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https://elib.bsu.by/handle/123456789/206550| Title: | Влияние фторирования на радиационно-оптические характеристики золь-гель кварцевых стекол |
| Other Titles: | Influence of fluorination on radiation-optical characteristics of the sol-gel quartz glasses / G.A.Lisovskij, I.M.Mel’nichenko, V.A.Saechnikov |
| Authors: | Лисовский, Г. А. Мельниченко, И. М. Саечников, В. А. |
| Keywords: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
| Issue Date: | 1999 |
| Publisher: | Минск : БГУ |
| Citation: | Взаимодействие излучений с твердым телом: Материалы III междунар. науч. конф., 6-8 окт. 1999 г., Минск: В 2 ч. Ч.2. — Мн.: БГУ, 1999. — С. 62-64. |
| Abstract (in another language): | Influence of the high temperature annealing of xerogels in environment of gases containing fluorine and chlorine on spectra of both photoluminescence and optical absorption of the sol-gel quartz glasses irradiated by gamma quantum was investigated. Samples were synthesised on the base of hydrolysis of tetraethylorthosilicate. A contain of hydroxyl groups in glasses of three parties was-8, 60 and 2000 ppm. After gamma irradiation the luminescence spectra had the 1,9 eV band caused by absorption on non-bridging-oxygen-hole centres (NBOHC). Intensity of the band correlates with OH-groups contain. This fact gives possibility to suppose that the Si-OH structure fragments are precursors of the 1,9 eV band. NBOHC are generated at radiolytic break-off of hydrogen atoms from hydroxyl groups. In optical absorption spectra the NBOHC 580 nm band was detected (except samples from party 1) which shifted during irradiation to position 620 nm. The shifting was explained by reduction of hydrogen binding effect between NBOHC and hydroxyl groups. The 212 nm band dominated in ultraviolet spectrum. It was shown that fluorination of xerogels on technological stage before baking reduces essentially quantity of hydroxyl groups, improves optical quality of glasses and rises their radiation-optical resistance |
| URI: | http://elib.bsu.by/handle/123456789/206550 |
| ISBN: | 985-445-237-9 |
| Appears in Collections: | 1999. Взаимодействие излучений с твердым телом |
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