Ca掺杂(Bi_(0.5)Na_(0.5))TiO_3-BaTiO_3压电陶瓷结构与性能  

Structure and properties of Ca-doped Bi_(0.5)Na_(0.5)TiO_3-BaTiO_3 piezoelectric ceramics

作　　者：刘甜甜[1] 黄焱球[1] 段星[1] 晏秋实[1] 张蓓[1] 

机构地区：[1]中国地质大学(武汉)材料科学与化学工程学院,湖北武汉430074

出　　处：《电子元件与材料》2009年第2期16-19,共4页Electronic Components And Materials

摘　　要：采用传统电子陶瓷工艺制备了(Bi0.5Na0.5)0.93(Ba1-xCax)0.07TiO3(x=0.02,0.04,0.06,0.08或0.10)陶瓷,研究了Ca掺杂量对陶瓷的结构、介电、压电性能的影响。结果表明,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Ca掺杂量的影响显著。所有陶瓷样品均表现出弥散相变特征。x=0.04时,室温εr达到最大值1451.7,且tanδ较小,为0.042;当x=0.06时,d33和kp达到最大,分别为140.5pC/N和19.7%。The （Bi0.5Na0.5）0.93（Ba1-xCax）0.07TiO3 （x = 0.02, 0.04, 0.06, 0.08 or 0.10） lead-free piezoelectric ceramics were prepared by the conventional electroceramic technology. The effects of Ca-doped amount on the phase structure, dielectric and piezoelectric properties of ceramics were investigated. The results show that all the ceramics are single-phase solid solutions with perovskite structure. The dielectric and piezoelectric properties of the ceramics are affected obviously by the Ca-doped amount. All the ceramics posess the characteristic of diffusion phase transition （DPT）. The maximum value of the permittivity （ ετ of 1 451.7 ） with a lower dielectric loss （tanδ of 0.042） for the ceramics can be obtained as x is 0.04 at room temperature. The piezoelectric constant （d33） and the electromechanical coupling factor （kp） reaches the maximum value of 140.5 pC/N and 19.7% respectively as x is 0.06.

关 键 词：无机非金属材料 Bi0.5Na0.5TiO3-BaTiO3 无铅压电陶瓷 弥散相变 机电耦合系数 

分 类 号：TM282[一般工业技术—材料科学与工程]