Effect of Zr4+ substitution on thermal stability and electrical properties of high temperature BiFe0.99Al0.01O3aBaTi1axZrxO3 ceramics

High-temperature Pb-free ceramics of 0.72BiFe0.99Al0.01O3a0.28BaTi1axZrxO3 (BFAaBZxT) have been prepared through solid state reaction route. The influence of the Zr4+ substitution for Ti4+ on microstructure, thermal stability and electrical properties of the BFAaBZxT ceramics was investigated. The r...

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Published inJournal of alloys and compounds Vol. 567; pp. 110 - 114
Main Authors Cen, Zhenyong, Zhou, Changrong, Cheng, Jun, Zhou, Xiujuan, Li, Weizhou, Yan, Chunle, Feng, Songlin, Liu, Yueqiang, Lao, Daosong
Format Journal Article
LanguageEnglish
Published 01.08.2013
Subjects
Ceramics
Electrical properties
Grain size
Optimization
Phase boundaries
Piezoelectricity
Solid solutions
Thermal stability
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Summary:High-temperature Pb-free ceramics of 0.72BiFe0.99Al0.01O3a0.28BaTi1axZrxO3 (BFAaBZxT) have been prepared through solid state reaction route. The influence of the Zr4+ substitution for Ti4+ on microstructure, thermal stability and electrical properties of the BFAaBZxT ceramics was investigated. The results showed single-phase solid solutions occurred for compositions x = 0a0.12 and a morphotropic phase boundary (MPB) separating rhombohedral and pseudocubic phases existed near x = 0.03. The substitution of Zr4+ for Ti4+ caused significant change of grain size for BFAaBZxT ceramics. The optimum piezoelectric properties of d33 = 157 pC/N, kp = 0.33, combined with improved depoling temperature Td = 425 degree C, are obtained around the MPB composition of x = 0.03. The results indicate that BFAaBZxT ceramics have a great potential to apply in high temperature field.
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ISSN:0925-8388
DOI:10.1016/j.jallcom.2013.03.065