BNBMT无铅压电陶瓷的制备及性能研究  

Preparation and Properties of BNBMT Lead-free Piezoelectric Ceramics

作　　者：段星[1] 黄焱球[1] 刘甜甜[1] 

机构地区：[1]中国地质大学材料科学与化学工程学院,湖北武汉430074

出　　处：《佛山陶瓷》2009年第6期1-4,共4页Foshan Ceramics

摘　　要：本文采用新型溶胶-凝胶制粉技术和传统陶瓷生产工艺制备了0.93Bi0.5Na0.5TiO3-0.07Ba1-xMgxTiO3(简称BNBMT100x)体系无铅压电陶瓷,并对BNBMT陶瓷的晶相特征及其介电和压电性能进行了讨论。XRD分析表明,陶瓷样品均形成了单一的钙钛矿结构固溶体;Mg的加入对陶瓷的介电、压电性能有显著影响;陶瓷的铁电-顺电相变峰显著降低、展宽;介电损耗在室温至200℃范围内较平缓。当x=0.04时,机电耦合系数kp和kt最大,分别为16%和19%,压电常数d33值为111pC/N。0.93Bi0.5Na0.5TiO3-0. 07Ba1-xNgxiO3（BNBMTlOOx for short）Lead-free piezoelectric ceramics were fabricated from the powders prepared by a novel sol-gel method. Piezoelectric properties, dielectric properties and crystal structure of the BNBMT ceramics were studied. The 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 the Mg. The ferroelectric-paraelectric phase transition of the ceramics has a significant reduction and broadening, and the dielectric loss shows rather gentleness at room temperature to 200℃. When x=0. 04, the mechanical couple coefficient of the ceramics reaches the maximum value, kp=16%,kt=19%,with the piezoelectric constant d33=111pC/N.

关 键 词：无铅压电陶瓷 微观结构 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]