合成方式对(1-x)Ba_(0.998)La_(0.002)TiO_3-xBi_4Ti_3O_(12)陶瓷性能影响的研究  

Effects of Synthesizing Method on the Properties of the (1-x)Ba_(0.998)La_(0.002)TiO_3-xBi_4Ti_3O_(12) Ceramics

作　　者：赵新[1] 蒲永平[1] 陈小龙[1] 陈凯[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《人工晶体学报》2010年第B06期96-99,104,共5页Journal of Synthetic Crystals

基　　金：教育部科学技术研究重点项目(209126);陕西省科技厅工业攻关项目(2010K10-14);陕西省教育厅科研专项基金项目(H2H011);陕西科技大学研究生创新基金

摘　　要：采用固相法制备了Bi4Ti3O12(BIT)与La2O3共掺杂的(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12(0.001≤x≤0.03)系统陶瓷,研究了不同合成工艺(一步合成法:BIT与La2O3直接掺杂到BaTiO3陶瓷中;两步合成法:先将La2O3和BaTiO3预合成Ba0.998La0.002TiO3陶瓷,再将BIT掺杂到Ba0.998La0.002TiO3陶瓷中)对(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12陶瓷显微结构、居里温度Tc及电性能的影响。结果表明:BIT对两种方式合成的(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12陶瓷的晶粒长大均有抑制作用,而随着BIT加入量的增加晶粒又逐渐长大;一步合成法制备的(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12陶瓷存在晶粒异常长大,而两步合成法制备的BLIT陶瓷晶粒较小;一步合成法对(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12陶瓷的居里温度没有影响,而两步合成法制备的(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12陶瓷居里温度提高到约150℃。（1-x） Ba0.998La0.002TiO3-xBi4Ti3O12 （0. 001 ≤x ≤0.03 ） ceramics were prepared by solid-state reaction technology via different prepared processing（ one-step ： （1-x） Ba0.998 La0.002TiO3-xBinTi3O12 were prepared from the powder of BiaWi3O12（BIT） , La2O3 and BaTiO3 ; two-steps： first, Ba0.99sLa0.002TiO3 was made from the powder of La2O3 and BaTiO3, then Ba0.998La0.002TiO3 and BIT were prepared for （1-x） Ba0.99s La0.002TiO3-xBi4Ti3 O12 ceramics. The microstructure, Curie temperature and electrical properties of the ceramics were investigated. The results show that BIT would restrain the grain growth whether onestep processing or two-step processing. However, the grain size increased as the of BIT addition amour increasing. The （1-x）Ba0.998La0.002TiO3-xBi4Ti3 O12 ceramics made by one-step processing contains grain abnormat gromth, but the grain size made by two-step processing is fine. There is nearly no influence on the Curie temperature of （1-x）Ba0.998 La0.002 TiO3-xBi4Ti3012 ceramics which made by one-step processing. However, two-step processing made the Curie temperature raise to about 150 ℃.

关 键 词：钛酸铋 钛酸钡 氧化镧 介电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]