Effects of phase composition and grain size on the piezoelectric properties of HfO2-doped barium titanate ceramics

The effect of grain size and phase compositions on piezoelectric coefficient of BaTi 0.98 Hf 0.02 O 3 ceramics prepared at a series of sintering temperatures (1320, 1350, 1370, and 1400 °C) was studied. The results showed that the grain size of the ceramics is 0.9, 21.3, 21.6, and 37.2 μm, respectiv...

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Bibliographic Details
Published in:Journal of materials science 2019-10, Vol.54 (19), p.12392-12400
Main Authors: Yin, Hong-Mei, Xu, Wen-Jun, Zhou, Heng-Wei, Zhao, Xing-Yu, Huang, Yi-Neng
Format: Article
Language:English
Subjects:
Barium titanates
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Coefficients
Composition effects
Crystallography and Scattering Methods
Grain size
Hafnium oxide
Materials Science
Phase composition
Piezoelectricity
Polymer Sciences
Solid Mechanics
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Summary:The effect of grain size and phase compositions on piezoelectric coefficient of BaTi 0.98 Hf 0.02 O 3 ceramics prepared at a series of sintering temperatures (1320, 1350, 1370, and 1400 °C) was studied. The results showed that the grain size of the ceramics is 0.9, 21.3, 21.6, and 37.2 μm, respectively, and the corresponding phase compositions are the tetragonal–orthogonal, tetragonal–orthogonal–rhombohedral, tetragonal–orthogonal, and tetragonal–orthogonal–rhombohedral, while the piezoelectric coefficient is 475, 352, 258, and 327 pC/N, i.e., it decreases first and then increases as the grain size goes up. The phase compositions and grain size of the ceramics are interrelated, and they co-affect the piezoelectric coefficient.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-019-03726-y