期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 5, 页码 4801-4807出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b15933
关键词
barium zirconate titanate; ceramics; dielectric properties; phase transition; electrocaloric effect
资金
- Natural Science Foundation of China [51372042]
- Guangdong Provincial Natural Science Foundation [2015A030308004]
- NSFC-Guangdong Joint Fund [U1501246]
Barium zirconate titanate (BZT) (Ba(ZrxTi1-x)O-3) ceramics with Zr4+ contents of x = 5, 10, 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. The microstructures, morphologies, and electric properties were characterized using X-ray diffraction, scanning electron microscopy, and impedance analysis methods, respectively. The dielectric analyses indicate that the BZT bulk ceramics show characteristics of phase transition from a normal ferroelectric to a relaxor ferroelectric with the increasing Zr4+ ionic content. The electrocaloric effect adiabatic temperature change decreases with the increasing Zr4+ content. The highest adiabatic temperature change obtained is 2.4 K for BZT ceramics with a 5 mol % of Zr4+ ionic content.
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