(Na_(0.55)K_(0.45))_(1-x)Li_xNb_(1-x)Sb_xO_3压电陶瓷偏离两相共存区的性能研究  

Structure and electrical properties of (Na_(0.55)K_(0.45))_(1-x)Li_xNb_(1-x)Sb_xO_3 lead-free ceramics with composition deviation from coexistence of the orthorhombic and tetragonal phases

作　　者：黄小磊[1] 肖定全[1] 朱建国[1] 余萍[1] 吴家刚[1] 吴浪[1] 李香[1] 孙勇[1] 吴文娟[1] 张斌[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610064

出　　处：《功能材料》2009年第6期903-905,共3页Journal of Functional Materials

基　　金：国家自然科学基金重大国际合作资助项目(50410179);国家自然科学基金面上项目资助项目(50772068)

摘　　要：使用传统陶瓷烧结工艺制备了(Na0.55K0.45)1-xLixNb1-xSbxO3体系无铅压电陶瓷中偏离两相共存区的0.97(Na0.55K0.45)NbO3-0.03LiSbO3(简记为97KNN-3LS)陶瓷,分析了在不同烧结温度下其结构与电学性能。研究结果表明,当在适当的烧结温度时,该组分陶瓷具有良好的压电与铁电性能,其中,压电常数d33=166pC/N,平面机电耦合系数kp=46.7%,动态电阻R1=63Ω。该体系陶瓷在常温附近具有较高的kp与较低的R1,是一种很有应用前景的无铅压电陶瓷。0. 97 （Na0. 55 K0. 45 ） NbO3-0.03 LiSbO3 （97KNN-3 LS） lead-free piezoelectric ceramics, the composition of which is deviation from the coexistence of the orthorhombic and tetragonal phases of （Na0.55K0.45）1-xLixNb1-xSBxO3system, have been prepared by the conventional mixed oxide method. The microstructure and electrical properties of 97KNN-3LS ceramics were investigated with the influence of sintering temperature. The results of present work indicate that 9？KNN-3LS ceramics with the optimum sintering temperature possess significantly improved piezoelectric properties： piezoelectric constant d33 = 166pC/N, planar electromechanical coupling factors kp=46.7% and motional resistance R1= 63Ω. These results show that the 97KNN-3LS ceramics may be regarded the promising lead-free piezoelectric materials.

关 键 词：无铅压电陶瓷 铁电性能 压电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]