Coated spinel color pigments, process for their production and u

Details Coated spinel color pigments, process for their production and u Coated spinel color pigments, process for their production and u

1991-05-09

1993-03-16

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106431, 106434, 106437, 106439, 106440, 106453, 106454, 106456, 106457, 106459, 106461, 106480, 106481, 106483, 428404, 501 17, 501 18, C09C 306

Patent

active

051940892

ABSTRACT:
Coated spinel color pigments with a core of a colored spinel, in particular CoAl.sub.2 O.sub.4, and a coating glassy layer of a silicate are described. The coating layer is essentially silicon dioxide and one or more oxides of the group of alkali metals, alkaline earth metals, and/or earth metals show a high resistance to bleeding in the presence of glass fluxes, as compared to uncoated spinels. The pigments are produced by sintering, for 0.5 to 5 hours, a powder mixture of the spinel, silicon dioxide, and at least one member chosen from the group of alkali metal halides, alkaline earth metal halides, earth metal halides and mixtures thereof as mineralizer at 900.degree. to 1,300.degree. C. The coated spinel color pigments are suitable for the production of ceramic decorations with improved contour sharpness.

REFERENCES:
patent: 3956005 (1976-05-01), Sugahara et al.
patent: 4696700 (1987-09-01), Fischer et al.
patent: 5019169 (1991-05-01), Speer et al.
World Patent Index, Wk 16, 1987, Derwent Publications, Ltd. AN 87-1140, Mar. 10, 1987.
World Patent Index, 1986, Derwent Publications, Ltd., AN 86-244531/37, Feb. 1986.
Eppler, Richard A., "Selecting Ceramic Pigments," American Ceramic Society Bulletin, vol. 66, No. 11, 1987, pp. 1600-1604.
Pishch, I. V., et al., "Effects of Mineralizers on the Physiochemical Properties of Pigments," Glass & Ceramics, vol. 44, Nos. 3-4, 1987, 174-76.

Affiliated with

Also associated with

Rating

Coated spinel color pigments, process for their production and u does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coated spinel color pigments, process for their production and u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coated spinel color pigments, process for their production and u will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-349297