졸-겔법으로 합성한 La0.2Ca0.8MnO3의 분말과 펠렛의 특성

정미원; 이지윤; 김현정; Miewon Jung; Jiyun Lee; Hyunjung Kim

Journal of the Korean Industrial and Engineering Chemistry, Vol.16, No.1, 150-152, February, 2005

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졸-겔법으로 합성한 La0.2Ca0.8MnO3의 분말과 펠렛의 특성

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

정미원^†, 이지윤, 김현정

성신여자대학교 화학과

Miewon Jung^†, Jiyun Lee, and Hyunjung Kim

Department of Chemistry, Sungshin Women's University, Seoul 136-742, Korea

E-mail:

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.

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.

Keywords:La0.2Ca0.8MnO3 CMR;FE-SEM/EDS;ICP-AES;magnetic property

[References]

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Lu CJ, Wang ZL, J. Mater. Res., 15, 2454 (2000)
Hwang HJ, Moon JH, Awano M, Maeda K, J. Am. Ceram. Soc., 83, 2852 (2000)
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Finch CA, Polyvinyl Alcohol: Properties and Applications, 17, John Wiley & Sons, London (1973)
Jung MW, Lee JY, Kim HJ, J. Kor. Ceram. Soc., 40, 434 (2003)
Bilger S, Syskakis E, Naoumidis A, Nickel H, J. Am. Ceram. Soc., 75, 964 (1992)
Murakami Y, shindo D, Chiba H, Kikuchi M, Syono Y, J. Solid State Chem., 140, 331 (1998)
Schiffer P, Ramirez AP, Bao W, Cheong SW, Phys. Rev. Lett., 75, 3356 (1995)

[Referenced By]

[1] Tokura Y, Tomioka Y, J. Magn. Magn. Mater., 200, 1 (1999)

[2] Lu CJ, Wang ZL, J. Mater. Res., 15, 2454 (2000)

[3] Hwang HJ, Moon JH, Awano M, Maeda K, J. Am. Ceram. Soc., 83, 2852 (2000)

[4] Taguchi H, Matsura S, Nagao M, Choso T, Tabata K, J. Solid State Chem., 129, 60 (1997)

[5] Finch CA, Polyvinyl Alcohol: Properties and Applications, 17, John Wiley & Sons, London (1973)

[6] Jung MW, Lee JY, Kim HJ, J. Kor. Ceram. Soc., 40, 434 (2003)

[7] Bilger S, Syskakis E, Naoumidis A, Nickel H, J. Am. Ceram. Soc., 75, 964 (1992)

[8] Murakami Y, shindo D, Chiba H, Kikuchi M, Syono Y, J. Solid State Chem., 140, 331 (1998)

[9] Schiffer P, Ramirez AP, Bao W, Cheong SW, Phys. Rev. Lett., 75, 3356 (1995)