김경채

IPC: B82B3/00 ,  B82Y40/00

CPC classification number: B22F9/24 ,  B22F1/0044 ,  B82Y40/00

Abstract: PURPOSE: Provided is a method for preparing silver nano-sized powder having controlled particle size distribution of up to 100 nm by using micro-emulsion process. CONSTITUTION: The method for preparing Ag nano-sized powders comprises the steps of: mixing an aqueous solution of silver with a surfactant in an organic solvent to obtain a reverse micelle micro-emulsion; reducing silver by adding a reducing agent to the emulsion and agglutinating to obtain silver powder; and washing the powder to isolate from the organic solvent. Particularly, the organic solvent is at least one selected from cyclohexane and isooctane, and the surfactant is at least one selected from polyoxyethylene nonylphenyl ether and sodium bis(2-ethylhexyl) sulfonate. Further, the reducing agent may be 0.1-2 wt% of N2H4.xH2O.

Abstract translation: 目的：提供一种通过使用微乳液法制备具有高达100nm的可控粒度分布的银纳米尺寸粉末的方法。 构成：制备Ag纳米尺寸粉末的方法包括以下步骤：将银水溶液与表面活性剂在有机溶剂中混合，得到反胶束微乳液; 通过向乳液中加入还原剂并凝集得到银粉来还原银; 并洗涤粉末与有机溶剂分离。 特别地，有机溶剂是选自环己烷和异辛烷中的至少一种，表面活性剂是选自聚氧乙烯壬基苯基醚和双（2-乙基己基）磺酸钠中的至少一种。 此外，还原剂可以为0.1〜2重量％的N 2 H 4·xH 2 O.

公开(公告)号：KR1020040044024A

公开(公告)日：2004-05-27

申请号：KR1020020072520

申请日：2002-11-20

Applicant: 한국과학기술연구원

Inventor： 배동식 ,  한경섭 ,  김은정 ,  김경채

IPC: B82B3/00 ,  B82Y40/00

CPC classification number: C01G25/02 ,  C01F17/0043 ,  C01P2004/64

Abstract: PURPOSE: Provided is a preparation method of nanosize Y2O3-added ZrO2 powder with 5-50nm size and spherical shape by coprecipitation and mechanical mixing. CONSTITUTION: The Y2O3-added ZrO2 powder is prepared by the following steps of: preparing an aqueous precursor solution with Y and Zr, wherein the Zr-source is zirconyl chloride octahydrate(ZrOCl3·8H2O) or zirconyl nitrate hydrate(ZrO(NO3)2·xH2O), and the Y-source is yttrium nitrate hexahydrate(Y(NO3)3·6H2O) or yttrium chloride hexahydrate(YCl3·6H2O); adding an neutralizer such as NH4OH, NaOH or KOH until the pH of the solution is 7 or more to form precipitates; ball milling or attrition milling the solution containing precipitates; washing the solution with water, filtering and drying at 100deg.C; and thermal-treating precipitates at 400-1000deg.C for 0.1-50hrs.

Abstract translation: 目的：提供一种通过共沉淀和机械混合制备具有5-50nm尺寸和球形的纳米尺寸的Y 2 O 3添加的ZrO 2粉末的制备方法。 构成：通过以下步骤制备添加Y2O3的ZrO 2粉末：用Y和Zr制备前体水溶液，其中Zr源是氧化锆八水合物（ZrOCl 3·8H 2 O）或硝酸氧锆水合物（ZrO（NO 3）2） ·xH2O），Y-源是硝酸钇六水合物（Y（NO 3）3·6H 2 O）或氯化钇六水合物（YCl 3·6H 2 O）; 加入中和剂如NH 4 OH，NaOH或KOH直至溶液的pH为7以上以形成沉淀物; 球磨或磨碎含有沉淀物的溶液; 用水洗涤溶液，过滤并干燥至100℃; 并在400-1000℃热处理沉淀0.1-50小时。