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Effects of CuO on the Preparation, Microstructure and Dielectric Response of CaCu3Ti4O12

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Abstract:

CaCu3Ti4O12 (CCTO) barrier layer ceramic capacitor was prepared by a two-step sintering process. The CCTO powders were pre-synthesized at 900oC by solid-state reaction and the effects of the amount of CuO on the formation of the CCTO powders were investigated. The CCTO ceramics were prepared by the second-step sintering. It was found that the abnormal grain growth and inhomogeneous microstructure are controlled by the amount of excessive CuO. The optimized CuO content in the composites is ~14 wt%. The maximum permittivity is 115,000 (1 kHz, 210oC).

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Periodical:

Key Engineering Materials (Volumes 368-372)

Pages:

121-122

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.121

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Online since:

February 2008

Authors:

Jian Fang Qiao, Dan Dan Qin, Li Guan, Hai Long Wang, Rui Zhang

Keywords:

Bimodal Grain, CaCu3Ti4O12 (CCTO), CuO, Dielectric Property

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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