Chin. J. Semicond. > 2006, Volume 27 > Issue 2 > 245-248

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Decarbonization and Decolorization of Large Sapphire Crystals Grown by the Temperature Gradient Technique

Xu Jun, Zhou Guoqing, Deng Peizhen, Si Jiliang, Qian Xiaobo, Wang Yinzhen, Zhou Shengming, Zhou Yongzong and Zhu Renyuan

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Abstract: A crystalline sapphire (Al2O3) boule (110×80mm3) grown by the temperature gradient technique (TGT) is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the absorption of transitional metal inclusions in the raw material.The sapphire becomes colorless and transparent after decolorization and decarbonization in successive annealings in air and hydrogen at high temperatures.The quality,optical transmissivity,and homogeneity of the sapphire are remarkably improved.

Key words: sapphiredecolorizationdecarbonizationannealing

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    Received: 20 August 2015 Revised: Online: Published: 01 February 2006

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      Xu Jun, Zhou Guoqing, Deng Peizhen, Si Jiliang, Qian Xiaobo, Wang Yinzhen, Zhou Shengming, Zhou Yongzong, Zhu Renyuan. Decarbonization and Decolorization of Large Sapphire Crystals Grown by the Temperature Gradient Technique[J]. Journal of Semiconductors, 2006, In Press. Xu J, Zhou G Q, Deng P Z, Si J L, Qian X B, Wang Y Z, Zhou S M, Zhou Y Z, Zhu R Y. Decarbonization and Decolorization of Large Sapphire Crystals Grown by the Temperature Gradient Technique[J]. Chin. J. Semicond., 2006, 27(2): 245.Export: BibTex EndNote
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      Xu Jun, Zhou Guoqing, Deng Peizhen, Si Jiliang, Qian Xiaobo, Wang Yinzhen, Zhou Shengming, Zhou Yongzong, Zhu Renyuan. Decarbonization and Decolorization of Large Sapphire Crystals Grown by the Temperature Gradient Technique[J]. Journal of Semiconductors, 2006, In Press.

      Xu J, Zhou G Q, Deng P Z, Si J L, Qian X B, Wang Y Z, Zhou S M, Zhou Y Z, Zhu R Y. Decarbonization and Decolorization of Large Sapphire Crystals Grown by the Temperature Gradient Technique[J]. Chin. J. Semicond., 2006, 27(2): 245.
      Export: BibTex EndNote

      Decarbonization and Decolorization of Large Sapphire Crystals Grown by the Temperature Gradient Technique

      • Received Date: 2015-08-20

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