From ferroelectric to relaxor behaviour in the Aurivillius-type Bi<subscript>4−x</subscript>Ba<subscript>x</subscript>Ti<subscript>3−x</subscript>Nb<subscript>x</subscript>O<subscript>12</subscript> (0≤x≤1.4) solid solutions
In: Materials Letters, Jg. 59 (2005-02-01), Heft 2/3, S. 376-382
Online
academicJournal
Zugriff:
Abstract: Solid solutions of the Aurivillius-type compounds with Bi4−xBaxTi3−xNbxO12 formula were prepared by solid-state reaction of the constitutive oxides at optimised temperatures. The room temperature structural data were obtained from X-ray diffraction (XRD). The solubility limit of (Ba, Nb) was estimated to x=1.4. The dielectric properties of sintered ceramics were investigated in wide temperature (25–800 °C) and frequency (1 kHz–1 MHz) ranges. For low substitution rates (0≤x≤0.4) the compounds behave as normal ferroelectrics with Curie temperature decreasing with increasing x. For x≥0.6, the materials exhibit a ferroelectric relaxor-type behaviour which was correlated to the relaxation of polar clusters induced by the heterovalent substitution on Bi and Ti sites. [Copyright &y& Elsevier]
| Titel: |
From ferroelectric to relaxor behaviour in the Aurivillius-type Bi<subscript>4−x</subscript>Ba<subscript>x</subscript>Ti<subscript>3−x</subscript>Nb<subscript>x</subscript>O<subscript>12</subscript> (0≤x≤1.4) solid solutions
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| Autor/in / Beteiligte Person: | Jennet, D. Ben ; Marchet, P. ; El Maaoui, M. ; Mercurio, J.P. |
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| Zeitschrift: | Materials Letters, Jg. 59 (2005-02-01), Heft 2/3, S. 376-382 |
| Veröffentlichung: | 2005 |
| Medientyp: | academicJournal |
| ISSN: | 0167-577X (print) |
| DOI: | 10.1016/j.matlet.2004.10.020 |
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