Abstract
CaCu3Ti4O12 powders were successfully prepared by a polyvinyl pyrrolidone-dimethylformamide solution route. Pure phase of CaCu3Ti4O12 was achieved at a low calcination temperature and short reaction time at 800 °C for 3 h. High porosity and neck-grain growth network were observed in CaCu3Ti4O12 powders. The sintered CaCu3Ti4O12 ceramic with fine-grained microstructure exhibited a very high dielectric constant of 1.26 × 104 and low loss tangent of about 0.07 at 1 kHz and 20 °C. Nonlinear current-voltage behavior and dielectric properties were found to be closely related to the microstructure.
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Acknowledgments
This work was supported by the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission, through the Advanced Functional Materials Cluster of Khon Kaen University.
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Sangwong, N., Yamwong, T. & Thongbai, P. Synthesis, characterization and giant dielectric properties of CaCu3Ti4O12 ceramics prepared by a polyvinyl pyrrolidone-dimethylformamide solution route. J Electroceram 31, 181–188 (2013). https://doi.org/10.1007/s10832-013-9832-x
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DOI: https://doi.org/10.1007/s10832-013-9832-x