Colored glass

Details Colored glass Colored glass

1992-07-08

1993-09-07

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 64, 501 66, 501 67, 501 77, 501 78, 501905, C03C 311, C03C 402

Patent

active

052428699

ABSTRACT:
This invention provides (1) a colored glass comprising 20 to 85% by weight of SiO.sub.2, 2 to 75% by weight of B.sub.2 O.sub.3, not more than 15% by weight of Al.sub.2 O.sub.3, not more than 30% by weight of at least one member of Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O, not more than 10% by weight of at least one member of MgO, CaO, ZnO, BaO, SrO and PbO, not more than 10% by weight of at least one member of ZrO.sub.2, La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Ta.sub.2 O.sub.3 and Gd.sub.2 O.sub.3, 0.05 to 15% by weight of at least one copper halide, and 0.001 to 7% by weight of at least one member of oxides of Fe, Ni, Mn, Co, V, Cr, Cu, Nd and Pd; and (2) a colored glass comprising 8 to 25% by weight of SiO.sub.2, 5 to 35% by weight of P.sub.2 O.sub.5, not more than 30% by weight of B.sub.2 O.sub.3, 10 to 35% by weight of Al.sub.2 O.sub.3, 5 to 20% by weight of at least one member of Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O, not more than 20% by weight of at least one member of MgO, CaO, ZnO, BaO, SrO and PbO, not more than 10% by weight of at least one member of ZrO.sub.2, La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Ta.sub.2 O.sub.3 and Gd.sub.2 O.sub.3, 0.05 to 15% by weight of at least one copper halide, and 0.001 to 7% by weight of at least one member of oxides of Fe, Ni, Mn, Co, V, Cr, Cu, Nd and Pd.

REFERENCES:
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patent: 4222781 (1980-09-01), Morse et al.
patent: 4374931 (1983-02-01), Courbin et al.
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patent: 4746633 (1988-05-01), Mazeau et al.
patent: 4757034 (1988-07-01), Prassas
patent: 5024974 (1991-06-01), Nakamura et al.
patent: 5145805 (1992-09-01), Tarumi et al.
C. R. Bamford, "The Application of the Ligand Field Theory to Coloured Glasses", Research Laboratories, Pilkington Brothers Limited, Lathom, Ormskirk, Lancashire, Physics and Chemistry of Glasses, vol. 3, No. 6, Dec. 1962, pp. 189-202.
Woldemar A. Weyl, "Coloured Glasses", Society of Glass Technology, 1951, pp. 89-234.

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