Decolorisation and Decarbonisation Study on Sapphire Grown by TGT

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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. 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

Abstract

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

CLC Number:

O782

XU Jun,ZHOU Guo-Qing,DENG Pei-Zhen,SI Ji-Liang,QIAN Xiao-Bo,ZHOU Yong-Zhong,WANG Yin-Zhen,ZHOU Sheng-Ming,ZHU Ren-Yuan. Decolorisation and Decarbonisation Study on Sapphire Grown by TGT[J]. Journal of Inorganic Materials.

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Decolorisation and Decarbonisation Study on Sapphire Grown by TGT

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