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US 2004/0110625 A1Published application
Method for making float glass having reduced defect density
AssigneePGG Industries Ohio, Inc.
InventorsCharlene S. Smith, George A. Pecoraro
Life of this patent
Estimating the term…
Abstract
A method for reducing the defect density of glass comprising melting a glass composition comprising from 65-75 wt. % of SiO2; from 10-20 wt. % of Na2O; from 5-15 wt. % of CaO; from 0-5 wt. % of MgO; from 0-5 wt. % of Al2O3; from 0-5 wt. % of K2O; from 0-2 wt. % Fe2O3; and from 0-2 % FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.
Claims10
A method for reducing the defect density of glass produced via a float glass process comprising
- a. melting a glass composition comprising:
- from 65-75 wt. % of SiO2;
- from 10-20 wt. % of Na2O;
- from 5-15 wt. % of CaO;
- from 0-5 wt. % of MgO;
- from 0-5 wt. % of Al2O3;
- from 0-5 wt. % of K2O;
- from 0-2 wt. % Fe2O3;
- and
- from 0-2 wt. % FeO,
- wherein the glass composition has a total field strength index of greater than or equal to 1.23.
8 more elements
A float glass composition comprising:
- from 65-75 wt. % of SiO2;
- from 10-20 wt. % of Na2O;
- from 5-15 wt. % of CaO;
- from 0-5 wt. % of MgO;
- from 0-5 wt. % of Al2O3;
- from 0-5 wt. % of K2O;
- from 0-2 wt. % Fe2O3;
- and
- from 0-2 wt. % FeO,
- wherein the glass composition has a total field strength index of greater than or equal to 1.23.
7 more elements
A float glass article comprising a glass composition comprising:
- from 65-75 wt. % of SiO2;
- from 10-20 wt. % of Na2O;
- from 5-15 wt. % of CaO;
- from 0-5 wt. % of MgO;
- from 0-5 wt. % of Al2O3;
- from 0-5 wt. % of K2O;
- from 0-2 wt. % Fe2O3;
- and
- from 0-2% FeO,
- wherein the glass composition has a total field strength index of greater than or equal to 1.23.
7 more elements
Dependencies are inferred from the claim text.