High Performance Grain-oriented 0.7Pb(Mg_(1/3)Nb_(2/3))O_3-0.3PbTiO_3 Piezoelectric Ceramics

High performance grain-oriented 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 ceramics were prepared by the directional solidification method, of which the preferential orientation is [112], and the orientation degree is about 35%, the quasistatic d33 is about 1500-1600pC/N, coupling factors kt is 0.51 and k33 is 0.82, and the strain is 0.23% under 22kV/cm electric field.