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Glasses in the Ba–Si–O–N System
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Glass group)
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Glass group)
2011 (English)In: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 94, no 9, p. 2912-2917Article in journal (Refereed) Published
Abstract [en]

The preparation and properties of Ba–Si–O–N glasses arereported. These oxynitride glasses were prepared by meltingmixtures of BaH2, SiO2, and Si3N4 powders in a nitrogenatmosphere at 1550°–1700°C. The glasses were characterized by X-ray powder diffraction, differential thermal analysis, and scanning electron microscopy. Final 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 behomogenous, translucent gray to opaque black, and consists of N contents of up to 42 equiv% and Ba contents of up to 36 equiv%. Determined glass densities varied between 3.27 and 4.18 g/cm3, and calculated molar volumes varied between1 0.28 and 11.11 cm3/mol. Both density and molar volume increase with Ba content. Glass compactness (0.45–0.49), glasstransition temperature (786°–905°C), and microhardness (7.93–9.56 GPa) were found to increase linearly with N content. There fractive index increased from 1.66 to 1.91 and was found tobe strongly correlated with the amounts of Ba and N.

Place, publisher, year, edition, pages
Wiley , 2011. Vol. 94, no 9, p. 2912-2917
Keywords [en]
Oxynitride glass; glass forming region; nitrogen content; hardness; refractive index; Ba-Si-O-N.
National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering), Glass Technology
Identifiers
URN: urn:nbn:se:lnu:diva-14994DOI: 10.1111/j.1551-2916.2011.04718.xScopus ID: 2-s2.0-80052987128OAI: oai:DiVA.org:lnu-14994DiVA, id: diva2:448659
Available from: 2011-10-17 Created: 2011-10-17 Last updated: 2017-12-08Bibliographically approved

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Ali, SharafatJonson, Bo

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