Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 11, Pages 12694-12700Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.05.020
Keywords
BCZT ceramic; Microstructure; Dielectric property; Ferroelectric property; Piezoelectric coefficient
Categories
Funding
- National High-tech R&D Program of China [2015AA034102]
- National Natural Science Foundation of China [61171047, 51372031, 51132003]
- Science and Technology Department of Sichuan Province [2014GZ0015, 2015GZ0227]
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals [SKL-SPM-201535, SKL-SPM-201548]
- Science & Technology Program of Yunnan Province [2014DC019, C0120150089]
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Addition of CaO-B2O3-SiO2 (CBS) glass was performed to lower the sintering temperature of lead-free Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) ceramics. Orthorhombic and tetragonal phases coexisted in CBS-free BCZT ceramics. The BCZT ceramics transformed into a pseudo-cubic phase when sintered at 1300 degrees C with increasing CBS glass content. Additionally, the secondary phase, Ba2TiSi2O8, was observed when CBS glass was added. The density initially increased, reached a maximum value with 2 wt% CBS glass, and then decreased rapidly with further increase in CBS glass content, which was consistent with the microstructure. The epsilon, T-c, P-r, and d(33) depend on microstructure, and the results agree with the density. Evident relaxation behavior was observed. Observed results were inferred to be dependent on the microstructure, phase structure, lattice distortion, and secondary phase. The sample with 2 wt% CBS glass showed the excellent performance, which could be a promising substitute to lead-free piezoelectric ceramics for lead-based materials. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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