(1-x)(Bi_(1/2)Na_(1/2))_(0.900)Ba_(0.088)Sr_(0.012)TiO_3-x(Bi_(1/2)K_(1/2))TiO_3无铅压电陶瓷的电学和力学性能(英文)  

ELECTRICAL AND MECHANICAL PROPERTIES OF (1-x)(Bi_(1/2)Na_(1/2))_(0.900)Ba_(0.088)Sr_(0.012)TiO_3-x(Bi_(1/2)K_(1/2))TiO_3 LEAD-FREE PIEZOELECTRIC CERAMICS

作　　者：彭春娥[1] 甄玉花[1] 张雅茹 李敬锋[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《硅酸盐学报》2008年第5期602-607,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50325207、50672040);高等学校博士学科点专项科研基金(20060003023);丰田公司–清华大学合作项目

摘　　要：利用常规烧结方法制备出了多种A位离子掺杂的钛酸铋纳[(Bi1/2Na1/2)TiO3,BNT]无铅压电陶瓷。对BNT基陶瓷的电学性能和力学性能进行了研究。在(1-x)(Bi1/2Na1/2)0.900Ba0.088Sr0.012TiO3-x(Bi1/2K1/2)TiO3(x=0-0.14)陶瓷体系中,当x=0.10时,可获得最大压电常数(168 pC/N)。在1 kHz,这种陶瓷的介电常数、介电损耗和平面机电耦合系数分别为1 221,0.036 1和0.228 1。Curie温度随x的增加先增加,当x=0.12时,达到最高值(300℃),随后,当x值进一步增加,Curie温度降低。该种无铅压电陶瓷的Vickers硬度和断裂韧性分别为5.0 GPa和2.0 MPa.m1/2,均高于Pb(Zr,Ti)O3陶瓷。Bismuth sodium titanate(Bi1/2Na1/2)TiO3(BNT) lead-free ceramics containing multiple A-site dopants were synthesized by conventional ceramic processing,and their electrical properties and mechanical properties were investigated to reveal the effects of and 0.228 1,respectively.The Curie temperature first increases with increasing x value and reaches the maximum value of 300 ℃ at the multiple A-site dopants on the BNT-based ceramics.In the case of(1-x)(Bi1/2Na1/2)0.900Ba0.088Sr0.012TiO3-x(Bi1/2K1/2)TiO3(x=0-0...

关 键 词：钛酸铋钠 压电陶瓷 电学性能 力学性能 

分 类 号：TM28[一般工业技术—材料科学与工程]