复合法制备的(K_(0.48)Na_(0.52))_(1-x)(LiSb)_xNb_(1-x)O_3无铅压电陶瓷性能研究  

Properties of (K_(0.48)Na_(0.52))_(1-x)(LiSb)_xNb_(1-x)O_3 Lead-free Piezoelectric Ceramics Prepared by Composite Method

作　　者：刘燕燕[1] 臧国忠[1] 郭晴[1] 王燕[1] 

机构地区：[1]聊城大学材料科学与工程学院,山东聊城252059

出　　处：《聊城大学学报（自然科学版）》2011年第2期50-52,56,共4页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50802038);聊城大学大学生科技文华创新项目(SRT10014CL2)

摘　　要：采用传统的固相反应法和普通的烧结工艺,分别制备了(K0.48Na0.52)1-x(LiSb)xNb1-xO3(x=0.055,0.060,0.065)和x=0.055,x=0.065按摩尔比1:1复合的无铅压电陶瓷样品(55-65),并对样品的压电、介电等性能进行了测试研究.实验结果表明:55-65不等同于x=0.060的组分,其压电性能远低于x=0.060的样品,进一步研究表明,相同烧结温度下,55-65样品的损耗较高,晶粒难以生长,相对较小,较小的晶粒可能在样品形变时产生的应力较大,这可能是55-65样品压电性能较低的原因.Lead-free Piezoelectric ceramics （K0.48Na0.52）l-χ（LiSb）xNbl-xO3 （x=0. 055,0. 060,0. 065）, the composition compounded with x=0.055, x=0. 065 in mol ratio 1：1 （55-65） are fabricated by con- ventional solid-state sintering method, and the dielectric and piezoelectric characteristics are investiga- ted. It is found that the piezoelectric properties of 55-65 is much lower than that of the sample with x= 0. 060. Further investigations show that the sample 55-65 has relatively high dielectric loss and small grains. The smaller grains may lead to stronger stress with the same strain and this may be the reason for the sample 55-65 exhibiting low piezoelectric activities.

关 键 词：无铅压电陶瓷 KNN 温度稳定性 压电常数 

分 类 号：TM22[一般工业技术—材料科学与工程]