准同型相界钛酸铋钠钡晶体的制备及光学性能  

Growth and Optical Properties of Lead-Free Barium Bismuth Sodium Titanate Crystals Near Morphotropic Phase Boundary

作　　者：赫崇君 邓晨光 朱星蓉 李自强 高慧芳 路元刚 李千 HE Chongjun;DENG Chenguang;ZHU Xingrong;LI Ziqiang;GAO Huifang;LU Yuangang;LI Qian(Key Laboratory of Space Photoelectric Detection and Perception in Ministry of Industry and Information Technology,College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;Jiangsu Aidi Electromechanical Equipment Industry Co.,Ltd.,Nanjing 211101,China;The 55th Research Institute of CETC,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航天学院空间光电探测与感知工业和信息化部重点实验室,南京211106 [2]清华大学材料学院新型陶瓷与精细工艺国家重点实验室,北京100084 [3]江苏省埃迪机电设备实业有限责任公司,南京211101 [4]中国电子科技集团第55研究所,南京210016

出　　处：《应用技术学报》2022年第4期299-304,共6页Journal of Technology

基　　金：国家自然科学基金(62175105,61875086,61675095);中央高校基本科研业务费项目(NJ2022025,56XBC22047);南京航空航天大学开放课题项目(NJ2020021-2);新型陶瓷与精细工艺国家重点实验室项目(KF202205)资助。

摘　　要：无铅材料(1-x)(Na_(0.5)Bi_(0.5))TiO_(3)-xBaTiO_(3)(NBT-xBT)具有准同型相界结构,采用顶部籽晶助熔剂法生长出不同组分NBT-xBT单晶,研究其准同型相界结构附近的单晶的组分、取向和光学性能之间的关系。[001]取向极化的四方相NBT-xBT单晶透光率达到70%。晶体的透光率决定于极化后的电畴组态。测得室温下[001]取向极化晶体的折射率,拟合出折射率色散方程,在紫外及可见光谱区域,折射率随波长的增大迅速地减小。此研究有助于环保型光学器件的研制。Lead-free materials(1-x)(Na_(0.5)Bi_(0.5))TiO_(3-x)BaTiO_(3)(NBT-xBT)have morphotropic phase boundary structure.Here the NBT-xBT single crystals with different compositions were fabricated by optimized top-seeded solution growth method.Relationship between the composition,orientation and optical properties of the single crystals near morphotropic phase boundary structure was studied.Transmittance of[001]-poled tetragonal NBT-xBT single crystal reaches 70%.The transmittance of crystals depends on the domain configuration after poled.Refractive indices of the crystals poled along[001]direction were measured at room temperature,and dispersion equations were fitted.Refractive index increases rapidly as the wavelength decreases.These studies are helpful to the development of environmentally friendly optical devices.

关 键 词：无铅材料 准同型相界 晶体生长 光学性能 透射光谱 

分 类 号：O734[理学—晶体学]