Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1991-07-29
1993-06-01
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
252478, 313480, C03C 3095
Patent
active
052159442
ABSTRACT:
A glass, which is particularly adapted to be melted in conventional glass melting furnaces and formed on a molten tin bath, and which demonstrates exceptional absorption of X-rays with a minimum linear absorption coefficient, measured at 0.6 Angstroms, of 24/cm. and having excellent resistance to electron browning and/or X-ray browning and contains the following components, by weight percent: SiO.sub.2 and Al.sub.2 O.sub.3 constituting about 57.0 to 68.0% with SiO.sub.2 constituting about 57.0 to 66.0% and Al.sub.2 O.sub.3 constituting about 0 to 5.0%; K.sub.2 O and Na.sub.2 O constituting about 10.0 to 18.0% with K.sub.2 O constituting about 7.0 to 11.0% and Na.sub.2 O constituting about 4.0 to 8.0%; BaO and SrO constituting about 16.0 to 24.0% with BaO constituting about 0 to 13.0% and SrO constituting about 11.0 to 21.0%; and CeO.sub.2 constituting about 0.1 to 1.0%.
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Bell Mark L.
PPG Industries Inc.
Siminerio Andrew C.
LandOfFree
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