Effects of Microwave Sintering Time on Microstructure, Dielectric, Ferroelectric Properties of Barium Zirconate Titanate Ceramics

Abstract:

Barium zirconate titanate ceramics were prepared by microwave sintering. Effects of microwave sintering time at 2.5kW on microstructure, dielectric and ferroelectric properties of barium zirconate titanate ceramics have been investigated. The result shows that the ceramic samples sintered at 2.5kW for 15~30min are single phase perovskite structure and there is no secondary phase observed. The degree of crystallinity increases with the increase of microwave sintering time. As the microwave sintering time increases, barium zirconate titanate ceramics become more uniform and the grain size increases. The Curie temperature of the samples sintered at 2.5kW for 15min, 20min and 30min is-20°C, -10°C and-15°C, respectively. As the microwave sintering time increases, the dielectric constant of barium zirconate titanate ceramics decreases initially and then increases, and the dielectric loss decreases. Moreover, the remnant polarization of the sample increases initially and then decreases, and the coercive electric field decreases as the microwave sintering time increases.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 786-790
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.786
• Online since: March 2014
• Authors: Wei Cai*, Chun Lin Fu, Gang Chen, Xiao Ling Deng, Kai Hua Liu
• Keywords: Barium Zirconate Titanate, Ceramic, Dielectric, Ferroelectric, Microwave Sintering

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