Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 6, Pages 6707-6712Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.110
Keywords
Electrical properties; Lead-free piezoelectric ceramic; Temperature stability; Electroceramics
Categories
Funding
- National Nature Science Foundation of China [61261012]
- Guangxi Science Foundation [2010GXNSFD013007, 2010GXNSFB013010]
- Guangxi Education Department Foundation [201012MS083]
- Guangxi Key Laboratory of Information Materials [1110908-09-Z]
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Lead-free high-temperature ceramics with compositions of 0.71BiFe(1-x)(Zn1/2Ti1/2)(x)O-3-0.29BaTiO(3) (BFZT(x)-BT, x=0-0.05 mol fraction) were fabricated by a conventional solid state reaction method. The effect of Bi(Zn1/2Ti1/2)O-3 (BZT) addition on the microstructure, electrical properties, relaxor behavior, and temperature stability has been studied. XRD patterns revealed that all compositions formed a single perovskite phase of pseudo-cubic crystal structure. The grain size was slightly affected by BZT addition. The diffuse phase transition and strong frequency dispersion of dielectric permittivity are observed for BZT modified ceramics. The addition of BZT into BFZT(x)-BT was also found to affect the piezoelectric properties and temperature stability of the ceramics with maximum values observed for x=0.5% and 1% BFZT(x)-BT compositions, respectively. The optimum piezoelectric properties with d(33)=163 pC/N, together with high-temperature stability with a depolarization temperature T-d similar to 380 degrees C, reveal the BFZT(x)-BT ceramics to be promising high-temperature Pb-free piezoelectric materials. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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