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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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Temperature-Dependent Phase Transitions in the Lead-Free Piezoceramics (1-x - y)(Bi1/2Na1/2)TiO3-xBaTiO(3)-y( K0.5Na0.5)NbO3 Observed by in situ Transmission Electron Microscopy and Dielectric Measurements

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Title
Temperature-Dependent Phase Transitions in the Lead-Free Piezoceramics (1-x - y)(Bi1/2Na1/2)TiO3-xBaTiO(3)-y( K0.5Na0.5)NbO3 Observed by in situ Transmission Electron Microscopy and Dielectric Measurements
Author
Kling, JensJo, WookDittmer, RobertSchaab, SilkeKleebe, Hans-Joachim
Keywords
Dielectric measurements; Evolution of the microstructure; In-situ transmission electron microscopies; Increasing temperatures; Lead free piezoceramics; Lead-free piezoelectrics; Superstructure reflections; Temperature dependent
Issue Date
2013-10
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.96, no.10, pp.3312 - 3324
Abstract
Lead-free piezoelectric (1-x-y)(Bi1/2Na1/2)TiO3-xBaTiO(3)-y(K0.5Na0.5)NbO3 (BNT-BT-KNN) ceramics were examined in situ under increasing temperature in the transmission electron microscope. Changing superstructure reflections indicate a transition from rhombohedral to tetragonal to cubic phase with broad coexistence regions. The additional evolution of the microstructure in combination with dielectric measurements leads to a model of two relaxor-type phase evolutions with temperature.
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DOI
10.1111/jace.12493
ISSN
0002-7820
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MSE_Journal Papers
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