Formation and properties of nitrogen-rich strontium silicon oxynitride glasses |
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Authors: | Ali Sharafat Bertil Forslund Jekabs Grins Saeid Esmaeilzadeh |
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Affiliation: | (1) Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, 10691, Sweden |
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Abstract: | Glass formation in the system Sr–Si–O–N was investigated and properties of obtained glasses evaluated. The glass-forming region
was determined for glasses prepared by melting mixtures of Sr metal, SiO2 and Si3N4 powders in Nb crucibles at 1600–1750 °C in nitrogen atmosphere using a radio frequency furnace. The glasses were found to
be homogenous, translucent gray to opaque black, and to contain high contents of N (up to 45 e/o) and Sr (up to 36 e/o). The
glass transition temperature (790–973 °C), density (2.99–4.07 g/cm3), microhardness (8.10–10.50 GPa), and refractive index (1.65–1.93) are strongly correlated with the amounts of Sr and N.
The properties are compared with findings in other oxynitride silicate glass systems. |
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