二氧化锡不同掺杂方式对钛酸钡介电性能的影响  

INFLUENCE OF SnO_2 AND SnO_2-BaO DOPING ON THE DIELECTRIC PROPERTIES OF BARIUM TITANATE

作　　者：沈振江[1] 陈燕[2] 江向平[2] 陈万平[3] 邴丽娜[1] 

机构地区：[1]海南师范大学物理与电子工程学院,海口571158 [2]景德镇陶瓷学院材料科学与工程学院,景德镇333000 [3]武汉大学物理科学与技术学院,武汉430072

出　　处：《中国陶瓷》2012年第1期28-31,共4页China Ceramics

基　　金：海南省自然科学基金项目(No.511115);国家自然科学基金项目(No.50772077);海南师范大学青年教师启动基金(No.QN1127)

摘　　要：研究了二氧化锡不同掺杂方式对钛酸钡介电性能的影响。采用固相法制备出掺杂比例为2mol%SnO2&BaO、2mol%SnO2和4mol%SnO2三组不同方式SnO2掺杂钛酸钡样品。结果表明,两种掺杂方式对钛酸钡的作用效果截然不同,SnO2-BaO共掺杂会以BaSnO3的形式固溶入钛酸钡晶格,从而增大其介电常数,减小居里温度,同时介电损耗不会增大;SnO2单独掺杂则会引入Sn4+杂质离子,造成钛酸钡介电常数的减小以及介电损耗的增大,导致介电性能的劣化。Influence of SnO2 and SnO2-BaO doping on the dielectric properties ot barium titanate was studied. A series of barium titanate doped by 2mo1% SnO2 ＆ BaO, 2mo1% SnO2 and 4mo1% SnO2 were synthesized via solid state reaction and characterized. Results showed that sample doped with SnO2-BaO has higher relative permittivity, low Curie temperature and unchanged dielectric loss. In this condition, BaSnO3 which formed from SnO2-BaO could dissolve into the perovskite structure of BaTiO3. On the other hand, Sn4＋ could act as impurity ions when SnO2 was doped solely. Consequently, the relative permittivity of BaTiO3 was decreased with dielectric loss increased.

关 键 词：钛酸钡 二氧化锡 掺杂方式 介电性能 

分 类 号：TQ139.1[化学工程—无机化工]