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Frequency-dependence of large-signal properties in lead-free piezoceramics

Dittmer, Robert and Jo, Wook and Aulbach, Emil and Granzow, Torsten and Rödel, Jürgen (2012):
Frequency-dependence of large-signal properties in lead-free piezoceramics.
In: Journal of Applied Physics, pp. 014101 (1-7), 112, (1), ISSN 00218979,
[Online-Edition: http://dx.doi.org/10.1063/1.4730600],
[Article]

Abstract

The dependence of large signal properties of (1−x)(0.81Bi1/2Na1/2TiO3-0.19Bi1/2K1/2TiO3)-xBi(Zn1/2Ti1/2)O3 with x = 0.02, 0.03, and 0.04 on the measurement frequency was investigated for a wide range of frequencies from 0.1 Hz to 100 Hz. A significant frequency dispersion in the characteristic parameters representatively maximum and coercive values was denoted. On extension with the temperature dependent dielectric permittivity measurement, it was shown that the observed frequency dependence is primarily correlated with the dynamics of field-induced phase transition from a relaxor state to a long-range ferroelectric state. Increasing the substitutional disorder introduced by Bi(Zn1/2Ti1/2)O3 addition was demonstrated to pronounce the frequency dependence. It was proposed that the change be due to the increase in random fields and consequent dominance of ergodicity, based on the frequency-dependent hysteresis measurements at an elevated temperature above so-called induced-ferroelectric-to-relaxor transition temperature.

Item Type: Article
Erschienen: 2012
Creators: Dittmer, Robert and Jo, Wook and Aulbach, Emil and Granzow, Torsten and Rödel, Jürgen
Title: Frequency-dependence of large-signal properties in lead-free piezoceramics
Language: English
Abstract:

The dependence of large signal properties of (1−x)(0.81Bi1/2Na1/2TiO3-0.19Bi1/2K1/2TiO3)-xBi(Zn1/2Ti1/2)O3 with x = 0.02, 0.03, and 0.04 on the measurement frequency was investigated for a wide range of frequencies from 0.1 Hz to 100 Hz. A significant frequency dispersion in the characteristic parameters representatively maximum and coercive values was denoted. On extension with the temperature dependent dielectric permittivity measurement, it was shown that the observed frequency dependence is primarily correlated with the dynamics of field-induced phase transition from a relaxor state to a long-range ferroelectric state. Increasing the substitutional disorder introduced by Bi(Zn1/2Ti1/2)O3 addition was demonstrated to pronounce the frequency dependence. It was proposed that the change be due to the increase in random fields and consequent dominance of ergodicity, based on the frequency-dependent hysteresis measurements at an elevated temperature above so-called induced-ferroelectric-to-relaxor transition temperature.

Journal or Publication Title: Journal of Applied Physics
Volume: 112
Number: 1
Uncontrolled Keywords: bismuth compounds, dielectric hysteresis, ferroelectric ceramics, ferroelectric transitions, long-range order, permittivity, piezoceramics, potassium compounds, relaxor ferroelectrics, sodium compounds
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A1: Manufacturing of ceramic, textured actuators with high strain
11 Department of Materials and Earth Sciences > Material Science
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 03 Jul 2012 08:12
Official URL: http://dx.doi.org/10.1063/1.4730600
Additional Information:

SFB 595 A1

Identification Number: doi:10.1063/1.4730600
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