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Abstract
Ca2CuO3 ceramics were synthesized by the traditional solid-state sintering method. Its dielectric properties were studied in the frequency range from 102 Hz to 106 Hz and in the temperature range from 100 K to room temperature. The activation energy was calculated by the Arrhenius Equation. The analysis for XPS spectrum and the fitting value of the activation energy (Q = 0.17 eV) indicated that the dielectric response in Ca2CuO3 might be governed by the electron hopping between the Cu ions. The experimental result revealed a relaxation process for the polarization mechanism. Given the relationship between relaxation time and temperature, the dielectric properties of Ca2CuO3 can be perfectly described by the Cole-Cole model.
Acknowledgments
We wish to express our cordial thanks to Dr. Zhang Chao for his advice and for giving us an opportunity to perform the dielectric test. Thanks shall also be given to Dr. Wang Xiaofei for his advice. This work was supported by the National Natural Science Foundation of China (Grant No. 50972056).