Intergrowth Bi₂WO₆–Bi₃TiNbO₉ ferroelectrics with high ionic conductivity

Yi, Z. G.; Li, Y. X.; Wen, Z. Y.; Wang, S. R.; Zeng, J. T.; Yin, Q. R.

Intergrowth Bi₂WO₆–Bi₃TiNbO₉ ferroelectrics with high ionic conductivity

Date

2005-05-03

Authors

Yi, Z. G.

Li, Y. X.

Wen, Z. Y.

Wang, S. R.

Zeng, J. T.

Yin, Q. R.

Publisher

American Institute of Physics (AIP)

Abstract

Two dielectric relaxation loss peaks associated with oxygen-ion diffusion in the intergrowth Bi₂WO₆–Bi₃TiNbO₉(Bi₅TiNbWO₁₅) bismuth layered ferroelectrics were observed. The activation energy and the relaxation time at infinite temperature, for these two peaks, were determined to be (0.89 eV, 1.3×10⁻¹³s) and (0.84 eV, 3.6×10⁻¹⁰s). The ac impedance spectroscopy indicated that the Bi₅TiNbWO₁₅ceramic is an ionic conductor with an electrical conductivity of approximately 2.6×10⁻²S/cm at a temperature of 1073 K.