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Received December 20, 2004
Accepted October 10, 2005
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Sol-Gel법에 의한 Perovskite-Type Oxide(La1-xSrxCo1-yFeyO3-δ) 코팅용액의 제조
Preparation of Perovskite-Type Oxide (La1-xSrxCo1-yFeyO3-δ) Coating Solution by Sol-Gel Method
건양대학교 화공생명학과, 320-711 충남 논산시 내동 26 1한국에너지기술연구원 에너지시스템연구부, 305-343 대전시 유성구 장동 71-2
Department of Chemical Engineering, Konyang University, 26, Nae-dong, Nonsan, Chungnam 320-711, Korea 1Energy System Division, Korea Institute of Energy Research, 71-2, Jang-dong, Yeseong-gu, Daejeon 305-343, Korea
Korean Chemical Engineering Research, December 2005, 43(6), 740-744(5), NONE Epub 23 January 2006
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Abstract
La(NO3)3· xH2O, Sr(NO3)2, Co(NO3)2· 6H2O, Fe(NO3)3· 9H2O를 출발물질로 하고 La와 Sr의 몰비를 변화시켜 perovskite형 산화물인 La1-xSrxCo1-yFeyO3-δ 졸을 제조하였다. 또한, 여러 조건에서 합성된 졸의 특성을 확인하기 위해 viscometer, FT-IR, TG-DTA, XRD 등을 사용하여 분석을 행하였다. 제조된 perovskite형 산화물 졸은 1.16 cp의 평균 점도를 나타내었으며 조성에 관계없이 pH 0.5정도의 강산성을 나타내었다. 용액 중의 La 함량이 많아질수록 동일 부피에서의 용액의 점도가 낮았고, 점도가 급격하게 증가하는 겔화시간이 증가하였다.
Perovskite-type oxide La1-xSrxCo1-yFeyO3-δ sols were prepared by sol-gel method using La(NO3)3· xH2O, Sr(NO3)2, Co(NO3)2· 6H2O and Fe(NO3)3· 9H2O as starting materials. The properties of the perovskite-type oxide sols were investigated by viscometer, FT-IR, TG-DTA and XRD. The prepared sols showed 1.16 cp in average viscosity, and a strong acidic condition of pH 0.5, irrespective of composition of the starting materials. The viscosity of sols at the same volume decreases, but the gelation time of sols, at which the sol viscosity increases rapidly, increases when increasing La concentration in composition of starting materials.
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Park JL, Lee DI, Park KP, Kim TH, Sung JS, Song KC, Korean Chem. Eng. Res., 42(5), 570 (2004)
