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Glass forming regio...
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Esmaeilzadeh, SaeidStockholms universitet,Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi
(author)
Glass forming region in Ca-Si-O-N system using CaH2 as Ca source
- Article/chapterEnglish2008
Publisher, publication year, extent ...
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Elsevier BV,2008
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-15477
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-15477URI
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https://doi.org/10.1016/j.jeurceramsoc.2008.04.017DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The present work explores the glass-forming region in the Ca–Si–O–N system, particularly in the N-rich part of the system. Bulk oxynitride glasses in the Ca–Si–O–N system were prepared by melting mixtures of CaH2, SiO2 and Si3N4 powders in a nitrogen atmosphere at 1500–1650 °C. The glasses were characterized by X-ray powder diffraction, differential thermal analysis, scanning electron microscopy and transmission electron microscopy. Glass compositions were calculated from analyses obtained by energy dispersive X-ray (EDX) spectroscopy and combustion analysis, for cation and anion compositions, respectively. The glasses were found to be X-ray amorphous and gray to black in color. The glasses retain up to 58 e/o of nitrogen and 42 e/o of calcium. The glass formation depends on reaction kinetics and the precursor used. A strong exothermic reaction is observed at 850–1000 °C, leading to formation of amorphous and crystalline oxynitride phases that melt at high temperatures upon further heating. Glass transition temperatures (Tg) were observed to vary between 798 °C and 1050 °C, and crystallization occurs typically 130 °C above the glass transition temperature. The glass densities vary between 2.79 g/cm3 and 3.25 g/cm3.
Subject headings and genre
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Oxynitride glass
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Glass-forming region
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Calcium content
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Nitrogen content
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Ca–Si–O–N
Added entries (persons, corporate bodies, meetings, titles ...)
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Grins, J.Stockholms universitet,Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi
(author)
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Sharafat, AliStockholms universitet,Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi(Swepub:su)ashar
(author)
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Stockholms universitetInstitutionen för fysikalisk kemi, oorganisk kemi och strukturkemi
(creator_code:org_t)
Related titles
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In:Journal of the European Ceramic Society: Elsevier BV28:14, s. 2659-26640955-22191873-619X
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