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ISSN : 1225-0112(Print)
ISSN : 2288-4505(Online)
Applied Chemistry for Engineering Vol.16 No.1 pp.150-152
DOI :

Notes : Characteristics of La0.2Ca0.8MnO3 Powder and Pellet Prepared by Sol-Gel Process

Mie Won Jung

Abstract

La0.2Ca0.8MnO3 colossal magnetoresistance (CMR) powders and pellets were synthesized by sol-gel process involving a stable metal chelate complex with acetylacetone. The structural changes of reaction mixture were monitored by FT-IR spectroscopy and X-ray diffractometry. The microstructure of sintered samples and the cation composition of gel powder were studied by FE-SEM/EDS and ICP-AES. The magnetic property was investigated as a function of temperature.

단신 : 졸-겔법으로 합성한 La0.2Ca0.8MnO3의 분말과 펠렛의 특성

정미원,이지윤

초록

아세틸아세톤이 치환된 금속-킬레이트 착물에 polyethylene glycol를 첨가시켜 안정하고 균일한 졸 용액을 얻은 뒤, 페로보스카이트 La0.2Ca0.8MnO3의 분말과 펠렛을 합성하였다. 반응과정에 대한 구조변화를 FT-IR과 XRD 분석기로 추적하였고, 입자 크기와 균일도를 살펴보았다. 그리고 온도의 함수로서의 자기적 특성도 관찰하였다.

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