Colored glass-ceramic
AssigneeCorning Incorporated
InventorsBruce G. Aitken, Robert W. Pfitzenmaier, Charles C. Smith, Jr.
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Abstract
A transparent glass-ceramic and an article of cookware formed therefrom. The glass-ceramic has as its primary crystal phase a beta-quartz solid solution, contains an amount of TiO.sub.2 effective as a nucleating agent up to about 6%, and has a color package composed of 50 to 150 ppm Co.sub.3 O.sub.4, 50 to 250 ppm NiO and 400 to 1000 ppm Fe.sub.2 O.sub.3 that provides a burgundy color.
Claims12
A transparent glass-ceramic having a beta-quartz solid solution as its primary crystal phase, containing an amount of TiO.sub.2 effective as a nucleating agent up to about 6%, and having a color package composed of 50 to 150 ppm Co.sub.3 O.sub.4, 50 to 250 ppm NiO and 400 to 1000 ppm Fe.sub.2 O.sub.3, thereby providing a burgundy color.
An article of cookware composed of a transparent glass-ceramic having as its primary crystal phase a beta-quartz solid solution, containing an amount of TiO.sub.2 effective as a nucleating agent up to about 6%, and having a color package composed of 50-150 ppm Co.sub.3 O.sub.4, 50-250 ppm NiO and 400-1000 ppm Fe.sub.2 O.sub.3, thereby providing a burgundy color.
Dependencies are inferred from the claim text.