Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness

Details Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness

1995-09-27

1997-12-02

Langel, Wayne

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

106401, 423263, C01F 1700, D06P 500, C04B 1400

Patent

active

056931026

ABSTRACT:
Oxonitrides with a perovskite of the general formula LnTaOn.sub.2, where Ln is a rare-earth element, and which exhibit an enhanced brightness, are produced by annealing a powder mixture consisting of a Ta (V) compound and a Ln compound in a reducing atmosphere that contains ammonia. Added to the powder mixture being annealed is a mineralizing agent from the series of alkali metal or alkaline earth halides, Na.sub.3 AlF.sub.6, Na.sub.2 SiF.sub.6, AlF.sub.3 or of the ammonia salts of carbonic acid or a mono- or dicarboxylic acid with 1 to 4 C atoms in a quantity of 0.1 to 10 parts by weight, relative to 1 part by weight of the mixture of the Ta and Ln compounds. Such oxonitrides can be used as pigments that are yellow-orange to reddish brown in color.

REFERENCES:
patent: 4734390 (1988-03-01), Marchand et al.
patent: 5376349 (1994-12-01), Jansen et al.
patent: 5439660 (1995-08-01), Jansen et al.

Affiliated with

Also associated with

Rating

Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-797683