Bi(Zn_(0.5)Ti_(0.5))O_3对Bi_(0.5)Na_(0.5)TiO_3基陶瓷相结构及弛豫性的影响  

Influence of Bi(Zn_(0. 5)Ti_(0. 5))O_3 on the Phase Structure and Relaxation Behavior of Bi_(0. 5)Na_(0. 5)TiO_3-based Ceramics

作　　者：段成辉[1] 朱满康[1] 宋雪梅[1] 刘立英[2] 侯育冬[1] 

机构地区：[1]北京工业大学材料学院,北京100124 [2]北京工业大学应用数理学院,北京100124

出　　处：《人工晶体学报》2014年第4期806-810,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51172006);北京市自然科学基金(2132007);高等学校博士点学科专项科研基金(20131103110031)

摘　　要：采用固相反应合成法制备了(1-x)(0.96 Bi0.5Na0.5TiO3-0.04 BaTiO3)-xBi(Zn0.5Ti0.5)O3陶瓷(x≤0.10)。通过X射线衍射,介电温度谱等对该体系陶瓷的相结构及弛豫特性进行了研究。结果发现,该陶瓷在Bi(Zn0.5Ti0.5)O3加入量低于0.05时呈现纯钙钛矿结构。此外,随着Bi(Zn0.5Ti0.5)O3加入量的增加,其相结构由三方-四方共存向赝立方结构转变;同时,陶瓷的弥散因子上升,偶极子取向冻结活化能下降,表明BZT的加入明显地增加了0.96Bi0.5Na0.5TiO3-0.04 BaTiO3陶瓷的弛豫性。（1-x）（0. 96 Bi0. 5Na0. 5TiO3-0. 04BaTiO3）-xBi（Zn0. 5Ti0. 5） O3ceramics were synthesized using conventional solid oxide reaction routes. The phase structure and relaxor characteristics of the ceramics were characterized by X-ray diffraction and temperature-dependence dielectric response. The results show that the perovskite structure keeps stable for Bi（Zn0. 5Ti0. 5） O3addition x≤0. 05. Besides,with Bi（Zn0. 5 Ti0. 5） O3addition increasing, the phase structure transformed from the rhombohedral- tetragonal coexistence to pseudo-cubic phase,and the diffusive factor increased while the activation energy for dipole freezing decreased. These indicate that Bi（Zn0. 5Ti0. 5） O3addition significantly enhance the relaxor be-haviour of 0. 96Bi0. 5Na0. 5TiO3-0. 04BaTiO3ferroelectric ceramics.

关 键 词：BI0 5Na0 5TiO3 Bi(Zn0 5Ti0 5)O3 铁电体 相结构 弛豫性 

分 类 号：TM282[一般工业技术—材料科学与工程]