Method of producing an alkali-free glass
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United States of America Patent
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Apr 15, 2003
Issued Date -
N/A
app pub date -
Jul 17, 2001
filing date -
Aug 21, 1996
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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% SiO.sub.2, 6-25% Al.sub.2 O.sub.3, 5-20% B.sub.2 O.sub.3, 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% Sb.sub.2 O.sub.3 and at least one of 0.05-2% SnO.sub.2 and 0.005-1% Cl.sub.2, which fining agent makes the resultant glass free from bubbles without the use of toxic As.sub.2 O.sub.3 which has been known as the fining agent in the art.
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