镝掺杂锆钛酸铅镧透明陶瓷的结构和电光性能  

Structure and Electro-Optical Property of the Dy^(3+) Doped Lanthanum Zirconate-Titanate Ceramics

作　　者：何夕云[1] 张勇[2] 郑鑫森[1] 仇萍荪[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050 [2]景德镇陶瓷学院,江西景德镇333001

出　　处：《光学学报》2009年第6期1601-1604,共4页Acta Optica Sinica

基　　金：上海市自然科学基金(06ZR14095)资助课题

摘　　要：针对锆钛酸铅镧(PLZT)电光陶瓷在光调制器应用中存在工作电压偏高、场致滞后明显等不足,以镧系镝(Dy)元素对锆钛酸铅镧(Pb0.88 La0.12)(Zr0.4 Ti0.6)0.96 O3 [PLZT(12/40/60)]线性电光材料进行掺杂改性。采用热压技术研制镝掺杂锆钛酸铅镧[Pb0.088I (La1-xDyx)0.12](Zr0.40 Ti0.60)0.96 O3](PLDZT)(x-0.1～0.5)透明电光陶瓷。系统考察了PLDZT透明陶瓷的光学性能和电光特性及其与材料结构的相关性。研究表明,Dy掺杂导致材料晶格畸变,微量Dy掺杂有效提高了PLZT(12/40/60)透明陶瓷的光学透过率,并且使典型的线性电光材料呈现二次电光效应特征,二次电光系数R约为5.59×10-16 m2/V2;同时掺杂改性的PLDZT(x=0.1)透明陶瓷的驱动电压较未改性PLZT材料明显降低。Polycrystalline dysprosium （Dy） doped lanthanum zirconate-titanate （PLZT） ceramics with compositional formula [Pb0.88 （La1-x Dyx ）0.12 ] （Zr0.40 Ti0.60 ）0.96 O3 ] （PLDZT） were prepared by hot-pressed solid-state ceramic method. The influence of Dy^3＋ substitution on phase structure, microstructure, optical property and electro-optical property of the materials was investigated and analyzed. When the doping amount x was 0. 1, the optical transmittance of the PLDZT sample reached the maximum value, and the electro-optical effect of the sample transformed from linear effect to quadratic effect. A high quadratic electro-optical coefficient of 5.59 × 10^-16 m^2/V^2 was examined. To obtain a same variation of di-refractive index An, the applied voltage of the PLDZT （x = 0. 1 ） sample was decreased obviously.

关 键 词：光学材料 电光陶瓷 热压技术 锆钛酸铅镧 电光特性 

分 类 号：O472[理学—半导体物理]