2007•Key engineering materialsOpen access

Effects of Processing Conditions on the Dielectric Properties of CaCu3Ti4O12 Ceramics

Chih‐Ming Wang, Kuo-Sheng Kao, Shih Yuan Lin, Ying‐Chung Chen, Shang Chih Weng

Abstract

In this present work, we adopt conventional solid state reaction techniques to obtain CaCu3Ti4O12 (CCTO) ceramics and the dielectric properties of polycrystalline CCTO samples sintered in the temperature range 900 − 1100°C were investigated. X-ray diffraction (XRD) patterns show no obvious change in crystal phase with various sintering temperature. However, experimental results show that the dielectric properties of CCTO ceramics are very sensitive to processing parameters and the dependence of dielectric constant and loss tangent of CCTO ceramic on processing can be obtained. The effect of sintering conditions on the surface microstructures and the electrical properties of CCTO ceramics are also discussed in this study.

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Key concepts: Materials science, Dielectric, Sintering, Ceramic, Dissipation factor, Crystallite, Microstructure, Composite material