J. Phys. IV France 128 (2005) 13-17
Piezoelectric properties of BiFeO3 - PbTiO3 ceramicsT.P. Comyn, T. Stevenson and A.J. Bell
Institute for Materials Research, University of Leeds, LS2 9JT, UK
Ceramics of type (BiFeO (PbTiO 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