Fabrication of (111)-oriented Tetragonal BaTiO 3 Ceramics by an Electrophoretic Deposition in a High Magnetic Field

Abstract

(111)-oriented tetragonal barium titante (BaTiO 3 , BT) ceramics with the degree of (111) orientation of 100 % were fabricated by sintering (001)-oriented hexagonal BT accumulations prepared by a magnetic field assisted electrophoretic deposition (EPD) method. Apparent piezoelectric constant d 33 * value calculated from the slope of a unipolar strain vs. electric field curve of the (111)-oriented tetragonal BT ceramics was 597 pm/V, which was larger than that of randomly oriented ceramics (d 33 * = 460 pm/V). This enhancement was associated with an electric field induced phase transition.