(1-x)K_(0.5)Na_(0.5)NbO_3-xLiBiO_3无铅压电陶瓷的结构与压电性能(英文)  

Structure and piezoelectric properties of (1-x)K_(0.5)Na_(0.5)NbO_3-xLiBiO_3 lead-free piezoelectric ceramics

作　　者：江民红[1,2,3] 邓满姣[1] 杨祖培[2] 付振晓 

机构地区：[1]桂林电子科技大学广西信息材料重点实验室,桂林541004 [2]陕西师范大学陕西省大分子科学重点实验室,西安710062 [3]广东风华高新科技股份有限公司研究院,肇庆526020

出　　处：《中国有色金属学会会刊：英文版》2012年第S1期133-137,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project (51102056) supported by National Natural Science Foundation of China;Projects (2011GXNSFB018008, 2012GXNSFGA060002) supported by Guangxi Natural Science Foundation;Project (2011no.40) supported by Program for Excellent Talents in Guangxi Higher Education Institutions;Project (201012MS085) supported by Research Program of Guangxi Education Department;Project (2012M511975) supported by China Postdoctoral Science Foundation Funded

摘　　要：采用传统固相反应制备了(1-x)(K0.5Na0.5)NbO3–xLiBiO3[(1–x)KNN–xLB](x=0,0.0005,0.001,0.002,0.004,0.006,0.008,0.010)压电陶瓷,并分析研究了其微结构及电性能。结果表明,LB 掺杂的 KNN 陶瓷主要形成了钙钛矿结构,没有检测到第二相的存在,并且陶瓷的相结构出现直接由正交相过渡到立方相的"反常"转变;随着LB 掺杂量的增加,晶粒尺寸逐渐细化,陶瓷的压电常数d33、平面机电耦合系数kp先略有增加后显著下降,且分别在x=0.002和 x=0.001时达到最大值,分别为115pC/N和0.2701;陶瓷的介电常数εr随x增大先增加后略有降低,当 x=0.006时获得最大值,为871.8。采用传统固相反应制备了(1-x)(K0.5Na0.5)NbO3–xLiBiO3[(1–x)KNN–xLB](x=0,0.0005,0.001,0.002,0.004,0.006,0.008,0.010)压电陶瓷,并分析研究了其微结构及电性能。结果表明,LB 掺杂的 KNN 陶瓷主要形成了钙钛矿结构,没有检测到第二相的存在,并且陶瓷的相结构出现直接由正交相过渡到立方相的"反常"转变;随着LB 掺杂量的增加,晶粒尺寸逐渐细化,陶瓷的压电常数d33、平面机电耦合系数kp先略有增加后显著下降,且分别在x=0.002和 x=0.001时达到最大值,分别为115pC/N和0.2701;陶瓷的介电常数εr随x增大先增加后略有降低,当 x=0.006时获得最大值,为871.8。

关 键 词：铋酸锂 铌酸钾钠 无铅压电陶瓷 压电性能 介电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]