(1–x)BiFeO_3-xBaTiO_3陶瓷的结构与电学性能研究  

Structural,electric properties of multiferroic(1–x)BiFeO_3-xBaTiO_3 ceramics

作　　者：代海洋[1] 陈镇平[1] 薛人中[1] 李涛[1] 许继峰[1] 

机构地区：[1]郑州轻工业学院技术物理系,河南郑州450002

出　　处：《电子元件与材料》2013年第3期22-25,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.11175159);郑州轻工业学院博士科研基金资助项目(No.2010BSJJ030)

摘　　要：采用固相反应法制备了(1–x)BiFeO3-xBaTiO3多晶陶瓷样品,研究了BaTiO3添加对BiFeO3陶瓷结构、电学性能的影响。结果表明:当x由0增加到0.4时,样品的相结构由三方钙钛矿结构逐渐转变为立方结构,杂相有效消除;漏电流密度从1.1×10–5A.cm–2下降至1.1×10–7A.cm–2,相对介电常数提高了2.6倍,剩余极化强度增加了近20倍。（1-x）BiFeO3-xBaTiO3（x=0-0.40） ceramics were synthesized by solid state reaction method. The effects of BaTiO3 addition on the microstructure and electrical properties of the BiFeO3 ceramics were investigated. The results show that when x increases from 0 to 0.40, the structure of BiFeO3 is changed from rhombohedral to cubic symmetry and the impurity phases are eliminated, while the leakage current density is decreased from 1.1×10^-5A·cm^-2 to1.1×10^-7A·cm^-2. The dielectric constant and remnant polarization for the x=0.40 sample are about 2.6 and 20 times higher than that for unsubstituted BiFeO3, respectively.

关 键 词：BiFeO3陶瓷 BaTiO3添加量 铁电性能 漏电流 电滞回线 相结构 

分 类 号：O469[理学—凝聚态物理]