Method of producing tantalum (V) nitride

Details Method of producing tantalum (V) nitride Method of producing tantalum (V) nitride

1993-10-14

1994-12-27

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

423592, C01B 2106

Patent

active

053763491

ABSTRACT:
An improved method for producing tantalum (V) nitride by means of nitriding an oxidic tantalum (V) compound is described. The Ta.sub.3 N.sub.5 product obtained in accordance with this method may be used as a red coloring pigment, particularly for coloring plastics and varnishes. An improved color intensity can be achieved and/or the reaction time can be shortened using the process in accordance with the invention. The process includes nitriding tantalum (V) hydrated oxide with the composition of the formula Ta.sub.2 O.sub.5 .multidot.aq with a hydrate content (i.e., aq content) in a range of 14 to 17% by weight. The nitridation preferably takes place in the presence of a fluxing agent such as ammonium carbonate or boric acid.

REFERENCES:
patent: 2461020 (1949-02-01), Alexander
patent: 4975260 (1990-12-01), Imai et al.
G. Brauer and J. R. Weidlein, "Synthesis and Properties of Red Tantalum Nitride Ta.sub.3 N.sub.5 ", Angew. Chem. Internat. Edit./vol. 4 (1965), No. 3, pp. 241, 242.
H. Funk and H. Boehland "Zur Darstellung von Metallnitride aus Ammoniumfluoromethallaten und Ammoniak," Z. Anorg. Allg. Chem. 334, pp. 155-162 (1964).
Brauer and Weidlein, "Synthese und Eigenschaften des roten Tanatalnitrids Ta.sub.3 N.sub.5 ", Angew. Chem., 77, 218 (1965).
Moureu and Hamblet, J. Amer. Chem. Soc., vol. 59, Jan. 1937, pp. 33-40.

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