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US 2021/0230045 A1Published application
Low alkali high transmission glasses
AssigneeCorning Incorporated
InventorsMELISSANN MARIE Ashton-Patton, Ellen Anne King
Life of this patent
Estimating the term…
Abstract
Compounds, compositions, articles, devices, and methods for the manufacture of light guide plates and back light units including such light guide plates made from glass. In some embodiments, light guide plates (LGPs) are provided that have similar or superior optical properties to light guide plates made from PMMA and that have exceptional mechanical properties such as rigidity, CTE and dimensional stability in high moisture conditions as compared to PMMA light guide plates.
Claims14
1-16. (canceled)
A glass article, comprising:
- a glass sheet with a front face having a width and a height, a back face opposite the front face, and a thickness between the front face and back face having four edge surfaces around the front and back faces,
- wherein the glass sheet is substantially free of alkali and comprises:
- from about 64 mol % to about 71 mol % SiO2,
- from about 9 mol % to about 12 mol % Al2O3,
- from about 7 mol % to about 12 mol % B2O3,
- from about 1 mol % to about 3 mol % MgO,
- from about 6 mol % to about 11.5 mol % CaO,
- from about 0 mol % to about 2 mol % SrO,
- from about 0 mol % to about 0.1 mol % BaO,
- from about 0.01 mol % to about 0.5 mol % SnO2,
- less than 1 ppm each of Co, Ni, and Cr, and
- less than about 50 ppm of Fe.
9 more elements
A glass article, comprising:
- a glass sheet with a front face having a width and a height, a back face opposite the front face, and a thickness between the front face and back face having four edge surfaces around the front and back faces,
- wherein the glass sheet comprises:
- from about 64 mol % to about 71 mol % SiO2,
- from about 9 mol % to about 12 mol % Al2O3,
- from about 7 mol % to about 12 mol % B2O3,
- from about 1 mol % to about 3 mol % MgO,
- from about 6 mol % to about 11.5 mol % CaO,
- from about 0 mol % to about 2 mol % SrO,
- from about 0 mol % to about 0.1 mol % BaO,
- from about 0.01 mol % to about 0.5 mol % SnO2,
- less than 0.5 mol % of any one or combination of Na2O, K2O, Li2O,
- less than 1 ppm each of Co, Ni, and Cr, and
- less than about 50 ppm of Fe.
10 more elements
A glass article, comprising:
- a glass sheet with a front face having a width and a height, a back face opposite the front face, and a thickness between the front face and back face having four edge surfaces around the front and back faces,
- wherein the glass sheet comprises:
- from about 64 mol % to about 71 mol % SiO2,
- from about 9 mol % to about 12 mol % Al2O3,
- from about 7 mol % to about 12 mol % B2O3,
- from about 1 mol % to about 3 mol % MgO,
- from about 6 mol % to about 11.5 mol % CaO,
- from about 0 mol % to about 2 mol % SrO,
- from about 0 mol % to about 0.1 mol % BaO,
- from about 0.01 mol % to about 0.5 mol % SnO2,
- an alkali to Al2O3 ratio of less than or equal to 0.5,
- less than 1 ppm each of Co, Ni, and Cr, and
- less than about 50 ppm Fe.
10 more elements
Dependencies are inferred from the claim text.