Process for producing optically translucent ceramic

Details Process for producing optically translucent ceramic Process for producing optically translucent ceramic

1982-05-25

1983-11-29

McCarthy, Helen M.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Optical fiber, waveguide, or preform

264 63, 264 65, 264 66, 264325, 264332, 264345, 423327, 501 12, 501128, 501153, 501154, B29D 1100, C04B 3518

Patent

active

044180241

ABSTRACT:
Amorphous mixed oxide powder composed of from about 74 weight % to about 76.5 weight % Al.sub.2 O.sub.3 balance SiO.sub.2 is pressed into a compact with a density of at least 1 g/cc, fired in oxygen or vacuum of 0.05 to 1 torr producing a gas-impermeable compact, and sintered in air, argon, helium, nitrogen or mixtures thereof producing an optically translucent theoretically dense body of mullite.

REFERENCES:
patent: 3989783 (1976-11-01), McGee et al.
patent: 4101615 (1978-07-01), Horikiri et al.
patent: 4266978 (1981-05-01), Prochazka
B. E. Yoldas, "Microstructure of Monolithic Materials Formed by Heat Treatment of Chemically Polymerized Precursors in the Al.sub.2 O.sub.3 --SiO.sub.2 Binary", vol. 59, No. 4, pp. 479-483 (1980).
"Advanced Optical Ceramics, Phase II", Book 1 of 2, ONR Contract No. N00014-78-C-0466 (DIN: 80SDR2172) General Electric Co., pp. 1-14 and 21-42 (Aug. 31, 1980).
"Program Review-Advanced Optical Ceramics-Phase II, Government/Industry Briefing", ONR Contract No. N00014-78-C-0466, DARPA Order No. 3387, General Electric Company, p. C-9 (May 8-9, 1980).
K. S. Mazdiyasni & L. M. Brown, "Synthesis and Mechanical Properties of Stoichiometric Aluminum Silicate (Mullite)", vol. 55, No. 11, pp. 548-552, (Nov. 1972).

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