铌酸钾钠基1-3型压电复合物的制备及其性能研究  

Study on Preparation and Properties of Sodium Potassium Niobate-Based 1-3 Piezoelectric Composites

作　　者：王琦钧 曾祥豹 周学凡 迟文潮 邹金住 张斗 WANG Qijun;ZENG Xiangbao;ZHOU Xuefan;CHI Wenchao;ZOU Jinzhu;ZHANG Dou(State Key Lab.of Powder Metallurgy,Powder Metallurgy Research Institute,Central South University,Changsha 410083,China;Chongqing Acoustics-Optics-Electronics Co.,LTD of China Electrics Technology Group Corp.,Chongqing 401332,China)

机构地区：[1]中南大学粉末冶金研究院,粉末冶金国家重点实验室,湖南长沙410083 [2]中电科技集团重庆声光电有限公司,重庆401332

出　　处：《压电与声光》2022年第4期521-525,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(52172134);湖南省创新型省份建设专项基金资助项目(2020GK2062);博士后创新人才支持计划基金资助项目(BX2021377)。

摘　　要：采用传统固相法制备了在1130℃下烧结而成的(K_(0.45)Na_(0.55))_(0.9)Li_(0.02)(Nb_(0.77)Ta_(0.18)Sb_(0.05))O_(3)(KNLNTS)无铅压电陶瓷。陶瓷致密度和电学性能较好,致密度达到98%,室温压电常数为308.7 pC/N,厚度振动机电耦合系数可达0.5,1 kHz时介电损耗为0.043。以上述KNLNTS基粉体为原料,利用切割填充法制备1-3型压电复合材料并研究了厚度对复合材料的性能影响。结果表明,复合材料的压电常数、厚度振动机电耦合系数均随厚度的增加而增加,介电损耗随厚度的增加而减少,而相对介电常数基本保持不变。The(K_(0.45)Na_(0.55))_(0.9)Li_(0.02)(Nb_(0.77)Ta_(0.18)Sb_(0.05))O_(3)(KNLNTS)lead-free piezoelectric ceramics is synthesized by the traditional solid-state method with the sintering temperature of 1130℃.The ceramic samples have good density and electric properties,with a density of 98%,a piezoelectric constant of 308.7 pC/N,thickness vibration electromechanical coupling factor of 0.5,and dielectric loss of 0.043 at 1 kHz.Using the above-mentioned KNLNTS-based powder as the raw material,the 1-3 piezoelectric composites are prepared by the cutting and filling method,and the effect of thickness on the performance of the composites is studied.It is found that the piezoelectric constant and thickness vibration electromechanical coupling factor K t both increase with the increase of thickness,the dielectric loss decreases with the increase of thickness,while the relative permittivity remains basically unchanged.

关 键 词：压电陶瓷 铌酸钾钠 1-3型复合物 厚度 

分 类 号：TN384[电子电信—物理电子学] TB34[一般工业技术—材料科学与工程]