摘要
在钛酸锶钡(BSTO)与质量分数为55%的MgO混合的基础上,进行了Al2O3掺杂的系统研究.随Al2O3掺入量的增加,BSTO/MgO材料的介电常数减小明显,损耗先减少后增多,调谐性先增大后减小,但过量的Al2O3掺杂使得材料的调谐性降低.当Al2O3掺杂量为mol(Al2O3)=0.5%时,介电损耗达到最小,为2.0×10-3(10KHz),介电常数调谐性达14.1%(4kV/mm).利用电介质理论分析了Al2O3对BST/MgO材料介电性质的改性机理.
Based on w （MgO） = 55 % magnesia mixed with Ba0.55 Sr0.45TiO3 （BSTO） , the influence of Al2O3 dopant on the dielectric properties of BSTO/MgO was investigated. With the increase of the quality of Al2O3 dopant , the dielectric constant of BSTO/MgO material reduced , the loss tangents decreased first and then in- creased,and tunability first increased then decreased , but excess quantity of Al2O3 would lower tunability. When the quantity of Al2O3 was mol （ A1203 ） = 0.5% , the dielectric loss of BST/MgO material achieved minimum , which was equal to 2.0 × 10-3 （10KHz） , and the dielectric constant tunability 14.1% （4kV/ mm） could be obtained. By virtue of the theory of dielectric , the mechanism on the influence of Al2O3 dopant on the dielectric properties of BST/MgO was analysed.
出处
《济宁学院学报》
2012年第3期35-38,共4页
Journal of Jining University
基金
济宁学院科研基金(2010KJLX04)
关键词
铁电材料
AL2O3
钛酸锶钡
介电性能
调谐性
ferroelectric material
Al2O3
barium strontium titanate
dielectric properties
tunability
作者简介
王宇光（1979-），男，山东济宁人，济宁学院化学与化工系讲师，研究方向：功能材料．
