摘要：【中文】本发明公开了一种高温用巨电致应变陶瓷材料，其以Bi_0.5Na_0.5TiO₃和Bi_0.1Na_0.7NbO₃为基体，化学组成成分为(1‑x)Bi_0.5Na_0.5TiO₃‑xBi_0.1Na_0.7NbO₃，其中x＝0.05‑0.2，对应x＝0.1的陶瓷材料在185℃达到单极应变最大值1.6％左右，其与目前最大的单晶的应变数值相当，超出目前的含铅或无铅的压电陶瓷，具有优异的性能。并且，其电致应变曲线具有较小的滞后性，线性度较好，可以较为精确地通过相应的电场控制材料的应变数值，有望在高温压电材料领域如汽车的电控汽油喷射系统以及高温压电致动器或马达等领域中得到应用，并且可用于高温下的精确控制致动系统。 【EN】The invention discloses a giant electrostrictive strain ceramic material for high temperature, which is prepared from Bi_0.5Na_0.5TiO₃And Bi_0.1Na_0.7NbO₃Is a matrix, and the chemical composition is (1-x) Bi_0.5Na_0.5TiO₃‑xBi_0.1Na_0.7NbO₃Ceramic materials in which x is 0.05 to 0.2, corresponding to x 0.1, reach a maximum unipolar strain of about 1.6% at 185 ℃, which is comparable to the maximum current single crystal strain values, and have superior performance over current lead-containing or lead-free piezoelectric ceramics. In addition, the electrostriction curve has smaller hysteresis and better linearity, can accurately control the strain value of the material through a corresponding electric field, and is expected to be used in the field of high-temperature piezoelectric materials, such as an electric control gasoline injection system of an automobileAnd high temperature piezoelectric actuators or motors, and can be used in precision control actuation systems at high temperatures.