Ferroelectric relaxor properties of (1 − x)K0.5Na0.5NbO3–xBa0.5Ca0.5TiO3 ceramics
The Ba0.5Ca0.5TiO3 (BCT) composition dependent dielectric and structural properties of (1−x)K0.5Na0.5NbO3–xBa0.5Ca0.5TiO3 powders were investigated. Room temperature x-ray diffraction revealed the powder structure to transform from orthorhombic to cubic with increasing BCT composition. The frequency...
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Veröffentlicht in: | Current applied physics 2012, 12(5), , pp.1266-1271 |
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Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The Ba0.5Ca0.5TiO3 (BCT) composition dependent dielectric and structural properties of (1−x)K0.5Na0.5NbO3–xBa0.5Ca0.5TiO3 powders were investigated. Room temperature x-ray diffraction revealed the powder structure to transform from orthorhombic to cubic with increasing BCT composition. The frequency dependent dielectric constant measurements revealed a shift in the temperature of the maximum dielectric constant for at frequencies, suggesting that the system exhibits ferroelectric relaxor behavior. The system containing 15% BCT showed the closest calculated Curie–Weiss exponent to 2, which the exponent for a relaxor ferroelectric.
► The physical properties of Pb-free relaxor ferroelectric ceramics are studied. ► Room temperature XRD revealed the structure to transform with BCT concentration. ► 15% of BCT sample showed the closest calculated Curie–Weiss exponent to 2. |
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ISSN: | 1567-1739 1878-1675 |
DOI: | 10.1016/j.cap.2012.03.006 |