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Glasses and their crystallization in the (1-x)KNbO3 center dot xSiO(2) system at low glass-forming oxide contents, 0 <= x <= 0.35статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Sigaev V.N., Ryzhenkov V.S., Lotarev S.V., Golubev N.V., Stefanovich S.Yu, Okada Akira
- Журнал: Journal of Non-Crystalline Solids
- Том: 356
- Номер: 20-22
- Год издания: 2010
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 958
- Последняя страница: 965
- DOI: 10.1016/j.jnoncrysol.2010.02.003
- Аннотация: Glasses based on the K2O-Nb2O5-SiO2 system have been a subject of numerous studies thanks to promising electro-optical and non-linear optical properties. Most of the studies of Nb-containing glasses deal with compositions including not less than 40 mol% of SiO2 or B2O3. In the present work, we studied glass-forming and crystallization properties of (1 - x)KNbO3 center dot xSiO(2) glasses with x varying from 0 to 35 mol% by melt quenching between steel plates or by exposure to air or nitrogen flow. Thin transparent glassy plates can be obtained by quenching via pressing between metal plates for glasses with x >= 0.12, and transparent glass-ceramics allowing a remarkable second harmonic generation (SHG) response can be formed by heat-treatment near the first exothermic differential thermal analysis (DTA) peak over a wide range of glass compositions. It is shown that in these glasses, the crystalline K4Nb6O17 phase and a small amount of ferroelectric KNbO3, along with ceolite-like, cristobalite and alpha-quartz SiO2 phases precipitate at low temperatures in the range between the glass transition point, T-g, and the first exothermic peak on DTA curve, whereas ferroelectric KNbO3 precipitates at temperatures above 800 degrees C. Ferroelectric crystals which precipitate in the glass bulk are shown to produce high SHG activity. (C) 2010 Elsevier B.V. All rights reserved.
- Добавил в систему: Стефанович Сергей Юрьевич