Temperature dependence of the complete material coefficients matrix of soft and hard doped piezoelectric lead zirconate titanate ceramics
- Department of Physics, Royal Military College of Canada, Kingston, Ontario K7K 7B4 (Canada)
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 degree sign 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 d{sub 33}, -d{sub 31}, and d{sub 15}, as well as the dielectric permittivity coefficients {epsilon}{sub 11}{sup T} and {epsilon}{sub 33}{sup T}, generally increased with temperature for both soft and hard PZT samples. However, the elastic compliance coefficients s{sub 11}{sup E}, -s{sub 12}{sup E}, s{sub 33}{sup E}, and s{sub 55}{sup E} 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.
- OSTI ID:
- 20982769
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 101; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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