Phase transition and dielectric study in Ba0.95Dy0.05TiO3 ceramic

Bulletin of Materials Science

关键词: BDT;    ferroelectric;    dielectric;    relaxor.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Temperature and frequency dependence dielectric permittivity of Ba0.95Dy0.05TiO3 ceramic has been studied in the temperature range of 100–350 K at the frequencies, 1 kHz, 10 kHz, 100 kHz and 1 mHz. Diffuse phase transition and frequency dispersion is observed in the permittivity-vs-temperature plots. This has been attributed to the occurrence of relaxor ferroelectric behaviour. The observed relaxor behaviour has been quantitatively characterized based on phenomenological parameters. A comparison with the Zr doped BaTiO3 has also been presented. The microstructure of as-sintered samples shows a dense and almost uniform micrograph without any impurity phases; the grains are almost spherical with random orientation.

【 授权许可】

CC BY