MgO-Containing oxynitride glasses and glass-ceramics
AssigneeCorning Glass Works
InventorRaja R. Wusirika
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Abstract
Thermally crystallizable silicon oxynitride glasses containing substantial quantities of MgO, thermally crystallizable to fine-grained glass-ceramic products comprising forsterite, clinohumite and/or a beta-silicon nitride solid solution as the predominant crystal phase, are described.
Claims1
A batch composition for a thermally crystallizable MgO-SiO.sub.2 -N glass, said glass being thermally crystallizable to a fine-grained glass-ceramic product comprising forsterite, clinohumite and/or beta-silicon nitride solid solution as the predominant crystal phase, said composition consisting essentially, in parts by weight on the oxide basis, based on a total of 100 parts by weight, of about 30-55 parts MgO, 45-75 parts SiO.sub.2, 4-8 parts N, 0-15 parts Al.sub.2 O.sub.3 and 0-7 parts F.
Dependencies are inferred from the claim text.