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Volume 5 Issue 4
Dec.  2003
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YANG Ru-zeng, CHENG Yi. Diffusion Coefficients of Fe2+ and Ti4+ and Their Influence on Process of Diffusion Treatment of Sapphire[J]. Journal of Gems & Gemmology, 2003, 5(4): 7-10.
Citation: YANG Ru-zeng, CHENG Yi. Diffusion Coefficients of Fe2+ and Ti4+ and Their Influence on Process of Diffusion Treatment of Sapphire[J]. Journal of Gems & Gemmology, 2003, 5(4): 7-10.
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Diffusion Coefficients of Fe2+ and Ti4+ and Their Influence on Process of Diffusion Treatment of Sapphire

  • Gemmological Education Center, Tongji University, Shanghai 200092, China

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  • Received Date: July 24, 2003
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    • Abstract
  • The diffusion coefficients of Fe2+ and Ti4+ and their influence on the process of diffusion treatment of sapphire are discussed. According to the thickness of the diffusion layer and the process of the diffusion-treated sapphire from Thailand, the diffusion coefficients of the Fe2+ and Ti4+ are computed. Experiment shows that diffusion coefficient of the colouration ion is important in working out the diffusion process.
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    • References (4)
  • [1]
    Kane R E,Kammerling R C,Koivula J I,etal.The identification of blue diffusion-treated sapphires[J].Gems and Gemology, 1990,26(2):115-113.
    [2]
    Nassau K. The early history of gemstones treatments[J]. Gemsand Gemology, 1984,20(1):22-33.
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    彭明生.宝石优化处理与现代测试技术[M].北京:科学出版社,1995.6.
    [4]
    戚正风.固态金属中的扩散与相变[M].北京:机械工业出版社,1998.12.
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