Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Fabrication of the ultrafine ZnO powder through glycothermal process

Glycothermal 공정에 의한 미립 ZnO 분말의 제조

  • Dong-Sik Bae (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Kyong-Sop Han (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Yong-Kap Park (Department of Materials Science and Engineering Sunmoon University) ;
  • Seung-Beom Cho (Division of Materials Research Center, Rutgers University) ;
  • Sang -Heul Choi (Department of Materials Engineering, Hanyang University)
  • Published : 1997.11.01
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Abstract

The ZnO powder was prepared under glycothermal conditions by precipitation from metal nitrates with aqueous potassium hydroxide. The fine powder was obtained at temperatures as low as 225 to $275^{\circ}C$, The microstructure and phase of the powder were studied by SEM and XRD. The properties of the ZnO powder were studied as a function of various parameters (reaction temperature, reaction time, solid loading, etc). The average particle size of the ZnO increased with increasing reaction temperature. After glycothermal treatment at $225^{\circ}C$ for 8 h, the average particle size of the ZnO powder was about 150 nm and the particle size distribution was narrow.

고순도 ZnO 미분말은 금속 질산염을 수산화 칼슘으로 침전시켜 이를 1,4-부탄에디올속에서 고온고압 반응으로 얻어졌다. 이때 미분말이 얻어진 반응온도는 $225-275^{\circ}C$, 압력은 1-3.0 MPa 이였다. 분말의 미세구조는 주사전자현미경으로 결정상은 X-선회절 분석으로 행하였다. 분말의 물성과 반응온도, 반응시간 및 농도의 관계를 조사하였다. ZnO 분말의 평균입자크기는 반응온도와 시간이 증가함에 따라 증가하고, 입자의 모양은 반응온도가 증가함에 따라 다각형의 모양이 얻어졌다. $225^{\circ}C$에서 8 시간 반응을 행한 경우의 평균입자 크기는 약 150 nm 이고, 입도분포는 균일하였다.

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