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Erschienen in:
01.03.2012
Current–voltage nonlinear and dielectric properties of CaCu3Ti4O12 ceramics prepared by a simple thermal decomposition method
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 3/2012
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Abstract
In this work, pure-CaCu3Ti4O12 was successfully prepared by a simple thermal decomposition method. This can easily be achieved by direct firing of starting raw materials dissolved in an aqueous citric acid solution at 800 °C for 6 h. The results show that sintering conditions have a remarkable influence on the microstructure of the CaCu3Ti4O12 ceramics. Interestingly, dense CaCu3Ti4O12 ceramic sintered at 1,050 °C for 2 h exhibits a high dielectric constant of ~5.1 × 103 with low loss tangent of ~0.048 at 30 °C and 1 kHz. The dielectric properties, electrical response of grain boundaries, and related nonlinear current–voltage behavior are found to be associated with the microstructure of CaCu3Ti4O12 ceramics.