Aluminum borophosphate glass compositions

Details Aluminum borophosphate glass compositions Aluminum borophosphate glass compositions

1977-03-02

1978-11-28

Vertiz, O. R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 47Q, 106 54, 2523014P, C03C 314, C03C 316, C03C 328

Patent

active

041274156

ABSTRACT:
Novel glass compositions are provided which are enclosed by the iso-composition lines, 2 and 18 mole percent P.sub.2 O.sub.5, 30 and 70 mole percent Al.sub.2 O.sub.3 and 20 and 60 mole percent B.sub.2 O.sub.3. The compositions can contain the usual oxide modifiers. These composition are characterized by refractive indices between about 1.47 and 1.58, densities between about 2.1 and 2.7 gm/cm.sup.3, thermal expansion coefficients between about 26 .times. 17.sup.-7 /C.degree. and 55 .times. 10.sup.-7 /C.degree., and glass transition points of between about 600 and 820.degree. C.

REFERENCES:
patent: 1964629 (1934-06-01), Grimm
patent: 2486812 (1949-11-01), Weyl
patent: 3248234 (1966-04-01), Godron
Volf-Technical Glasses, pp. 401-402, SNTL Publishers, Prague and Sir Isaac Pitman, London (1961).

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