Compositions: coating or plastic – Coating or plastic compositions – Alkali metal silicate containing
Patent
1975-12-17
1977-03-08
McCarthy, Helen M.
Compositions: coating or plastic
Coating or plastic compositions
Alkali metal silicate containing
65 3A, 65DIG7, 106 5D, 106 54, 350 96WG, 428373, C03C 308, G02B 514
Patent
active
040110060
ABSTRACT:
High silica content optical glasses, containing more volatile oxides such as GeO.sub.2 and B.sub.2 O.sub.3, are produced by plasma fusion of powders without inordinately high loss of the more volatile constituents. The powders are produced by a process including the heat treatment of intimately mixed materials, which include the glass forming constituents. Small quantities of GeO.sub.2 are included in borosilicate glass to suppress bubble formation. Pairs of glass compositions have been found, with sufficient index of refraction difference to produce guidance in optical transmission lines, while possessing sufficient thermal expansion match to reduce stresses in the line.
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patent: 1526423 (1925-02-01), Keyes
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patent: 3938974 (1976-02-01), Macedo et al.
Fleming, Jr. James William
Jaeger Raymond Edward
Miller Thomas John
Bell Telephone Laboratories Incorporated
Friedman Allen N.
McCarthy Helen M.
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