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

Zhang, Hailong and Jo, Wook and Wang, Ke and Webber, Kyle G. (2014):
Compositional dependence of dielectric and ferroelectric properties in BiFeO3–BaTiO3 solid solutions.
In: Ceramics International, pp. 4759-4765, 40, (3), ISSN 02728842,
[Online-Edition: http://dx.doi.org/10.1016/j.ceramint.2013.09.020],
[Article]

Abstract

Polycrystalline (1−x)BiFeO3–xBaTiO3 (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–xBaTiO3 solid solutions displayed a maximum in permittivity at temperatures (Tm) above 300 °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.

Item Type: Article
Erschienen: 2014
Creators: Zhang, Hailong and Jo, Wook and Wang, Ke and Webber, Kyle G.
Title: Compositional dependence of dielectric and ferroelectric properties in BiFeO3–BaTiO3 solid solutions
Language: English
Abstract:

Polycrystalline (1−x)BiFeO3–xBaTiO3 (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–xBaTiO3 solid solutions displayed a maximum in permittivity at temperatures (Tm) above 300 °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.

Journal or Publication Title: Ceramics International
Volume: 40
Number: 3
Uncontrolled Keywords: Powders: solid state reaction; Dielectric properties; Ferroelectric properties; BaTiO3 and titanates
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 14 Apr 2014 10:46
Official URL: http://dx.doi.org/10.1016/j.ceramint.2013.09.020
Identification Number: doi:10.1016/j.ceramint.2013.09.020
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