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US 11,236,011 B2Granted
Transparent glass-ceramic articles, glass-ceramic precursor glasses and methods for forming the same
AssigneeCorning Incorporated
InventorsGeorge Halsey Beall, Charlene Marie Smith, Steven Alvin Tietje
Life of this patent
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Abstract
Embodiments of glass ceramic articles and precursor glasses are disclosed. In one or more embodiments, the glass-ceramic articles are transparent and include a nepheline phase and a phosphate phase. The glass-ceramic articles are colorless and exhibit a transmittance of about 70% or greater across the visible spectrum. The glass-ceramic articles may optionally include a lithium aluminosilicate phase. The crystals of the glass-ceramic articles may have a major cross-section of about 100 nm or less.
Claims13
A method of forming a glass-ceramic article, comprising:
- heat treating a precursor glass article by heating the precursor glass article at a rate in the range from about 1° C./minute to about 10° C./minute to a crystallization temperature (Tc) in the range from about 600° to about 1000° C.;
- maintaining the precursor glass article at the Tc to produce a glass-ceramic article having a nepheline crystalline phase and a phosphate phase;
- and
- cooling the glass-ceramic article to about room temperature.
1 more element
Dependencies are inferred from the claim text.