Structural and ferroelectric behavior of aurivillius related oxides Bi2-xPbxSrNb2O9-x/2 (O ≤ × ≤ 2)
- 1 March 1994
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 153 (1) , 255-260
- https://doi.org/10.1080/00150199408016576
Abstract
New substituted compounds of composition *Bi2-xPbxSrNb2O9-x/2 (O≤x≤2) have been isolated as single phases, keeping the basic structure of the Aurivillius oxides. These materials were characterized by X-ray powder diffraction methods, at different temperatures up to 850 °C, showing crystallographic transformations which could be related with a ferroelectric behavior. Measurements of the dielectric constant (ε = ε′'+ iε″'') as a function of the temperature for x = 1 and x = 1.5 compositions show an anomalous behavior in the real component, that could confirm the existence of a phase transition.Keywords
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