A位LiCe复合取代改性对Na_(0.5)Bi_(2.5)Nb_2O_9陶瓷性能的影响  

The effect of a position LiCe co-substituted on the properties of Na_(0.5)Bi_(2.5)Nb_2O_9 ceramics

作　　者：冯元元[1] 盖志刚[1] 茹扎.阿巴合 赵明磊[1] 

机构地区：[1]山东大学物理学院,济南250100

出　　处：《功能材料》2014年第2期25-29,34,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51002087;51172129;51002097;51102153);教育部博士点基金资助项目(20090131120014);中国博士后科学基金资助项目(20100471509);山东省自然科学基金资助项目(ZR2013EMM018;ZR2013EMM014);山东省博士后基金资助项目(201003082)

摘　　要：用固相反应法制备了[(NaBi)1-x(LiCe)x]0.5Bi2Nb2O9(x=0.00,0.04,0.06和0.08)高温铋层压电陶瓷材料,分析了LiCe对Na0.5Bi2.5Nb2O9压电陶瓷的影响。LiCe掺杂促进了样品晶粒生长,引起样品晶格畸变,这极大地提高了该系列陶瓷样品的压电活性。LiCe掺杂还提高了掺杂样品压电、介电性能的温度稳定性。当x=0.06时,该系列陶瓷的压电常数提高到24pC/N,是纯Na0.5Bi2.5Nb2O9的2倍多,平面机电耦合系数为12%,厚度机电耦合系数为25%,加上高的居里温度,低的介电损耗(1kHz只有0.26%)和稳定的压电特性,表明LiCe改性使Na0.5Bi2.5Nb2O9高温铋层压电陶瓷具有很好的高温应用前景。In this paper,high temperature bismuth layer-structured piezoelectric ceramics [（NaBi ）1-x （LiCe）x]0.5Bi2Nb2O9（x=0.00,0.04,0.06,0.08）was prepared by the solid-state reaction,and the effect of （LiCe）doping on the properties of Na0.5 Bi2.5 Nb2 O9-based ceramics was investigated.The （LiCe）modification accelerates the growth of grains,and causes the lattice distortion which greatly improves the piezoelectric activi-ty of the samples.the temperature stability of the piezoelectric and dielectric properties of Na0.5 Bi2.5 Nb2 O9-based ceramics was also improved by the （LiCe）modification.The d33 of x=0.06 was found to be 24 pC/N, the highest value among the Na0.5 Bi2.5 Nb2 O9-based ceramics and more than 2 times as much as the d33 values of the pure Na0.5 Bi2.5 Nb2 O9 ceramics. The planar coupling factor kp , thickness coupling factor kt of Na0.5Bi2.5Nb2O9 ceramic were found to be 12%,25%,respectively,together with the high Tc,low dielectric loss（only 0.26% at 1 kHz）and stable piezoelectric properties,demonstrating that the （LiCe）modified Na0.5 Bi2.5 Nb2 O9-based material a wonderful candidate for high temperature applications.

关 键 词：铋层结构铁电体 压电陶瓷 无铅 高温应用 

分 类 号：TM22[一般工业技术—材料科学与工程]