용융염 합성법에 의한 Pb(Sc1/2Ta1/2)O3의 제조
Preparation of Pb(Sc1/2Ta1/2)O3 by the molten salt synthesis method
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초록
NaCl-KCl을 flux로 사용한 용융염 합성법을 이용하여 Pb(Sc1/2Ta1/2)O3 분말을 제조하였다. 700oC에서 800oC의 온 도범위에서 상형성 및 분말 상태의 변화를 조사하였다. 용융염 합성법으로 750oC 2시간 하소하였을 때, 순수한 페로브스카 이트 구조를 가진 Pb(Sc1/2Ta1/2)O3 상이 형성되었으며, 평균 입자 크기는 0.5mm 이하이고 입방체와 유사한 형상을 갖는 분 말이 제조되었다. DTA, X-선 회절 분석, 미세구조 변화를 통해 합성된 분말의 특성을 고찰하였다.
Abstract
Lead scandium tantalate powders were prepared by a molten salt synthesis method using NaCl-KCl as a flux.Variations in phase formation and particle morphology were investigated for the temperature range from 700oC to 800oC.Pb(Sc1/2Ta1/2)O3 with pure perovskite phase was formed at 750omorphology and the average particle size below 0.5m. The results were discused with respect to DTA, X-ray diffraction,and microstructural characterization data.
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