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Temperature dependence of the complete material coefficients matrix of soft and hard doped piezoelectric lead zirconate titanate ceramics

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4 Author(s)
Georges Sabat, Ribal ; Department of Physics, Royal Military College of Canada, Kingston, Ontario K7K 7B4, Canada ; Mukherjee, B.K. ; Ren, Wei ; Guomao Yang

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2560441 

We have used resonance methods to determine the variation of all the independent piezoelectric, elastic, and dielectric material coefficients, as well as the corresponding electromechanical coupling factors, of soft and hard doped piezoelectric lead zirconate titanate (PZT) ceramics with compositions near the morphotropic phase boundary, as a function of temperature ranging between -165 and 195 °C. The material coefficients were obtained by analyzing the fundamental resonance of the impedance or admittance spectra as a function of frequency for several sample resonance geometries. The piezoelectric coefficients d33, -d31, and d15, as well as the dielectric permittivity coefficients ε11T and ε33T, generally increased with temperature for both soft and hard PZT samples. However, the elastic compliance coefficients s11E, -s12E, s33E, and s55E exhibited abnormal variations seen as broad peaks over parts of the tested temperature range. Additionally, thermal hystereses were observed in all the studied material coefficients over the temperature cycle. Finally, it was noted that, overall, the material coefficients of soft PZT varied significantly more than those of hard PZT under changing temperature conditions.

Published in:

Journal of Applied Physics  (Volume:101 ,  Issue: 6 )

Date of Publication:

Mar 2007

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