Origin of the large strain response in (K0.5Na0.5)NbO3-modified (Bi0.5Na0.5)TiO3–BaTiO3 lead-free piezoceramics

By W. Jo, T. Granzow, E. Aulbach, J. Rödel, Dragan Damjanovic. Journal of Applied Physics, 2009

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The mechanism of the giant unipolar strain recently observed in a lead-free piezoceramic, 0.92(Bi0.5Na0.5)TiO3−0.06BaTiO3−0.02(K0.5Na0.5)NbO3 [S.-T. Zhang, A. B. Kounga, E. Aulbach, H. Ehrenberg, and J. Rodel, Appl. Phys. Lett. 91, 112906 (2007) was investigated. The validity of the previously proposed mechanism that the high strain comes both from a significant volume change during the field-induced phase transition, from an antiferroelectric to a ferroelectric phase and the domain contribution from the induced ferroelectric phase was examined. Monitoring the volume changes from the simultaneously measured longitudinal and transverse strains on disk-shaped samples showed that the phase transition in this specific material does not involve any notable volume change, which indicates that there is little contribution from a volume change due to the phase transition to the total strain response. Temperature dependent hysteresis measurements on unpoled samples of a nearby ferroelectric composition, 0.93(Bi0.5...

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/588250cfdb3f327f7b581d4112473aee795be73b

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In Biomedical Engineering

  1. C. Ahn
  2. Hyoung‒Su Han
  3. W. Jo

In Electronic, Optical and Magnetic Materials

  1. C. Ahn
  2. Hyoung‒Su Han
  3. Byung-Yul Choi
  4. Chang-Hyo Hong
  5. Hwang-Pill Kim
  6. W. Jo
  7. J. Rödel

In Materials Chemistry

  1. C. Ahn
  2. Hyoung‒Su Han
  3. Byung-Yul Choi
  4. Chang-Hyo Hong
  5. Hwang-Pill Kim
  6. W. Jo
  7. J. Rödel

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