Ca掺杂对Ba_(0.8)Sr_(0.2)TiO_3本征热释电性能的影响  

Influence of Ca-doping on Intrinsic Pyroelectric Properties for Ba_(0.8)Sr_(0.2)TiO_3

作　　者：唐畅[1] 杜层虎[1] 陈潇洋[1] 张小山[1] 李军[1] 余萍[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065

出　　处：《广州化工》2011年第11期4-6,共3页GuangZhou Chemical Industry

基　　金：国家自然科学基金委员会(No.u0837605):热释电薄膜型非制冷红外焦平面阵列若干关键技术研究

摘　　要：以尿素(Urea)为添加剂,用溶胶-凝胶工艺在较低温(550℃)合成了钛酸锶钡粉末,在1 300℃烧结成陶瓷。研究了Ca掺杂量对陶瓷结构、介电、铁电以及本征热释电性能的影响。研究显示:陶瓷样品均形成了单一的钙钛矿结构固溶体。陶瓷的本征热释电性能受Ca掺杂量影响显著。当Ca掺杂量为2 at%时,陶瓷在居里点附近的本征热释电系数达670 nC.cm-2.k-1。Barium strontium titanate powder was synthesized at the lower temperature of 550 ℃ by sol -gel method, in which Urea[ CO （NH2）2 ] played an important role, and the ceramics were sintered at 1 300℃. The influence of Cadoping on structure, dielectric, ferroelectric and intrinsic pyroelectrie properties for Ba0.8Sr0.2TiO3 were mainly investiga- ted. Results suggested that all the ceramics were single -phase solid solutions with perovskite structure. The intrinsic py- roelectric properties of the ceramics were obviously affected by the Ca - doped amount. The intrinsic pyroelectric coeffi- cient of ceramics reached 670 nC · cm-2 . k^-1 around curie temperature when x =0.02.

关 键 词：钛酸锶钡 Ca掺杂 热释电 溶胶-凝胶 

分 类 号：TN215[电子电信—物理电子学]