Potassium fluoroborate silicate glasses

Details Potassium fluoroborate silicate glasses Potassium fluoroborate silicate glasses

1980-05-30

1982-03-30

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

350 963, 350 9634, 501 3, 501 32, 501 35, 501 37, 501 25, 501903, C03C 308, C03C 318

Patent

active

043225004

ABSTRACT:
A potassium fluoro-borate glass, including silica and optionally alumina, containing at least 20 mole % potassium computed as K.sub.2 (O,F.sub.2), and wherein there are more fluorine atoms in the glass than oxygen atoms. The range of compositions includes low refractive index glasses, some with refractive indices less than that of silica, and high coefficient of thermal expansion glasses, some with coefficients matching those of aluminum, copper and brass.

REFERENCES:
patent: 2038691 (1936-04-01), Taylor
patent: 3671380 (1972-06-01), Awi et al.
patent: 3764354 (1973-10-01), Ritze et al.
patent: 3877953 (1975-04-01), Broemer et al.
patent: 3877995 (1975-04-01), Levine et al.
patent: 4221825 (1980-09-01), Guerder et al.
Chem. Abstracts, vol. 80, item 51730x.

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