Synthesis and properties of perovskite BiFeO3-K0.5Na0.5NbO3 ceramics by solid-state reaction
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- FURUHASHI Takashi
- Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University
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- MORIYA Makoto
- Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University
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- SAKAMOTO Wataru
- Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University
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- YOGO Toshinobu
- Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University
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Abstract
Rhombohedrally distorted perovskite BiFeO3–K0.5Na0.5NbO3 ceramics with ferroelectricity and ferromagnetism were synthesized by solid-state reaction. The effect of K0.5Na0.5NbO3 content on the crystal structure, electrical and magnetic properties of a BiFeO3–K0.5Na0.5NbO3 system was examined with a view to achieving multiferroic BiFeO3-based ceramics. Perovskite BiFeO3–K0.5Na0.5NbO3 single phase was obtained by formation of solid solution with K0.5Na0.5NbO3, whereas pure BiFeO3 ceramics contained a small amount of a second phase, such as Bi36Fe2O57. The crystallographic symmetry of BiFeO3–K0.5Na0.5NbO3 changed from rhombohedral to cubic when the content of K0.5Na0.5NbO3 exceeded 15 mol %. The rhombohedrally distorted BiFeO3–K0.5Na0.5NbO3 showed a high Curie temperature (>770°C) and weak ferromagnetism at room temperature. Dielectric properties of the resultant ceramics were improved by controlling the amount of Mn doping to facilitate ferroelectric measurements.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 118 (1380), 701-705, 2010
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205286855680
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- NII Article ID
- 130000304620
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- NII Book ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL BIB ID
- 10770756
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed