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