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Author

Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Effect of Texture on Temperature-Dependent Properties of K0.5Na0.5NbO3 Modified Bi1/2Na1/2TiO3-xBaTiO(3)

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Title
Effect of Texture on Temperature-Dependent Properties of K0.5Na0.5NbO3 Modified Bi1/2Na1/2TiO3-xBaTiO(3)
Author
Fancher, Chris M.Jo, WookRoedel, JuergenBlendell, John E.Bowman, Keith J.
Keywords
FREE PIEZOELECTRIC CERAMICS; TEMPLATED GRAIN-GROWTH; TITANATE NA1/2BI1/2TIO3-BATIO3 CERAMICS; LEAD-FREE PIEZOCERAMICS; STRAIN; NA0.5BI0.5TIO3; PERSPECTIVE; ACTUATORS; PARTICLES
Issue Date
201408
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.97, no.8, pp.2557 - 2563
Abstract
Textured (1-x-y)Bi1/2Na1/2TiO3-xBaTiO(3)-yK(0.5)Na(0.5)NbO(3) (BNT-100xBT-100yKNN) ceramics with a {001} pseudocubic (pc) orientation were fabricated by templated grain growth using Bi1/2Na1/2TiO3 templates. Temperature-dependent electromechanical results demonstrate that the strain response of templated BNT-xBT-yKNN ceramics is stable from room temperature (RT) to 125 degrees C. The temperature-dependent strain and polarization response are compared to randomly oriented ceramics, for BNT-100xBT-2KNN (0.05 <= x <= 0.07). Textured BNT-7BT-2KNN reached a maximum 0.47% strain response at 5 kV/mm, an almost 50% increase compared to randomly oriented BNT-7BT-2KNN. Over the temperature range RT-125 degrees C, the strain response of templated BNT-6BT-2KNN degraded from 0.38% to 0.22% (-42.1%) compared to 0.37% to 0.18% (-51.4%) for randomly oriented ceramics. The temperature-dependent strain response suggests that templated BNT-100xBT-100yKNN ceramics are well suited for elevated temperature applications.
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DOI
http://dx.doi.org/10.1111/jace.12986
ISSN
0002-7820
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