MgAl_2O_4透明陶瓷中电子辐照诱导缺陷退火行为研究  

Behavior of defects in the electron-irradiated transparent MgAl_2O_4 ceramics after annealing

作　　者：何捷[1] 林理彬[1] 王鹏[1] 卢勇[1] 邹萍[2] 王治国[1] 甘荣兵[1] 

机构地区：[1]四川大学物理系,四川成都610064 [2]四川大学分析测试中心,四川成都610064

出　　处：《功能材料》2002年第1期98-100,共3页Journal of Functional Materials

摘　　要：用能量为１．７ＭｅＶ，束流强度０．７μＡ·ｃｍ－２，总注量６．３×１０１６ｃｍ－２的电子辐照镁铝尖晶石透明陶瓷，并对辐照后的样品进行等时退火，利用ＵＶＶＩＳ和ＰＡＴ测试，表明通过电子辐照样品在２３７ｎｍ和３７０ｎｍ处产生吸收带，它们主要是Ｆ心及Ｖ型色心。通过退火可以使Ｆ心及Ｖ型色心吸收峰消除，但Ｆ心的消除温度要高于Ｖ型色心，且其在退火过程中形成Ｆ聚心，Ｆ聚心随Ｆ心聚集增加其峰位将向紫外移动。Transparent MgAl2O4 ceramics was exposed to electrons beam with the energy of 1.7MeV and the flux of 6.3×1016cm-2. The samples have been isochronally annealed after irradiation. The optical spectra and the defects have been measured by UV VIS and PAT. The experiments indicated that two kinds of optical-absorptions at 237nm and 370nm were introduced for electron irradiatied MgAl2O4 ceramics, which were resulted from V-type absorption and F center. All the color centers can be drown by annealing. In the process of annealing, the F center converted into F2, F3, F4 center, and the optical-absorption band at 237nm moved to 210nm.

关 键 词：镁铝尖晶石透明陶瓷 电子辐照 等时退火 F聚心 光学材料 

分 类 号：O571.33[理学—粒子物理与原子核物理]