Powder having multilayer film on its surface and process for...

C - Chemistry – Metallurgy – 09 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C09C 3/08 (2006.01) B22F 1/02 (2006.01) C03C 17/34 (2006.01) C09C 1/00 (2006.01) C09C 3/06 (2006.01) C09D 5/36 (2006.01) G03G 9/083 (2006.01) H01F 1/06 (2006.01) H01F 1/24 (2006.01)

Patent

CA 2215402

The refractive index of a metal oxide film on the surface of a powder is enhanced to give a high-reflectance, vividly colored powder, and the number of the layers constituting the metal oxide film is reduced to give a powder having a small particle diameter. The powder comprises a base powder and a multilayer film that has at least a metal oxide film formed by the hydrolysis of a metal alkoxide and that has been heat-treated. The process for preparing the above powder comprises the steps of: dispersing a base powder in a metal alkoxide solution; hydrolyzing the metal alkoxide to prepare a metal oxide, thereby forming a metal oxide film on the surface of the base powder; repeating the above steps a plurality of times to form a multilayer film; conducting heat treatment at least in the final step; and regulating a combination of the substances constituting the multilayer film and the film thickness to change the interference color of the multilayer film, thereby imparting a vivid color to the powder.

le procédé proposé permet d'augmenter l'indice de réfraction de la surface d'une poudre à pellicule d'oxyde métallique, d'obtenir ainsi une valeur de réflectance élevée et une coloration vive, de réduire le nombre de couches constitutives de la pellicule d'oxyde métallique et d'avoir ainsi des particules de petit diamètre. La poudre se compose d'une poudre de base et d'une pellicule multicouche comprenant au moins une pellicule d'oxyde métallique obtenue par hydrolyse d'un alkoxyde métallique et traitée à chaud. Le procédé de préparation de la poudre en question comporte les étapes suivantes: dispersion d'une poudre de base dans une solution d'alkoxyde métallique hydrolyse de l'alcoxyde métallique pour obtenir un oxyde métallique, de sorte qu'une pellicule d'oxyde métallique se forme à la surface de la poudre de base; répétitions multiples des étapes susmentionnées; traitement à chaud au moins au cours de la dernière étape; dosage de la combinaison de substances constitutives de la pellicule multicouche et réglage de l'épaisseur de la pellicule pour modifier la teinte de polarisation de la pellicule multicouche, ce qui confère à la poudre une coloration vive.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Powder having multilayer film on its surface and process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Powder having multilayer film on its surface and process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Powder having multilayer film on its surface and process for... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1442897

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.