J. Phys. IV France 126 (2005) 73-76
Raman imaging of grain growth mechanism in highly textured Pb(Mg Nb )O-PbTiO piezoelectric ceramics*P. Colomban1 and Mai Pham Thi2
1 Laboratoire de Dynamique, Interactions et Réactivité, UMR 7075 CNRS, Université Pierre et Marie Curie, 2 rue Henry Dunant, 94320 Thiais, France
2 Thales Research & Technology France, Ceramic Materials & Devices, 91494 Orsay Cedex, France
Pb(Mg1 / 3Nb2 / 3)O3-PbTiO3 solid solution ((1-x)PMN-xPT) tape cast ceramics have been prepared by homo-epitaxial templated grain growth (HTGG) using cubic 0.75PMN-0.25 PT single crystal seeds as template (a few wt%) and x = 0.35 nanoparticles for the ceramic matrix. Raman imaging studied representative medium and highly textured ceramics. On the base of a previous study which has shown that the Raman peak centre of gravity depends on the solid solution composition whereas peak intensity is correlated to the unit-cell distortion, Raman imaging shows that the final composition and structure is very close to that of the matrix.
© EDP Sciences 2005