CoO Free black spinel ceramic pigment containing NiO, Fe.sub.2 O

Details CoO Free black spinel ceramic pigment containing NiO, Fe.sub.2 O CoO Free black spinel ceramic pigment containing NiO, Fe.sub.2 O

1979-04-26

1980-06-03

Vertiz, O. R.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106304, C09C 124, C09C 134, C09C 140

Patent

active

042059968

ABSTRACT:
Although free of CoO, the present spinel ceramic pigments have intensity of black coloration comparable to those using cobalt; they are nickel-rich, selected compositions in the NiO-MnO-CuO-Fe.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -Mn.sub.2 O.sub.3 -V.sub.2 O.sub.3 -Al.sub.2 O.sub.3 system, and they can be used with glaze frits containing up to about 10% ZnO.

REFERENCES:
patent: 2309173 (1943-01-01), Diehl
patent: 2811463 (1957-10-01), Burgyan
patent: 3528839 (1970-09-01), Weber
patent: 3561989 (1971-02-01), Weber
patent: 4075029 (1978-02-01), Nuss
"Classification and Chemical Descriptions of Mixed Metal Oxide Inorganic Colored Pigments", The Dry Color Manufacturer's Association, Arlington, Va., pp. 7 & 18.

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