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Temperature Dependence of the Piezoelectric Coefficient in BiMeO3-PbTiO3 (Me = Fe, Sc, (Mg1/2Ti1/2)) Ceramics

Leist, Thorsten and Chen, Jun and Jo, Wook and Aulbach, Emil and Suffner, Jens and Rödel, Jürgen and Zhang, S. (2012):
Temperature Dependence of the Piezoelectric Coefficient in BiMeO3-PbTiO3 (Me = Fe, Sc, (Mg1/2Ti1/2)) Ceramics.
95, In: Journal of the American Ceramic Society, (2), pp. 711-715, ISSN 00027820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2011.04848.x],
[Article]

Abstract

The piezoelectric coefficient of high temperature piezoelectric ceramics, denoted as Bi(Me)O3-PbTiO3, (Me = Fe, Sc, (Mg1/2Ti1/2)) was investigated as a function of temperature by using a custom-designed test frame. Utilizing laser vibrometry, it was possible to assess the piezoelectric coefficient in situ in the range from room temperature to 500°C. The constraints on the sample geometry as they exist in the commonly used resonance/antiresonance technique such as those encountered during poling were circumvented by the use of the converse piezoelectric effect. Comparison with literature data revealed that the current method is a useful alternative for determining the depolarization temperature (Td), defined as the inflection point in a temperature-dependent d33 plot. Measured Td for each poled specimen was compared with that determined by dielectric permittivity as well as temperature-dependent X-ray diffraction data to understand a possible origin of Td. It was also shown that Td matches with the temperature where the dielectric anomaly initiates, and hence Td from the d33 measurement is consistently lower than that from the dielectric permittivity measurement. It is proposed that this discrepancy in the position of Td is due to the fact that the depolarization occurs in two steps.

Item Type: Article
Erschienen: 2012
Creators: Leist, Thorsten and Chen, Jun and Jo, Wook and Aulbach, Emil and Suffner, Jens and Rödel, Jürgen and Zhang, S.
Title: Temperature Dependence of the Piezoelectric Coefficient in BiMeO3-PbTiO3 (Me = Fe, Sc, (Mg1/2Ti1/2)) Ceramics
Language: English
Abstract:

The piezoelectric coefficient of high temperature piezoelectric ceramics, denoted as Bi(Me)O3-PbTiO3, (Me = Fe, Sc, (Mg1/2Ti1/2)) was investigated as a function of temperature by using a custom-designed test frame. Utilizing laser vibrometry, it was possible to assess the piezoelectric coefficient in situ in the range from room temperature to 500°C. The constraints on the sample geometry as they exist in the commonly used resonance/antiresonance technique such as those encountered during poling were circumvented by the use of the converse piezoelectric effect. Comparison with literature data revealed that the current method is a useful alternative for determining the depolarization temperature (Td), defined as the inflection point in a temperature-dependent d33 plot. Measured Td for each poled specimen was compared with that determined by dielectric permittivity as well as temperature-dependent X-ray diffraction data to understand a possible origin of Td. It was also shown that Td matches with the temperature where the dielectric anomaly initiates, and hence Td from the d33 measurement is consistently lower than that from the dielectric permittivity measurement. It is proposed that this discrepancy in the position of Td is due to the fact that the depolarization occurs in two steps.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 95
Number: 2
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 03 Feb 2012 08:41
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2011.04848.x
Identification Number: doi:10.1111/j.1551-2916.2011.04848.x
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