钛宝石晶体的泡生法生长和闪烁发光性能  

Crystal Growth and Scintillation Luminescence Properties of Ti∶Al2O3 Crystals Grown with Kyropoulos Method

作　　者：王庆国[1] 刘波[1] 罗平[1] 唐慧丽[1] 吴锋[1] 康森 段金柱[3] 王勤峰[3] 徐军[1] WANG Qingguo;LIU Bo;LUO Ping;TANG Huili;WU Feng;KANG Sen;DUAN Jinzhu;WANG Qinfeng;XU Jun(School of Physics and Engineering,Tongji University,Shanghai 200092,China;TDG Yinxia New Material Co.,Ltd.,Yinchuan 750001,China;TDG Holding Co.,Ltd.,Haining 314412,China)

机构地区：[1]同济大学物理科学与工程学院,上海200092 [2]天通银厦新材料有限公司,银川750001 [3]天通控股股份有限公司,海宁314412

出　　处：《人工晶体学报》2021年第4期762-767,共6页Journal of Synthetic Crystals

基　　金：上海蓝宝石单晶工程技术研究中心项目(14DZ2252500)。

摘　　要：采用泡生法生长了115 kg级大尺寸钛宝石(Ti∶Al_(2)O_(3))晶体,晶体外形完整无开裂,制备了口径达ϕ300 mm的高质量大口径钛宝石单晶样品。在X射线和α粒子激发下测试了晶体的闪烁发光性能。结果表明,Ti∶Al_(2)O_(3)晶体的闪烁发光包含近红外和近紫外发光。近红外发光来源于Ti^(3+)特征发射,效率较高,衰减时间慢。近紫外发光来源于Ti局域激子发光和F^(+)心发光,具有较快的衰减时间,其光输出与掺杂导致的自吸收有关。α粒子激发下,光产额达到1130.5 pe/MeV,其中快成分光产额为29.6 pe/MeV。Large-sized Ti∶Al_(2)O_(3) crystals with the weight of 115 kg were grown successfully by Kyropoulos method.The grown crystals have complete shape without any cracking.Large Ti∶Al_(2)O_(3) single crystal sample with diameter of 300 mm was prepared.The scintillation luminescence properties of the grown crystals were tested under the X-ray andαparticle excitation.The results show that the scintillation luminescence of Ti∶Al_(2)O_(3) crystals include near infrared band and near ultraviolet band.The near infrared emission comes from the characteristic emission of Ti^(3+),which has high efficiency and slow decay time.The near ultraviolet emission comes from Ti-localized exciton emission and F^(+)center,which has the fast decay time.The light output is related to the self-absorption caused by Ti-doping.Under the excitation of theαparticles,the light yield reaches up to 1130.5 pe/MeV,and the fast component is 29.6 pe/MeV.

关 键 词：钛宝石 单晶生长 泡生法 闪烁发光性能 

分 类 号：O78[理学—晶体学]