Fabrication of ©111-oriented BaTiO3 ceramics by high magnetic field electrophoretic deposition using hexagonal-tetragonal co-existing BaTiO3 powder

Abstract

©111ª-oriented BaTiO3 (BT) ceramics were prepared by a high magnetic field assisted electrophoretic deposition method using hexagonal-tetragonal co-existing BT powders. With increasing the hexagonal content, the ©111ª- orientation factor increased, while piezoelectric strain constant d33 increased up to the hexagonal content of 80% with attaining a maximum value of 627pmV¹1 and then rapidly decreased. In contrast, the decreasing trend of d33 with increasing hexagonal content in the randomly oriented ceramics was observed. These results were discussed with the degree of the orientation and the possible twin defects in the BT ceramics.