The influence of Be addition on the structure and thermal properties of alkali-silicate glasses - Publikacja - MOST Wiedzy

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The influence of Be addition on the structure and thermal properties of alkali-silicate glasses

Abstrakt

Be-Na-(Li)-Si oxide glasses containing up to 15 mol% of BeO were prepared. Their structure was characterized by X-ray powder diffraction and Raman as well as infrared spectroscopic techniques, while their chemical compositions were examined by Inductively Coupled Plasma Optical Emission Spectrometry. All materials were found to be amorphous and contain Al contaminations from minor dissolution of the alumina crucibles. The results of Raman and IR spectroscopies showed that BeO addition to Na-(Li)-Si glass systems resulted in the formation of [BeO4/2]2− tetrahedra which are inserted into the silicate glass network, demonstrating the intermediate glass-forming role of BeO. In parallel, the effective destruction of Si-O-Si bridges was observed by vibrational spectroscopy. The glass transition temperature was studied by Differential Thermal Analysis and found to range from about 431 °C to 551 °C. A significant increase in Tg by 70 °C was found as SiO2 was substituted by up to 15 mol% BeO.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF NON-CRYSTALLINE SOLIDS nr 521, strony 1 - 10,
ISSN: 0022-3093
Język:
angielski
Rok wydania:
2019
Opis bibliograficzny:
Wójcik N. A., Ali S., Möncke D., Tagiara N., Kamitsos E., Segawa H., Eriksson M., Jonson B.: The influence of Be addition on the structure and thermal properties of alkali-silicate glasses// JOURNAL OF NON-CRYSTALLINE SOLIDS. -Vol. 521, (2019), s.1-10
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.jnoncrysol.2019.119532
Weryfikacja:
Politechnika Gdańska

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