Dielectric Properties in the Insoluble Compositions of BaTiO₃-CaTiO₃ Ceramics

Abstract:

A conventional solid phase reaction method was followed to prepare (1−x)BaTiO3-xCaTiO3 based ceramics with content fractions ranging from x = 0.00 to 1.00. Phase segregation was observed when x exceeded 0.10. DC breakdown voltage (DC-BDV) abruptly changed at x = 0.30 and 0.85. Furthermore, the DC-BDV values of insoluble compositions (x = 0.30−0.85) were much higher than those of solubility limit (x = 0.20 and 0.90). Results obtained by investigation of the amount of absorbed current and the dependence of the rate of voltage increase for DC-BDV and AC-BDV confirmed the formation of space charge in insoluble compositions. This suggests that the dependence of the DC-BDV value for (1−x)BaTiO3-xCaTiO3 based ceramics was affected by the formation of space charge.

• Periodical: Key Engineering Materials (Volume 388)
• Pages: 225-228
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.388.225
• Online since: September 2008
• Authors: Koichi Banno, Tomomi Koga, Toshikazu Takeda, Harunobu Sano, Tadashi Morimoto, Hiroshi Takagi
• Keywords: BaTiO₃, CaTiO₃, DC Breakdown Voltage, Insoluble, Phase Segregation

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