用定向凝固技术制备了择优方向为[112]的0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3高性能定向压电陶瓷.该陶瓷[112]方向的取向度约为35%, 准静态压电常数d33约为1500~1600 pC/N, 耦合系数kt~0.51, k33~0.82, 22kV/cm时的场致应变约为0.23%.
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