Photosensitive glasses and glass ceramics and composite glass materials made therefrom
AssigneeCorning Incorporated
InventorsGeorge Halsey Beall, Nicholas Francis Borrelli, Joseph Francis Schroeder, III, Thomas Philip Seward, III
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Abstract
Photosensitive lithium zinc aluminosilicate glasses that can be selectively irradiated and cerammed to provide patterned regions of glass and lithium-based glass ceramic, and composite glass articles made from such glasses and glass ceramics are provided. The lithium zinc aluminosilicate glass can be negatively photosensitive or positively photosensitive to radiation having a wavelength in a range from about 248 nm to about 360 nm.
Claims18
A lithium zinc aluminosilicate glass comprising at least one sensitizing agent and at least one nucleating agent, wherein the lithium zinc aluminosilicate glass is negatively photosensitive to radiation having a wavelength in a range from 248 nm to 360 nm and comprises:
- from 60 wt % to 80 wt % SiO2;
- from 2 wt % to 12 wt % Al2O3;
- from 6 wt % to 10 wt % ZnO;
- from 2 wt % to 10 wt % Li2O;
- from 0 wt % to 5 wt % K2O;
- from 0 wt % to 6 wt % F−;
- from 0 wt % to 2 wt % CeO2;
- and
- from 0 wt % to 2 wt % Ag,
- wherein the sensitizing agent comprises at least one of silver or cerium, and the at least one nucleating agent comprises at least one halogen.
A lithium zinc aluminosilicate glass wherein the lithium zinc aluminosilicate glass is positively photosensitive to radiation having a wavelength in a range from 248 nm to 360 nm and comprises:
- from 65 wt % to 80 wt % SiO2;
- from 5 wt % to 16 wt % Al2O3;
- from 5 wt % to 12 wt % ZnO
- from 2 wt % to 14 wt % Li2O;
- from 0 wt % to 1 wt % Na2O;
- from 0 wt % to 1 wt % K2O;
- from 0 wt % to 6 wt % F−;
- from 0 wt % to 10 wt % Br−;
- from 0 wt % to 2 wt % CeO2;
- from 0 wt % to 2 wt % Ag;
- and
- from 0 wt % to 8 wt % ZrO2.
A composite glass article comprising:
- a first region and a second region in contact with the first region at an interface,
- the first region comprising a lithium-based glass ceramic, the lithium-based glass ceramic comprising a ceramic phase and a residual glass phase, wherein the ceramic phase comprises a lithium aluminosilicate phase having a lithium aluminosilicate stuffed β-quartz structure, and
- the second region comprising a lithium zinc aluminosilicate glass, wherein the lithium zinc aluminosilicate glass is transparent and comprises at least one sensitizing agent and at least one nucleating agent, and the lithium zinc aluminosilicate glass is negatively photosensitive and comprises:
- from 60 wt % to 80 wt % SiO2;
- from 3 wt % to 12 wt % Al2O3;
- from 6 wt % to 10 wt % ZnO;
- from 2 wt % to 10 wt % Li2O;
- from 0 wt % to 5 wt % K2O;
- from 0 wt % to 6 wt % F−;
- from 0 wt % to 2 wt % CeO2;
- and
- from 0 wt % to 2 wt % Ag,
- wherein the at least one sensitizing agent comprises at least one of silver or cerium, and the at least one nucleating agent comprises at least one halogen, wherein the lithium zinc aluminosilicate glass is photosensitive to radiation having a wavelength in a range from 248 nm to 360 nm .
Dependencies are inferred from the claim text.