Method of producing oxynitride glass

Details Method of producing oxynitride glass Method of producing oxynitride glass

1991-09-27

1993-07-20

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 54, 501 97, 423325, C03C 311

Patent

active

052293360

ABSTRACT:
The high-purity, heat-resistant oxynitride glass can be produced by subjecting a fine silica powder block to a nitriding treatment by heating it while keeping it in contact with an ammonia-containing gas in a reducing environment, which is achieved by at least one of the following means: (a) embedding the fine silica powder block in carbon powder, (b) placing the fine silica powder block in a carbon pipe or container, and (c) introducing a reducing gas, and simultaneously or subsequently sintering it.

REFERENCES:
patent: 3149946 (1964-09-01), Elmer
patent: 4203744 (1980-05-01), Schultz et al.
patent: 4977125 (1990-12-01), Lednor
Journal of the American Ceramic Society, vol. 66, No. 11, Nov. 1983, pp. 758-764, C. J. Brinker, et al., "Oxynitride Glass Formation From Gels".
Journal of Non-Crystalline Solids, vol. 102, 1988, pp. 181-195, J. Schroeder, et al., "Nitrogen Doping of Fused Silica and Silicate Glasses: A Study of Transport and Optical Properties".
Function & Materials, vol. 1, 1989, pp. 42-50, S. Sakka, "New Process for Engineering Ceramics: Oxynitride Glass".
Patent Abstracts of Japan, vol. 12, No. 316 (C-524)(3163) Aug. 26, 1988, JP-A-63-85023, Fujikura Ltd.
C. Schrimpf et al, "Some Properties of Nitrogen-Containing Na.sub.2 O-CaO-SiO.sub.2 Glasses", Journal of Non-Crystalline Solids, vol. 52 (1982) pp. 479-485.
M. Pauthe et al, "Preparation of oxynitride silicon glasses II. Bulk oxynitride glasses obtained by hot pressing", Journal of Non-Crystalline Solids, vol. 125, (1990) pp. 195-201.
R. Wusirika, "Reaction of Ammonia with Fumed Silica", Journal of The American Ceramic Society, vol. 73, No. 10, (1990), pp. 2926-2929.
European Search Report, EP 91 11 6572, Nov. 27, 1992.

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