Ivory color in opaque glass-ceramic

Details Ivory color in opaque glass-ceramic Ivory color in opaque glass-ceramic

1994-11-14

1996-04-30

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 4, 501 64, 501 68, 501 69, C03C 1012, C03C 1014, C03C 3085

Patent

active

055125204

ABSTRACT:
An ivory-colored, opaque glass-ceramic having a beta-spodumene solid solution as its primary crystal phase, and a method of controlling color in 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 3-6% TiO.sub.2 +ZrO.sub.2 as a nucleating agent and having colorants controlled at levels of up to 20 ppm Co.sub.3 O.sub.4, up to 1000 ppm Fe.sub.2 O.sub.3 and 1000-2000 ppm CeO.sub.2.

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patent: 5256602 (1993-10-01), Danielson et al.
patent: 5422318 (1995-06-01), Hagg et al.

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