Alkali-free glass and method for producing the same

Details Alkali-free glass and method for producing the same Alkali-free glass and method for producing the same

2005-08-23

2005-08-23

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

Reexamination Certificate

active

06933253

ABSTRACT:
An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3and at least one of 0.05-2% SnO2and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3which has been known as the fining agent in the art.

REFERENCES:
patent: 4994415 (1991-02-01), Imai et al.
patent: 5770535 (1998-06-01), Brix et al.
patent: 6468933 (2002-10-01), Narita et al.
patent: 2002/0151426 (2002-10-01), Murata et al.
patent: 0 805 125 (1997-11-01), None
patent: 2001-1511534 (2001-06-01), None

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