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BIJALWAN, V. PRAJZLER, V. ERHART, J. TAN, H. ROUPCOVÁ, P. SOBOLA, D. TOFEL, P. MACA, K.
Original Title
Rapid pressure-less and spark plasma sintering of (Ba0.85Ca0.15Zr0.1T0.9)O3 lead-free piezoelectric ceramics
Type
journal article in Web of Science
Language
English
Original Abstract
This work shows for the first time the possibility to sinter BCZT powder compacts by rapid heating rates within one hour of sintering, while achieving good piezoelectric properties. The sintering was performed by rapid (heating rates 100 and 200 °C/min) pressure-less sintering (PLS) at 1550 °C/5-60 min and by SPS sintering (100 °C/min, 1450 °C/5−60 min and 1500 °C/15−45 min). The rapid PLS samples reached a relative density up to 94 % and grain sizes of 17–36 μm acquiring d33 up to 414 pC/N. Although the SPS samples reached full density at 1450 °C, their piezoelectric properties worsened due to smaller grains (10−15 μm) as well as formation of cracks at dwell times > 30 min. At elevated SPS temperature of 1500 °C/30 min, the d33 increased to 360 pC/N sustaining full density. Even higher increase in d33 (424 pC/N) of SPS samples was achieved by post-rapid PLS at 1550 °C/60 min resulting from further expansion in grain size.
Keywords
Lead-free piezoceramics; Microstructure; Piezoelectric constant; Rapid pressure-less sintering; SPS
Authors
BIJALWAN, V.; PRAJZLER, V.; ERHART, J.; TAN, H.; ROUPCOVÁ, P.; SOBOLA, D.; TOFEL, P.; MACA, K.
Released
1. 4. 2021
ISBN
0955-2219
Periodical
Journal of the European Ceramic Society
Year of study
41
Number
4
State
United Kingdom of Great Britain and Northern Ireland
Pages from
2514
Pages to
2523
Pages count
10
URL
https://www.sciencedirect.com/science/article/pii/S0955221920309286?via%3Dihub
BibTex
@article{BUT169317, author="Vijay {Bijalwan} and Vladimír {Prajzler} and Jiří {Erhart} and Hua {Tan} and Pavla {Roupcová} and Dinara {Sobola} and Pavel {Tofel} and Karel {Maca}", title="Rapid pressure-less and spark plasma sintering of (Ba0.85Ca0.15Zr0.1T0.9)O3 lead-free piezoelectric ceramics", journal="Journal of the European Ceramic Society", year="2021", volume="41", number="4", pages="2514--2523", doi="10.1016/j.jeurceramsoc.2020.11.029", issn="0955-2219", url="https://www.sciencedirect.com/science/article/pii/S0955221920309286?via%3Dihub" }