SiO.sub.2 -AlPO.sub.4 Glass batch compositions

Details SiO.sub.2 -AlPO.sub.4 Glass batch compositions SiO.sub.2 -AlPO.sub.4 Glass batch compositions

1969-10-03

1976-03-09

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 54, C03C 306, C03C 308

Patent

active

039429911

ABSTRACT:
Glass batch compositions for producing low to medium expansion glasses having linear coefficients of thermal expansion in the range of from about 4.1 .times. 10.sup.-.sup.7 to about 19.0 .times. 10.sup.-.sup.7 in./in./.degree.C. over a temperature range from 0.degree.-300.degree..C. The glass batch compositions are capable of being melted at a temperature of about 1600.degree.C. and are composed essentially of a finely divided admixture of 70-87 mole percent SiO.sub.2 and 1.0-10 mole percent AlPO.sub.4 together with 0-21 mole percent of at least one RO.sub.2 oxide selected from the group consisting of from 0-14 mole percent TiO.sub.2 and 0-10 mole percent GeO.sub.2. The total mole percent of SiO.sub.2 and AlPO.sub.4 preferably constitute at least 79 mole percent of the total glass batch composition.

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Kingery, W. D., Introduction to Ceramics, New York, 1960 pp. 473-476.
Syritskaya et al., Latvisas PSR Zinatnu (Kimijas Serisa) 1964, [4] pp. 411-418.
Robinson et al., ... System SiO.sub.2 -Al.sub.2 O.sub.3 -P.sub.2 O.sub.5, in Journ. Amer. Cer. Soc., 47[11] pp. 587-592.
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