CAJ | 학술논문

采用固相反应法,制备了（1-x）BNKT2-xBCT无铅压电陶瓷.研究了BCT加入对其相结构、介电、铁电、电致应变性能的影响.实验结果表明：在设定条件下,所有样品都形成了纯的钙钛矿结构,且在x=0.04～0.08之间处于四方相和伪立方相的过渡区域.材料去极化温度趋向于室温附近.弛豫性增强（γ=1.94）,强烈削弱了材料的铁电性,使得剩余极化强度和压电系数减小很多.在x=0.04组分附近应变量达到最大值（0.122%）,d33＊达到230pm/V.
채용고상반응법,제비료（1-x）BNKT2-xBCT무연압전도자.연구료BCT가입대기상결구、개전、철전、전치응변성능적영향.실험결과표명：재설정조건하,소유양품도형성료순적개태광결구,차재x=0.04～0.08지간처우사방상화위립방상적과도구역.재료거겁화온도추향우실온부근.이예성증강（γ=1.94）,강렬삭약료재료적철전성,사득잉여겁화강도화압전계수감소흔다.재x=0.04조분부근응변량체도최대치（0.122%）,d33＊체도230pm/V.
The（1-x）BNKT2-xBCT lead free ceramics are prepared by the conventional solid-state sintering process.The phase components,dielectric,ferroelectric properties and electric field-induced strain with BCT are investigated.It is indicated that under the demanded condition all samples are pure perovskite structure,tetragonal and pseudo-cubic phase transition region exists in the range of x=0.04 to 0.08.The depolarization temperature of the material tend to room temperature and relaxation enhancements to γ=1.94.The ferroelectric of the material is weakened strongly,making the remanent polarization and piezoelectric coefficient appears significant reduction.Near the x=0.04 strain reached maximun 0.122%,d33＊ reached 230 pm/V.