Dense barium crown optical glasses

Details Dense barium crown optical glasses Dense barium crown optical glasses

1993-10-18

1994-12-06

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 69, 501 77, C03C 3091, C03C 3064

Patent

active

053710487

ABSTRACT:
A dense barium crown glass consisting essentially of, as calculated in weight % on an oxide basis, 35-42% SiO.sub.2, 11-17% B.sub.2 O.sub.3, 5.5-7.7% Al.sub.2 O.sub.3, 35-42% BaO, 0.25-1.5% Li.sub.2 O. The glasses have a liquidus temperature bellow 900.degree. C. and a viscosity at the liquidus temperature that is greater than 1000 Pa.s (10,000 poises).

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patent: 4593006 (1986-06-01), Takabatake et al.
Volf, Chemical Approach to Glass, pp. 471-474, 1984 no month.

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