Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 26, Issue 1-2, Pages 89-93Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2004.10.022
Keywords
Bi(Mg,W)O-3; PbTiO3; ferroelectric properties; piezoelectric properties; Curie temperature
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An investigation was made into the Bi(Mg0.75W0.25)O-3-PbTiO3 (BMW-PT) system. The aim was to find the optimum composition with respect to piezoelectric and dielectric properties and link this to the presence of a morphotropic phase boundary (MPB). The optimum composition was found to be 62 mol% PT. The maximum values of the piezoelectric constant d(33) = 150 pm/V and the maximum relative dielectric constant epsilon(33)/epsilon(0) = 1400. The dielectric loss is high with tan 6 typically similar to 5%. Results from capacity versus the temperature measurements indicate a Curie temperature of 220 degrees C, which is significantly lower than the predicted value. (c) 2004 Elsevier Ltd. All rights reserved.
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