Rare earth oxynitride glasses

Details Rare earth oxynitride glasses Rare earth oxynitride glasses

1989-07-27

1990-07-10

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 56, C03C 3062, C03C 311

Patent

active

049406787

ABSTRACT:
This invention relates to glasses consisting essentially, by weight, of about 35-72% Ln.sub.2 O.sub.3, 5-37% Al.sub.2 O.sub.3, 29-56% SiO.sub.2, and 4-7.5% N. Up to about one-half of the Ln.sub.2 O.sub.3 on an atomic basis may be replaced with SrO and/or BaO. A transparent glass can be formed which contains about 40-60% on a molar basis of Ln.sub.2 O.sub.3 +SrO and/or BaO and wherein the atomic ratio Sr and/or Ba:Sr and/or Ba+Ln >0.4.

REFERENCES:
patent: 4609631 (1986-09-01), Messier et al.
Loehman, R.; "Preparation and Properties of Yttrium-Silicon-Aluminum Oxynitride Glasses", Journal of The American Ceramic Society, vol. 62, No. 9, Oct. 1979, pp. 491-494.
Lang, J. et al; "The Glassy Phase in the Lanthanide-Silicon-Aluminum-Oxygen-Nitrogen System", Mater. Sci. Monogr 1982, 10 (React solids, v2), 506-511.

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