CuO-Li_2CO_3共掺杂低温烧结Ba_(0.60)Sr_(0.40)TiO_3陶瓷的介电性能  

Dielectric properties of low-temperature sintered Ba_(0.60)Sr_(0.40)TiO_3 ceramics co-doped with CuO-Li_2CO_3

作　　者：荆慧霞[1] 王亚娟[1] 张瑜[1] 杨敬娜[1] 吴怡[1] 刘成[1] 刘鹏[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2011年第3期37-40,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(5087207850772065)

摘　　要：采用传统固相反应法,在低温下制备了Ba0.60Sr0.40TiO3陶瓷.研究了CuO和Li2CO3共掺杂对Ba0.60Sr0.40TiO3陶瓷烧结行为、相结构、显微组织和介电性能的影响.结果表明:采用0.2%CuO和2.0%Li2CO3共掺杂,能有效将Ba0.6Sr0.4TiO3陶瓷烧结温度从1 350℃降至925℃,且低温烧结的样品具有良好的介电性能:rε=2 725,tanδ=0.004 4(10 kHz,20℃),可调性为32.2%(10 kHz,2 kV/mm).Ba0.60Sr0.40TiO3（BST） ceramic is prepared by the conventional solid state-sintering process at low temperature.The sintering behaviors,phase components,microstructures and the dielectric properties of BST ceramics co-doped with CuO and Li2CO3 is investigated.It indicated that the combination of 0.2% CuO and 2.0% Li2CO3 additions is effective in reducing the sintering temperature of Ba0.60Sr0.40TiO3 ceramics from 1 350℃ down to 925℃ and the sample sintered at low temperature displayed excellent comprehensive dielectric properties： εr=2 725,tan δ=0.004 4（measured at 10 kHz and 20℃）,and a tunability of 32.2%（at 10 kHz under a dc electric field of 2 kV/mm）.

关 键 词：低温烧结 介电性能 相结构 

分 类 号：O469[理学—凝聚态物理] TB333[理学—电子物理学]