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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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Compositional dependence of dielectric and ferroelectric properties in BiFeO3-BaTiO3 solid solutions

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Title
Compositional dependence of dielectric and ferroelectric properties in BiFeO3-BaTiO3 solid solutions
Author
Zhang, HailongJo, WookWang, KeWebber, Kyle G
Keywords
A. Powders: solid state reaction; C. Dielectric properties; C. Ferroelectric properties; D. BaTiO3 and titanates
Issue Date
2014-04
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v.40, no.3, pp.4759 - 4765
Abstract
Polycrystalline (1-x)BiFeO3-xBaTiO(3) (0.11 <= x <= 0.5) ceramics have been prepared by the solid-state reaction method to investigate their phase structure, dielectric, ferroelectric, and field-induced strain behaviors. The phase was found to change from rhombohedral in BiFeO3-rich compositions to pseudocubic at a BaTiO3 content of x=0.33. The room-temperature dielectric permittivity increased with increasing BaTiO3 content regardless of phase structure, except for a small dielectric permittivity peak additionally observed at x=0.33. The (1-x)BiFeO3-xBaTiO(3) solid solutions displayed a maximum in permittivity at temperatures (T-m) above 300 degrees C in the compositional range of 0.2 <= x <= 0.5. The frequency dependence of high-temperature dielectric properties suggests that BiFeO3-BaTiO3 is a relaxor ferroelectric. Normal ferroelectric loops and large electric field-induced strains were observed for the BiFeO3-BaTiO3 ceramics. The BiFeO3-BaTiO3 shows a promising candidate for high temperature ferroelectric applications.
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DOI
10.1016/j.ceramint.2013.09.020
ISSN
0272-8842
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MSE_Journal Papers
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