Coloring Mechanism and Color Modification of Yellow Sapphire from Africa

被引：0

作者：

Han X. ^{[1
,2
]}

Kang Y. ^{[3
]}

Feng X. ^{[4
]}

Li Y. ^{[5
]}

Guo S. ^{[1
]}

机构：

[1] Jewelry College, Shanghai Jianqiao University, Shanghai

[2] Gemstone Testing Center, East China University of Science & Technology, Shanghai

[3] Research Center of Analysis and Test, East China University of Science & Technology, Shanghai

[4] Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai

[5] School of Materials Science and Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2019年 / 47卷 / 07期

关键词：

Color mechanism; Fe[!sup]2+[!/sup]- Fe[!sup]3+[!/sup] ion pair; Optical absorption spectra; Reduction annealing; Sapphire;

D O I：

10.14062/j.issn.0454-5648.2019.07.17

中图分类号：

学科分类号：

摘要：

The elements and optical absorption spectra of yellow sapphire with a high iron content and a low content of other transition metal elements from Africa were characterized by laser ablation inductively coupled plasma mass spectroscopy and ultraviolet visible near-infrared spectroscopy. The results show that the color of yellow sapphire is jointly contributed to outer d-electron of Fe3+ and charge transfer of O2- and Fe3+. Fe2+-Fe3+ is formed in the yellow sapphire by reduction annealing, and its color changes from yellow to dark blue. The formation of Fe2+-Fe3+ and the change of the color of yellow sapphire support a previous conclusion that 'Fe2+-Fe3+ ion pair can make corundum blue' proposed by Dr. Fritsch in 1993. This work could provide some ideas and theoretical basis for color modification of natural yellow sapphire and dark blue sapphire from Changle, Shandong. © 2019, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：990 / 994

页数：4

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