Infrared transmitting glasses with high glass transition tempera

Details Infrared transmitting glasses with high glass transition tempera Infrared transmitting glasses with high glass transition tempera

1989-01-23

1990-07-17

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501904, C03C 332

Patent

active

049421441

ABSTRACT:
A chalcogenide glass capable of infrared transmission which is either sulfur, selenium or tellurium based and consists of compositions of the formula MX+M.sub.2 'X.sub.3 +SiX.sub.2, wherein M is one of the metals calcium, strontium, barium, zinc and lead, and M' is either aluminum or gallium and X is either sulfur, selenium or tellurium. Aluminum or gallium chalcogenide acts to increase the covalent bonding network structure of the glass with the result being that excellent high temperature 8-14 micron IR transmitting glasses with transition temperatures above 500.degree. C. are prepared.

REFERENCES:
patent: 2883291 (1959-04-01), Fraser
patent: 3188216 (1965-06-01), Burton et al.
patent: 3841739 (1975-10-01), Asahara et al.
patent: 4492763 (1985-01-01), Trotta et al.
patent: 4557914 (1985-12-01), Modone
patent: 4612294 (1986-09-01), Katsuyama et al.
Hilton, Nonoxide Chalcogenide Glasses as Infrared Optic Materials, Applied Optics, vol. 5, No. 12, Dec. 1966.

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