Direct Measurement of Large Electrocaloric Effect in Ba(ZrxTi1–x)O3 Ceramics
| Autor: | Dan-Dan Li, Bo Liang, Biao Lu, Yi-Jiang Zeng, Yingbang Yao, Tao Tao, Jin-Hong Guo, Jia-Le Chen, Sheng-Guo Lu, Xiao-Dong Jian |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Analytical chemistry Ionic bonding 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Ferroelectricity Titanate visual_art 0103 physical sciences visual_art.visual_art_medium Electrocaloric effect General Materials Science Ceramic 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 10:4801-4807 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b15933 |
| Popis: | Barium zirconate titanate (BZT) (Ba(ZrxTi1–x)O3) 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. |
| Databáze: | OpenAIRE |
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