（1-x）BiScO3-xPbTiO3铁电陶瓷的结构稳定性和电学性能研究  

Investigation of the structural stability and electrical properties of the （1-x）BiScO3-xPbTiO3 ferroelectric ceramics

作　　者：陈异[1] 蓝德均[1] 陈强[1] 肖定全[1] 朱建国[1] 

机构地区：[1]四川大学材料科学与工程学院,成都610064

出　　处：《高技术通讯》2006年第10期1043-1046,共4页Chinese High Technology Letters

基　　金：国家自然科学基金（60471044）和教育部博士点基金（20020610014）资助项目

摘　　要：采用传统固相法制备了（1-x）BiScO3-xPbTiO3（BSPT）（x=0.58～0.66）铁电陶瓷.经XRD分析发现,BSPT体系三方相和四方相的准同型相界（MPB）在x=0.62附近.在准同型相界附近x=0.62处BSPT陶瓷的压电常数d33和平面机电耦合系数kp具有极大值,但机械品质因素Qm却最小.对BSPT体系及其它钙钛矿型ABO3化合物的结构稳定性进行了讨论,发现容差因子t和离子键百分比p可作为判定钙钛矿结构形成难易程度的基本参数,容差因子t越接近1且离子键百分比p越大的化合物,越容易合成稳定的钙钛矿结构.The （ 1-x ） BiScO3-xPbTiO3 （BSPT） （ x = 0.58 - 0.66） ferroelectric ceramics were prepared by using traditional solid state process. X-ray diffraction analysis revealed that BSPT had a pemvskite structure, in which the morphotmpic phase boundary （MPB） separating the rhombohedral and tetragonal phase exited near x = 0.62. The BSPT ceramics for x = 0.62 showed the enhancement in planar electromechanical coupling factor kp and piezoelectric constant d33, however the lowest mechanical quality factor Qm. The structural stability of the BSPT system and other pemvskite-type ABO3 compounds was discussed. It was found that the tolerance factor t and the amount of ionic bonding p are two basic parameters to effectively affect the stability of the pemvskite structure, and the ABO3 compounds, which have a tolerance factor t 1 and a high amount of ionic bonding p, should be extremely stable pemvskite structures.

关 键 词：BSPT 铁电陶瓷 钙钛矿结构 压电性能 

分 类 号：TQ174.756[化学工程—陶瓷工业]