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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

导模法生长α-Al2O3∶C晶体

杨新波1,3， 李红军1, 毕群玉2，3, 程 艳2,3， 苏良碧1, 唐 强4, 徐 军1   

  1. 1.中国科学院 上海硅酸盐研究所， 上海 201800； 2.中国科学院 上海光学精密机械研究所， 上海 201800； 3.中国科学院 研究生院， 北京 100049; 4.中山大学 物理学系， 广州 510275
  • 收稿日期:2008-05-22 修回日期:2008-07-11 出版日期:2009-03-20 网络出版日期:2009-03-20

Growth of α-Al2O3∶C Crystal by Edge-Defined, Film-Fed Growth Technique

YANG Xin-Bo1,3, LI Hong-Jun1, BI Qun-Yu2,3, CHENG Yan2,3, SU Liang-Bi1, TANG Qiang4, XU Jun1   

  1. 1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China; 2.Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; 3 Graduate University of the Chinese Academy of Sciences, Beijing 100039, China; 4.Department of Physics, Zhongshan University, Guangzhou 510275, China
  • Received:2008-05-22 Revised:2008-07-11 Published:2009-03-20 Online:2009-03-20

PDF (PC)

1976

被引次数

2

摘要： 以高纯Al2O3为原料，利用石墨发热体和石墨保温桶为碳源，采用导模法生长了α-Al2O3∶C 晶体，研究了氢气退火后得到的α-Al2O3∶C晶体的热致发光和光致受激发光特性.α-Al2O3∶C晶体在460K具有单一一级动力学热致发光峰，热致发光发射波长位于415nm.α-Al2O3∶C晶体的光致受激发光曲线呈指数衰减，衰减曲线由快衰减和慢衰减两部分组成.α-Al2O3∶C晶体的热致发光和光致受激发光剂量响应曲线具有线性亚线性饱和的特点，其中热致发光剂量响应在5×10-6~0.2Gy范围内呈现良好的线性关系，饱和剂量为10Gy；光致受激发光剂量响应在5×10-6~10Gy范围内呈现良好的线性关系，饱和剂量为30Gy.

关键词: α-Al2O3∶C, 热致发光, 光致受激发光, 导模法

Abstract: α-Al2O3∶C crystal was grown by Edge-Defined, Film-Fed Growth Technique (EFG) in which graphite heating unit and shield acted as the carbon source and high purity Al2O3 was used as the raw material. Thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of as-grown crystal after annealing in H2 were investigated. The crystal shows a single one-order kinetic glow peak at 460K and blue emission band at 415nm. OSL decay curve of α-Al2O3∶C crystal shows exponential characteristic. The decay curve is made up of two components, i.e. the faster component and the slower component. The TL and OSL responses of α-Al2O3∶C crystal show linearsublinearsaturation characteristics. The TL exhibits good linear dose response in the dose range from 5×10-6 to 0.2Gy and saturation is about 10Gy. The OSL exhibits good linear dose response in the dose range from 5×10-6 to 10Gy and saturation is about 30Gy.

Key words: α-Al2O3∶C, thermoluminescence, optically stimulated luminescence, edge-defined, film-fed growth technique

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