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Materials 2015, 8(12), 8355-8365;

Polar Order Evolutions near the Rhombohedral to Pseudocubic and Tetragonal to Pseudocubic Phase Boundaries of the BiFeO3-BaTiO3 System

School of Materials and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China
Sate Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China
MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi’an Jiaotong University, Xi’an 710049, China
Author to whom correspondence should be addressed.
Academic Editor: Lorena Pardo
Received: 31 July 2015 / Revised: 23 October 2015 / Accepted: 27 October 2015 / Published: 2 December 2015
(This article belongs to the Section Energy Materials)
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Solid solutions of (1-x)BiFeO3-xBaTiO3 (BF-BT, 0.05 ≤ x ≤ 0.98) were prepared and characterized. It was found that the dielectric constant εm, remnant polarization Pr and piezoelectric coefficient d33 reach their maximum values near the rhombohedral–pseudocubic phase boundary. In particular, the 0.7BF-0.3BT composition shows large polarization (Pr > 20 μC/cm2) and a temperature-stable piezoelectric property (d33 > 100 pC/N when the annealing temperature is lower than ~400 °C). Near the tetragonal–pseudocubic phase boundary, εm and Pr decrease, and the piezoelectric property vanishes when the BF content reaches 4 mol %. View Full-Text
Keywords: morphotropic phase boundary; piezoelectric; BiFeO3 morphotropic phase boundary; piezoelectric; BiFeO3

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Wei, Y.; Jin, C.; Zeng, Y.; Wang, X.; Xu, G.; Wang, X. Polar Order Evolutions near the Rhombohedral to Pseudocubic and Tetragonal to Pseudocubic Phase Boundaries of the BiFeO3-BaTiO3 System. Materials 2015, 8, 8355-8365.

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