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Proceedings Paper

Coloration and decoloration of glasses by photo-irradiation and heat treatment for easily recycled glass products
Author(s): Kohei Kadono; T. Akai; M. Yamashita; J. Sheng; S. Chen; Z. Yao; N. Itakura; T. Yamate; Y. Utagawa; Y. Matsumoto; T. Yazawa
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Paper Abstract

We have been developing a technique of coloration and decoloration of glasses by photo-irradiation and heat-treatment for application to easily recyclable colored glass products. The mechanisms of the photo-induced coloration of glasses used in this research are a) the photo-induced defects (color centers) formation, b) the photo-induced change in oxidation state of ions, and c) the photo-induced formation of nanoparticles in glasses. The subjects for application of these phenomena to recyclable colored-glass products are presented. The research examples for each mechanism are presented in this paper as follows: 1) the effect of the doped Fe ions on the optical density and stability of coloration due to color centers, 2) the coloration by the change in oxidation state, (formula available in paper) and 3) the reversible coloration and decoloration for an Ag single-doped glass.

Paper Details

Date Published: 16 July 2003
PDF: 8 pages
Proc. SPIE 5061, International Symposium on Photonic Glass (ISPG 2002), (16 July 2003); doi: 10.1117/12.517342
Show Author Affiliations
Kohei Kadono, National Institute of Advanced Industrial Science and Technology (Japan)
T. Akai, National Institute of Advanced Industrial Science and Technology (Japan)
M. Yamashita, National Institute of Advanced Industrial Science and Technology (Japan)
J. Sheng, National Institute of Advanced Industrial Science and Technology (Japan)
S. Chen, National Institute of Advanced Industrial Science and Technology (Japan)
Z. Yao, National Institute of Advanced Industrial Science and Technology (Japan)
N. Itakura, Central Glass Co., Ltd. (Japan)
T. Yamate, Central Glass Co., Ltd. (Japan)
Y. Utagawa, Osaka Seiko Glass Co., Ltd. (Japan)
Y. Matsumoto, Osaka Seiko Glass Co., Ltd. (Japan)
T. Yazawa, Himeji Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 5061:
International Symposium on Photonic Glass (ISPG 2002)
Congshan Zhu, Editor(s)

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