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BIJALWAN, V. TOFEL, P. HOLCMAN, V.
Original Title
Grain size dependence of the microstructures and functional properties of (Ba0.85 Ca0.15–x Cex) (Zr0.1 Ti0.9) O3 lead-free piezoelectric ceramics
Type
journal article in Web of Science
Language
English
Original Abstract
By the solid-state reaction route, (Ba0.85Ca0.15-x Cex) (Zr0.1Ti0.9) O3 (BCCeZT) lead-free piezoelectric ceramics were prepared. The powder was processed at 1250 ºC for 2 h, and compacted green bodies were then sintered at various sintering temperatures. X-ray diffraction analysis and Raman spectra confirmed the rhombohedral-tetragonal phase coexistence of x = 0–0.00131. Addition of CeO2 facilitated development of grain sizes greater than 10 μm at low sintering temperatures. The effects of grain size on the ferroelectric and piezoelectric properties were studied systematically and it was found that a ~ (10–12) μm grain size is critical for the processing of high-performance lead-free BCCeZT ceramics. CeO2 substitution at the A site may bring down the sintering temperature by about 200 °C without significant loss of properties. The best properties were obtained for x = 0.00131 at a low sintering temperature of 1350°C for 4 h exhibiting d33 = 501 ± 10 pC/N, kp = 38.5 ± 1.92 %, Pr = 12.19 μC/cm2, TC = 108.1°C, and a large strain of 0.14%. These results show that BCCeZT ceramics could be promising candidates for the fabrication of lead-free devices.
Keywords
Lead-free ceramics, sintering, grain size, piezoelectric properties, micro- structure
Authors
BIJALWAN, V.; TOFEL, P.; HOLCMAN, V.
Released
8. 11. 2018
ISBN
2187-0764
Periodical
Journal of Asian Ceramic Societies
Year of study
6
Number
4
State
Japan
Pages from
384
Pages to
393
Pages count
9
URL
http://dx.doi.org/10.1080/21870764.2018.1539211
BibTex
@article{BUT151552, author="Vijay {Bijalwan} and Pavel {Tofel} and Vladimír {Holcman}", title="Grain size dependence of the microstructures and functional properties of (Ba0.85 Ca0.15–x Cex) (Zr0.1 Ti0.9) O3 lead-free piezoelectric ceramics", journal="Journal of Asian Ceramic Societies", year="2018", volume="6", number="4", pages="384--393", doi="10.1080/21870764.2018.1539211", issn="2187-0764", url="http://dx.doi.org/10.1080/21870764.2018.1539211" }