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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

温梯法蓝宝石(Al2O3)晶体的脱碳去色退火研究

徐军1; 周国清1; 邓佩珍1; 司继良1; 钱小波1; 周永宗1; 王银珍1; 周圣明1; 朱人元2   

  1. 1. 中国科学院上海光学精密机械研究所, 上海 201800; 2. 美国加州理工学院, 加州 CA91125
  • 收稿日期:2004-09-20 修回日期:2004-10-25 出版日期:2005-09-20 网络出版日期:2005-09-20

Decolorisation and Decarbonisation Study on Sapphire Grown by TGT

XU Jun1; ZHOU Guo-Qing1; DENG Pei-Zhen1; SI Ji-Liang1; QIAN Xiao-Bo1; ZHOU Yong-Zhong1; WANG Yin-Zhen1; ZHOU Sheng-Ming1; ZHU Ren-Yuan 2   

  1. 1. Shanghai Institute of Optics and Fine Mechanics; Chinese Academy of Sciences; Shanghai 201800, China; 2.California Institute of Technology; Pasadena; CA91125, USA
  • Received:2004-09-20 Revised:2004-10-25 Published:2005-09-20 Online:2005-09-20

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摘要： 温度梯度法(TGT)生长的Al2O3晶体因石墨发热体在高温时的挥发和原料中过渡性金属离子的存在,晶体在不同部位呈现不同颜色,一般上部为浅红色,尾部为浅黄绿色.将TGT法生长的Al2O3晶体(φ110×80mm3)依次经过高温氧化气氛、高温还原气氛脱碳、去色退火实验,即“两步法”退火实验,晶体变成无色、透明.经测试,Al2O3晶体的完整性、光学透过率和光学均匀性均有显著提高.

关键词: Al2O3晶体, 去色, 脱碳, 退火

Abstract: The sapphire boule grown by TGT is a bit colorful due to the volatilization of graphite heater at high temperature and absorptions of transitional metal ions in raw material. It is light red at the shoulder and little yellow at the bottle of the sapphire boule, respectively. The as-grown sapphire boule (φ110×80mm3) turns out colorless and transparent after being decolourized and decarbonized in air and hydrogen successively at high temperature. The quality, optical transmissivity and homogeneity of the sapphire boule have remarkably improved.

Key words: TGT-sapphire, decolourization, decarbonization, annealing

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