Tantalum(v) nitride pigments

Details Tantalum(v) nitride pigments Tantalum(v) nitride pigments

C - Chemistry, Metallurgy

01

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C01G 35/00 (2006.01) C01B 21/06 (2006.01) C03C 4/02 (2006.01) C03C 8/14 (2006.01) C08J 3/20 (2006.01) C08K 3/28 (2006.01) C08K 9/02 (2006.01) C09C 1/00 (2006.01) C09D 7/12 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2299181

Tantalum(V) oxide may be nitrided with ammonia at 700 to 1250°C to yield tantalum(V) nitride. According to the invention, nitriding and consequently pigment quality are improved by adding at least one pulverulent oxide selected from the group consisting of SiO2, GeO2, SnO2, TiO2, ZrO2 and HfO2 or a pulverulent precursor of such an oxide in a quantity of at least 0.1 wt.%, calculated as oxide, to the tantalum(V) oxide to be nitrided and then nitriding the powder mixture.

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