Sr掺杂BNT-BT压电陶瓷结构与性能研究  

Structure and Properties Research of Sr-doped BNT-BT Piezoelectric Ceramic

作　　者：周如东[1] 刘甜甜[2] 刘萌萌[3] 段星[2] 

机构地区：[1]西北工业大学机械与电子信息学院,西安710072 [2]中国地质大学(武汉)材料科学与化学工程学院,武汉430074 [3]华中师范大学化学学院,武汉430074

出　　处：《江苏陶瓷》2009年第2期8-11,共4页Jiangsu Ceramics

摘　　要：采用传统的电子陶瓷制备工艺制备了一系列0.93Bi0.5Na0.5TiO3-0.07(Ba1-xSrx)TiO3(简写为BNBST100x;x=0.02,0.04,0.06,0.08,0.10)陶瓷,研究了陶瓷的结构、介电、压电性能变化特征。XRD分析表明,陶瓷样品均形成了单一的钙钛矿结构固溶体。陶瓷的介电、压电性能受Sr含量的影响显著。所有陶瓷样品表现出弥散相变特征。BNBST陶瓷的压电常数随着Sr含量的增加表现出先增大后减少的趋势。同时,当Sr含量为4mol%时,压电常数(d33)达到最大,分别为139.8pC/N。（Bi0.5Na0.5）0.93（Ba1-xSrx）0.07TiO3 （abbreviated to BNBST100x,x=0.02, 0.04, 0.06, 0.08, 0.10） lead-free piezoelectric ceramics were prepared by the conventional ceramic technique. Crystal structure, dielectric and piezoelectric properties of the ceramics were investigated. X-ray diffraction （XRD） analysis showed that all the ceramics formed single-phase solid solutions with perovskite structure. The dielectric and piezoelectric properties of the ceramics were affected obviously by the content of Sr. The ceramics showed the characteristics of diffusion phase transition. The piezoelectric constant, d33, of the BNBST ceramics were enhanced with the increase of Sr content and then tended to decrease. The maximum value of d33 was 139.8 pC/N when the adding amount of Sr were 0.04 mol.

关 键 词：无机非金属材料 (Bi0.5Na0.5)0.93(Ba1-xSrx)0.07TiO3 无铅压电陶瓷 介电性能 压电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]