Glass-ceramics and color package

Details Glass-ceramics and color package Glass-ceramics and color package

1994-06-10

1995-06-06

Group, Karl

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 69, C03C 1014

Patent

active

054223180

ABSTRACT:
A colored, transparent glass-ceramic having a beta-quartz solid solution as its primary crystal phase, and a method of producing the glass-ceramic. The glass-ceramic is produced from a Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 precursor glass containing an amount of TiO.sub.2 effective as a nucleating agent up to about 6%, and having a color package composed of 10-20 ppm Co.sub.3 O.sub.4, 550-650 ppm Fe.sub.2 O.sub.3, 19.5-20.5% Al.sub.2 O.sub.3 and 2.5-3.0% Li.sub.2 O.

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