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

The Korea Association of Crystal Growth (한국결정성장학회)
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Synthesis and characterization of the ultrafine $ZnFe_2O_4$ powder by glycothermal

Glycothermal에 의한 초미립의 $ZnFe_2O_4$분말 합성 및 특성

  • Bae, Dong-Sik (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Han, Kyong-Sop (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Cho, Seung-Beom (Division of Materials Research Center, Rutgers University) ;
  • Choi, Sang-Hael (Department of Inorganic. Materials. Engineering, Hanyang University)
  • Published : 1997.02.01
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Abstract

The $ZnFe_2O_4$ 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 $300^{\circ}C$. The microstructure and phase of the $ZnFe_2O_4$ powder were studied by SEM and XRD. The properties of the powder were studied as a function of various parameters (reaction temperature, reaction time, solid loading, etc). The average particle size of the $ZnFe_2O_4$ increased with increasing reaction temperature. After glycothermal treatment at $270^{\circ}C$ for 8 h, the average particle diameter of the $ZnFe_2O_4$ was about 50 nm.

$ZnFeO_4$ 분말은 금속 질산염을 수산화 칼슘으로 침전시켜 이를 1,4-부탄에디을 속에서 비교적 고온고압을 가하여 얻어졌다. 미분말이 얻어진 온도는 225-$300^{\circ}C$, 압력은 1-3.5 MPa이였다. 분말의 미세구조는 주사전자현미경으로 결정상은 X-선 회절 분석으로 행하였다. 분말의 물성과 반응온도, 반응시간 및 농도의 관계를 조사하였다. $ZnFe_2O_4$ 분말의 평균입자 크기는 반응온도와 시간이 증가함에 따라 증가하였다. $270^{\circ}C$에서 8시간 반응을 행한 경우의 평균입자 크기는 약 50 nm였다.

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