Journal
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
Volume 17, Issue 3, Pages 1354-1361Publisher
WILEY
DOI: 10.1111/ijac.13384
Keywords
barium strontium titanate; ceramic; electrocaloric effect; P-E loops; permittivity
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Funding
- NSFC-Guangdong Joint Fund [U1501246]
- Natural Science Foundation of Guangdong Province [2015A030308004]
- National Natural Science Foundation of China [51372042, 51872053]
- Department of Education of Guangdong Province of People's Republic of China [2014GKXM039]
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Barium strontium titanate (Ba1-xSrxTiO3-BST) ceramics, where x = 0.05, 0.15, 0.25, and 0.35, was prepared via a solid-state reaction method. The lattice structures and morphologies of the ceramic samples were analyzed using X-ray diffraction and scanning electron microscopy technologies. The dielectric and ferroelectric properties of the BST ceramics were characterized using a precision impedance analyzer and a ferroelectric polarization-electric field (P-E) hysteresis loop tester, respectively. The electrocaloric effect was indirectly calculated using the Maxwell relations and P-E loops as a function of temperature and electrical field, and also directly measured using a computer-controlled thermocouple and high-voltage power supply. An adiabatic temperature change of 1.82 K was procured, indicating a promising potential in the applications as cooling devices.
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