BiCrO_3掺杂Na_(0.5)K_(0.5)NbO_3压电陶瓷的制备与性能  

Preparation and properties of BiCrO_3 doped Na_(0.5)K_(0.5)NbO_3 lead-free piezoelectric ceramics

作　　者：刘超英[1] 刘心宇[1,2] 江民红[2] 刘久元[1] 马家峰[1] 

机构地区：[1]桂林电子科技大学广西信息材料重点实验室,广西桂林541004 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《电子元件与材料》2010年第3期1-3,共3页Electronic Components And Materials

基　　金：广西教育厅科研资助项目(No200807LX121);广西信息材料重点实验室主任基金资助项目(No桂科能0710908-09-Z);广西信息材料创新人才基金资助项目

摘　　要：采用传统固相合成法制备了BiCrO3掺杂Na0.5K0.5NbO3无铅压电陶瓷。借助XRD、SEM等手段对该陶瓷的显微结构与电性能进行了研究。结果表明,当BiCrO3掺杂量为0.2%～1.0%(摩尔分数),样品均为ABO3型钙钛矿结构。当BiCrO3掺杂量为0.4%(摩尔分数)时,所得陶瓷样品具有最优综合电性能,其压电常数d33、机电耦合系数kp、机械品质因素Qm、斜方–四方相变温度tO-T和居里温度tC分别为138pC/N,0.32,30,175℃和410℃。BiCrO3 doped Na0.5K0.5NbO3 lead-free piezoelectric ceramics were prepared by the traditional solid state synthesis method.The microstructure and electrical properties of prepared ceramics were investigated by XRD,SEM and other techniques.The results show that Na0.5K0.5NbO3 ceramic samples doped with 0.2%～1.0%（mole fraction） BiCrO3 possess a typical ABO3 type perovskite structure.With the doping of 0.4%（mole fraction） BiCrO3,the observed ceramic sample shows the best electrical properties,and its piezoelectric constant d33,electromechanical coupling factor kp,mechanical quality factor Qm,orthorhombic-tetragonal phase transition temperature tO-T and Curie temperature tC reach optimum values of 138pC/N,0.32,30,175℃ and 410℃,respectively.

关 键 词：无铅压电陶瓷 Na0.5K0.5NbO3 BiCrO3 压电性能 钙钛矿 

分 类 号：TM282[一般工业技术—材料科学与工程]