Relaxation Behavior of Zr Substituted CaCu3Ti4O12 Ceramics

Abstract:

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The dielectric properties of Zr substituted CaCu3Ti4O12 ceramics have been investigated in detail. Grain size decreases with Zr content increasing. The hetero-electrical microstructures of prepared samples have been confirmed by the impedance spectra. The dielectric loss has been improved by Zr doping because of the enhancement of grain boundary resistivity. A Debye-like boundary relaxation behavior has been observed in the temperature range of 220-600K. As Zr content increases, the relaxation time increases due to the higher grain boundary concentration. This work has provided an additional proof for the origin of giant dielectric response in CaCu3Ti4O12 ceramics.

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Periodical:

Edited by:

Chengming Li, Chengbao Jiang, Zhiyong Zhong and Yichun Zhou

Pages:

375-379

DOI:

10.4028/www.scientific.net/MSF.687.375

Citation:

H. T. Yu et al., "Relaxation Behavior of Zr Substituted CaCu3Ti4O12 Ceramics", Materials Science Forum, Vol. 687, pp. 375-379, 2011

Online since:

June 2011

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$35.00

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