Impact of phase transition sequence on the electrocaloric effect in Pb(Nb,Zr,Sn,Ti)O-3 ceramics

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2017-02-21
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Xu, Zunping
Fan, Zhongming
Liu, Xiaoming
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Tan, Xiaoli
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Materials Science and Engineering

The Department of Materials Science and Engineering teaches the composition, microstructure, and processing of materials as well as their properties, uses, and performance. These fields of research utilize technologies in metals, ceramics, polymers, composites, and electronic materials.

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The Department of Materials Science and Engineering was formed in 1975 from the merger of the Department of Ceramics Engineering and the Department of Metallurgical Engineering.

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1975-present

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The phase transition sequence in PbZrO3-based ceramics can be readily altered by chemical modification. In Pb0.99Nb0.02[(Zr0.57Sn0.43)(0.92)Ti-0.08](0.98)O-3 (PNZST 43/8/2), the sequence is ferroelectric-antiferroelectric-paraelectric during heating, while in Pb0.99Nb0.02 (Zr0.85Sn0.13Ti0.02)(0.98)O-3 (PNZST 13/2/2), it is antiferroelectric-ferroelectric-paraelectric during heating. The electrocaloric effect associated with the antiferroelectricferroelectric phase transition is studied in both ceramics via indirect measurement. PNZST 43/8/2 is observed to display a positive electrocaloric effect; in contrast, PNZST 13/2/2 exhibits a negative effect.

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This article is published as Xu, Zunping, Zhongming Fan, Xiaoming Liu, and Xiaoli Tan. "Impact of phase transition sequence on the electrocaloric effect in Pb (Nb, Zr, Sn, Ti) O3 ceramics." Applied Physics Letters 110, no. 8 (2017): 082901. doi: 10.1063/1.4976827. Posted with permission.

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Sun Jan 01 00:00:00 UTC 2017
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