ZnTiO₃ Doping Effect on Dielectric Properties of CCTO Ceramics via a Molten Salt Process

Abstract:

CaCu3Ti4O12 (CCTO) powder was prepared by solid-state reaction. CCTO-ZnTiO3 composite ceramic were prepared by reaction of CCTO powder with molten ZnCl2 in air, 400°C. The products were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electric and dielectric properties of CCTO-ZnTiO3 composite ceramic were investigated. It is shown that the ceramic composites have higher grain-boundary resistivity and nonlinear coefficient. The addition of Zn mainly formed in the form of ZnTiO3 also affected the low frequency capacitance values, reduced the CCTO ceramic dielectric loss, which showed a Schottky-type nature of potential barrier. Moreover, the mechanisms involved in the NBLC model were discussed, where it is working with the IBLC model.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 1231-1234
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.1231
• Online since: June 2012
• Authors: Rong Yu, Ze Liang Cao, Hao Xue, Zhao Xian Xiong
• Keywords: CaCu₃Ti₄O₁₂, Composite, Electrical Properties

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