Solarization resistant rare earth doped glasses
AssigneeCorning Incorporated
InventorsNicholas Francis Borrelli, Joseph Francis Schroeder, III, Wageesha Senaratne
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Abstract
Substantially alkali free glasses are disclosed which can be used to produce substrates for flat panel display devices. The glasses can have a loading of fluorine and ceria to achieve exemplary solarization and UV protection attributes when exposed to UV radiation. Methods for producing substantially alkali free glasses using a float or downdraw process (e.g., a fusion downdraw process) are also disclosed.
Claims20
A glass comprising fluoride and one or more rare earth metal oxides, wherein the fluoride has a content of at least 0.38 mol. % and the one or more rare earth metal oxides has a content of at least 0.42 mol. %, wherein the glass is alkali-free, and wherein the glass has a sharpness absorption greater than zero and an absorption cut off controllable between 300 nm and 450 nm.
A glass comprising, in weight percent on an oxide basis in the ranges:
- SiO2 45-65
- Al2O3 10-25
- B2O3 0-5
- MgO 0-5
- CaO 0-8
- SrO 0-5
- BaO 0-10,
- wherein the glass further comprises fluoride having a content of at least 0.38 mol. % and one or more rare earth metal oxides including Ce2O3 having a content of at least 0.42 mol. %, wherein the glass is alkali-free, and wherein the glass has a sharpness absorption greater than zero and an absorption cut off controllable between 300 nm and 450 nm.
An alkali-free glass comprising, in weight percent on an oxide basis in the ranges:
- SiO2 49-62
- Al2O3 16-20
- B2O3 1-2
- MgO 2-3
- CaO 3-5
- SrO 1-2
- BaO 6-8.5
- Ce2O3>0 to 10
- Sm2O3 0-2.5
- Eu2O3 0-2.5,
- wherein the glass further comprises fluoride having a content of at least 0.38 mol. %, wherein one or more rare earth metal oxides including Ce2O3, Sm2O3, and Eu2O3 has a content of at least 0.42 mol. %, and wherein the glass has a sharpness absorption greater than zero and an absorption cut off controllable between 300 nm and 450 nm.
Dependencies are inferred from the claim text.