(1-x)Ba_(0.998)La_(0.002)TiO_3+xBi_4Ti_3O_(12)陶瓷电性能的研究  

Research on Electrical Properties of the(1-x)Ba_(0.998)La_(0.002)TiO_3+xBi_4Ti_3O_(12) Ceramics

作　　者：赵新[1,2] 蒲永平[1,2] 王瑾菲 陈小龙[1] 杨公安[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021 [2]浙江温州轻工研究院,温州325003

出　　处：《人工晶体学报》2009年第S1期89-91,共3页Journal of Synthetic Crystals

基　　金：教育部科学技术研究重点项目(No.209126);浙江温州科技计划项目(H20080042);陕西省教育厅科研专项基金(No.08JK222);陕西科技大学研究生创新基金

摘　　要：采用固相法制备了(1-x)Ba0.998La0.002TiO3+xBi4Ti3O12(0≤x≤0.03)陶瓷,研究了Bi4Ti3O12掺杂量以及烧结气氛对Ba0.998La0.002TiO3陶瓷显微结构、居里温度Tc及介电性能的影响。结果表明:Bi4Ti3O12在Ba0.998La0.002TiO3陶瓷中的掺杂抑制了陶瓷晶粒的生长,使居里温度提高到约150℃。在空气中烧结的陶瓷的介电常数随Bi4Ti3O12掺杂量的增加先减小后增大,当Bi4Ti3O12掺杂量为1.5 mol%时,陶瓷的介电常数最小(还原再氧化陶瓷的介电常数为6.0×103,空气中烧成的陶瓷的介电常数为9.0×102)。(1-x)Ba0.998La0.002TiO3+xBi4Ti3O12(0.001≤x≤0.03) ceramics were prepared by solid-state reaction technology.The ceramic samples were sintered in oxygen atmosphere(air) and reducing atmosphere(nitrogen).The microstructure and properties of these ceramics were characterized by SEM,R-T testing apparatus and Aligent 4284A.Microstructure,dielectric properties and Curie temperature(Tc) of the samples were influenced by Bi4Ti3O12 doping concentration and sintering atmosphere.The results showed that the microstructure of Bi4Ti3O12-doped BaTiO3 ceramics were changed and the Curie temperature of the ceramics increased.As the Bi4Ti3O12-doping concentration increasing,the dielectric constant of the samples sintered in the air showed decreased firstly and then increased.

关 键 词：钛酸铋 钛酸镧钡 显微结构 居里温度 介电性能 

分 类 号：TQ174.13[化学工程—陶瓷工业]