J. Phys. IV France
Volume 128, September 2005
Page(s) 13 - 17

J. Phys. IV France 128 (2005) 13-17

DOI: 10.1051/jp4:2005128003

Piezoelectric properties of BiFeO3 - PbTiO3 ceramics

T.P. Comyn, T. Stevenson and A.J. Bell

Institute for Materials Research, University of Leeds, LS2 9JT, UK

Ceramics of type (BiFeO $_{3})_{\rm x}$ (PbTiO $_{3})_{1 \hbox{-}
\rm x}$ have been fabricated using conventional mixed oxide synthesis. The strain field (xE)/polarisation field (PE) behaviour of compositions x = 0.80, 0.70, 0.65 and 0.60 have been studied. At high field strengths, piezoelectricity can be instilled in these materials. The composition x = 0.70 is observed to be the most active of those studied, with a total strain of 0.22% and a d33 of 160 pm V-1 using an electric field strength of 18 MV m-1. It is not possible to determine the magnitude of the coercive field using the PE data in these materials. The most active composition is observed to lie outside the mixed phase region.

© EDP Sciences 2005