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Defect structure evolution and electrical properties of BaTiO 3 ‐based ferroelectric ceramics
Author(s) -
Lv Jiahao,
Hao Hua,
Jiang Xuewen,
Liu Zhen,
Emmanuel Marwa,
Cao Minghe,
Yao Zhonghua,
Liu Hanxing
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17220
Subject(s) - materials science , dielectric , ceramic , ferroelectricity , perovskite (structure) , activation energy , ferroelectric ceramics , grain size , mineralogy , analytical chemistry (journal) , composite material , chemical engineering , optoelectronics , chemistry , chromatography , engineering
Abstract Relaxor perovskite ferroelectric 0.1Bi(Zn 1/2 Zr 1/2 )O 3 ‐0.9BaTiO 3 (0.1BZZ‐0.9BT) ceramics were successfully prepared, whose powders synthesized by the sol‐gel process, with average grain size about 1.29 μm. 1.75 J/cm 3 discharge energy density and good dielectric stability were obtained over a wide temperature range from 25°C to 140°C. The pulse discharge capability of 0.1BZZ‐0.9BT ceramics was tested under different electric fields. The discharge time was 2.13 μs, which proved its ability to charge and discharge quickly. Complex impedance analysis and thermally stimulated depolarization current tests were applied to investigate the defect types and activation of 0.1BZZ‐0.9BT ceramics. The evolution process of composite defects and oxygen vacancies profoundly affects the dielectric temperature stability of 0.1BZZ‐0.9BT ceramics’ energy storage property.