Relaxor properties of Ba0.9Bi0.067 (Ti1-xZrx)O3 ceramics

Starting from the well-known ferroelectric material BaTiO3, we show that coupled substitutions at the Ba and Ti cationic sites are able to improve the material properties. The compositions Ba0.9Bi0.067(Ti1-xZrx)O3 display a relaxor behaviour close to room temperature which open the way for possible...

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Veröffentlicht in:	Solid state sciences 2005-08, Vol.7 (8), p.925-930
Hauptverfasser:	SIMON, Annie, RAVEZ, Jean, MAGLIONE, Mario
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemical Sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Crystalline state (including molecular motions in solids) Dielectric, piezoelectric, ferroelectric and antiferroelectric materials Dielectrics, piezoelectrics, and ferroelectrics and their properties Exact sciences and technology Material chemistry Physics Structure of solids and liquids crystallography Structure of specific crystalline solids Theory of crystal structure, crystal symmetry calculations and modeling
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Beschreibung
Zusammenfassung:	Starting from the well-known ferroelectric material BaTiO3, we show that coupled substitutions at the Ba and Ti cationic sites are able to improve the material properties. The compositions Ba0.9Bi0.067(Ti1-xZrx)O3 display a relaxor behaviour close to room temperature which open the way for possible use of it for capacitor applications. The origin of such optimization is related to the Bi cations which share similar electronic structure with Pb without raising environmental concerns related to the volatility of PbO. In addition, we have found a very peculiar transition sequence in this compound from paraelectric to ferroelectric and then to relaxor on cooling.
ISSN:	1293-2558 1873-3085
DOI:	10.1016/j.solidstatesciences.2005.04.009