Inclusion pigments of zirconium silicate with included chromic o

Details Inclusion pigments of zirconium silicate with included chromic o Inclusion pigments of zirconium silicate with included chromic o

1992-03-12

1994-07-19

Klemarski, Helene

Compositions: coating or plastic

Materials or ingredients

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

106400, 106453, 106454, 106481, 427215, G08K 300

Patent

active

053305710

ABSTRACT:
Inclusion pigments are discolored having zirconium silicate as a casing component and chromium (III) oxide (Cr.sub.2 O.sub.3) as a discrete, included color compound. The included Cr.sub.2 O.sub.3 has a D.sub.50 value in the range of 0.1 to 3.0 .mu.m and a brilliant light green color. Contrary to non-included Cr.sub.2 O.sub.3 of identical value, the pigments of the present invention may be used for the preparation of decorations without problems and difficulties in their application and maintaining sharp lines and contours. The pigments are suitable for direct pressing and high temperature firing processes. They are prepared by fusing a mixture of zirconium dioxide, silicon dioxide, mineralizators and chromium oxide.

REFERENCES:
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patent: 4874433 (1989-10-01), Kiss et al.
patent: 5008223 (1991-04-01), Speer et al.
patent: 5019169 (1991-05-01), Speer et al.
patent: 5021092 (1991-06-01), Speer et al.
patent: 5035746 (1991-07-01), Speer et al.
patent: 5043016 (1991-08-01), Speer et al.
Van Arno Broll et al., Chaniker Zeitung, vol. 101, Jul./Aug. 1977, pp. 319-323.
Transactions of British Ceramic Society, Bd. 8, No. 5 (2298/69) dated Sep. 1969.
Chemical Abstracts, vol. 94, No. 20, dated May 18, 1981, No. 94:161346y.

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