Electrical Properties of a Lead-Free Perovskite Ceramic: Ba(Gd_(1/2)Nb_(1/2))O_3

K. Amar Nath ； K. P. Chandra ； A. R. Kulkarni ； K. Prasad

《Advances in Ceramic Science and Engineering》 3卷 (2014/11) Pp. 11-17

https://doi.org/10.14355/acse.2014.0301.02

並列摘要

Polycrystalline Ba(Gd_(1/2)Nb_(1/2))O_3 was prepared using a high-temperature solid-state reaction method. X-ray diffraction analysis indicated the formation of a single-phase cubic structure having space group Pm3m. AC impedance plots as a function of frequency at different temperatures were used to analyse the electrical behaviour of the sample, which indicated the negative temperature coefficient of resistance character. Complex impedance analysis targeted non-Debye type dielectric relaxation. Frequency dependent ac conductivity data obeyed Jonscher's power law. The apparent activation energy was estimated to be 0.17 eV at 1 kHz.

並列關鍵字

Ba(Gd_(1/2)Nb_(1/2)) ； Perovskite ； Dielectric Properties ； Dielectric Relaxation ； Electrical Conductivity