Colored glass-ceramic articles

Details Colored glass-ceramic articles Colored glass-ceramic articles

1994-05-02

1995-02-07

Group, Karl

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 57, 501 64, 501 69, 501 72, 106 35, C03C 1016

Patent

active

053875583

ABSTRACT:
This invention is directed to the formation of glass-ceramic articles which exhibit a yellow coloration in visible light and fluoresce with a yellow coloration while being exposed to ultraviolet radiation. The yellow coloration is produced through the incorporation of a color package comprising 0.05-0.5% V.sub.2 O.sub.5, 0.25-5% CeO.sub.2, and 0.1-1% Tb.sub.2 O.sub.3. When the glass-ceramic articles contain tetrasilicic fluormica as the predominant crystal phase, they are eminently suitable for use as dental prosthetic materials.

REFERENCES:
patent: 1292148 (1919-01-01), Taylor
patent: 3839055 (1974-10-01), Grossman
patent: 4170823 (1979-10-01), Smythe
patent: 4431420 (1984-02-01), Adair
patent: 4575805 (1986-03-01), Moermann et al.
patent: 4652312 (1987-03-01), Grossman et al.
patent: 4663720 (1987-05-01), Duret et al.
patent: 4664629 (1987-05-01), Chodkowski
W. A. Weyl in "Coloured Glasses", Dawson's of Pall Mall, London, England, 1959, pp. 213 and 233.

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