LiCe掺杂对铋层材料K_(0.5)Bi_(2.5)Nb_2O_9的影响  

The Effect of(Li,Ce) Doping in Aurivillius Phase Material K_(0.5)Bi_(2.5)Nb_2O_9

作　　者：盖志刚[1] 王矜奉[1] 苏文斌[1] 赵明磊[1] 王春明[1] 杜鹃[1] 郑立梅[1] 王春雷[1] 张家良[1] 李吉超[1] 

机构地区：[1]山东大学物理学院晶体材料国家重点实验室,山东济南250100

出　　处：《压电与声光》2008年第4期446-449,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50702030和50572056);教育部高等教育博士点基金资助项目(20070422659)

摘　　要：用传统固相烧结法获得了含A位空位的(KBi)0.5-x(LiCe)x/2 x/2Bi2Nb2O9(其中为A位[KBi]空位)系列铋层陶瓷,研究了A位LiCe掺杂替代对K0.5Bi2.5Nb2O9系列陶瓷性能的影响。LiCe掺杂改性明显提高了K0.5Bi2.5Nb2O9系列陶瓷的压电活性,(KBi)0.44(LiCe)0.03 0.03Bi2Nb2O9陶瓷的压电系数d33、平面机电耦合系数kp和厚度振动机电耦合系数kt分别为31 pC/N、5%和22%。BLSF ceramic samples of （KBi）0.5--x（LiCe）x/2□x/2Bi2Nb2O9 （where □ represents A-site [KBi] vacancies） were prepared using a conventional solid state processing. The effect of LiCe substitution for A-site on the properties of K0.5Bi2.5Nb2O9 （ KBN）-based ceramics was investigated. The piezoelectric activity of K0.5Bi2.5Nb2O9- based ceramics was significantly improved by the modification of lithium and cerium. The piezoelectric coefficient d33, planar electromechanical coupling coefficient kp and thickness electromecanical coupling coefficient kt of （KBi）0.44 （LiCe）0.03 □0.03Bi2Nb2O9 ceramic were found to be 31 pC/N, 5% and 22%.

关 键 词：铋层结构铁电体 平面机电耦合系数 厚度振动机电耦合系数 压电系数 

分 类 号：TM22[一般工业技术—材料科学与工程]