PROPERTIES OF PbFe2/3W1/3O3-PbTiO3 SYSTEM IN THE RANGE OF MORPHOTROPIC PHASE BOUNDARY

The solid solution (1-x)Pb(Fe2/3W1/3)O3-xPbTiO3 with x ranging from 0.0 to 1.0 was investigated at T=300 K in order to determine the composition range corresponding to the morphotropic phase boundary. A change from pseudo-cubic to tetragonal symmetry was found with increasing x. The cell parameters...

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Published in:Jpn.J.Appl.Phys ,Part 1. Vol. 41, no. 11B, pp. 7015-7020. 2002 Part 1. Vol. 41, no. 11B, pp. 7015-7020. 2002, 2002-11, Vol.41 (11B), p.7015-7020
Main Authors: Mitoseriu, L, Vilarinho, P M, Baptista, J L
Format: Article
Language:English
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Summary:The solid solution (1-x)Pb(Fe2/3W1/3)O3-xPbTiO3 with x ranging from 0.0 to 1.0 was investigated at T=300 K in order to determine the composition range corresponding to the morphotropic phase boundary. A change from pseudo-cubic to tetragonal symmetry was found with increasing x. The cell parameters depend on the PbTiO3 amount. In the range of compositions from x=0.20 to x=0.37, both pseudo-cubic and tetragonal phases coexist, with different relative amounts. Ir and Raman experiments confirmed a continuous change in the local ordering of the system. A transition from relaxor to normal ferroelectric behaviour with increasing PbTiO3 addition was shown by the dielectric data. 25 refs.
ISSN:0021-4922