Coloration in soda-lime-silicate glass system containing manganese
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Author list: Srisittipokakun N., Kedkaew C., Kaewkhao J., Limsuwan P.
Publisher: Trans Tech Publications
Publication year: 2010
Volume number: 93-94
Start page: 206
End page: 209
Number of pages: 4
ISBN: 0878492852; 9780878492855
ISSN: 1022-6680
eISSN: 1662-8985
Languages: English-Great Britain (EN-GB)
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Abstract
The UV-visible spectra of soda-lime-silicate glass system with the base composition (65-x) SiO2: 10CaO: 25Na2O: xMnO2 % mol, (where x is 0.0, 0.02, 0.05, 0.10, 0.30 and 0.50 %mol) were studied at room temperature. The results are shown that the colors of glass samples were altered from colorless to dark purple with increasing of MnO2 concentration and were stable at room temperature. The color of glass sample with 0.3 %mol MnO2 was purple. Moreover, it has been found that the density and refractive index were contiguous. The optical absorption spectra can be confirmed the color of these glass samples. They exhibited a predominant broadband around 500nm and it was clearly observed, its increasing since 0.1 %mol of MnO2. This band corresponds to an allowed transition from 5Eg→ 5T2g, which attributed to Mn3+. When increasing MnO2concentration, the absorption band due to Mn3+ ion was dominating. © (2010) Trans Tech Publications.
Keywords
Manganese
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