Ceramic powders coated with a nanoparticle layer and process...

Details Ceramic powders coated with a nanoparticle layer and process... Ceramic powders coated with a nanoparticle layer and process...

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C04B 41/85 (2006.01) C09C 1/40 (2006.01) C09C 3/06 (2006.01)

Patent

CA 2739991

The present invention refers to ceramic powders coated with a layer of nanoparticles of multiple crystalline structures and process for obtaining the same. These coatings are obtained by means of the introduction of precursors in water in oil emulsions, which upon decomposition during its detonation, form the nanoparticles that adhere to the surface of the ceramic powder intended to coat. The later base ceramic powder can be synthesized during the emulsion detonation (W/0) or simply be directly placed in its composition. The properties of the obtained coating, such as thickness, adhesion, porosity and coated surface percentage, can be adjusted according to the application desired, the ceramic powders coated being applicable to several types of areas of the nanotechnology, such as electronics, biomedicine, chemistry, ceramics and energy industries.

Cette invention concerne des poudres de céramique comportant une couche de nanoparticules à structures cristallines multiples et leur procédé de fabrication. Ces couches sobtiennent par introduction de précurseurs dans des émulsions eau dans huile (E/H) qui, lors de a décomposition liée à la détonation, forment des nanoparticules qui vont adhérer sur la surface de la poudre céramique quelles doivent revêtir. Cette poudre céramique de base peut être synthétisée pendant la détonation de lémulsion E/H ou être introduite directement dans la composition. Les caractéristiques de la couche obtenue épaisseur, force dadhérence, porosité ou pourcentage de surface recouverte peuvent être ajustées en fonction de lapplication, les poudres céramiques appliquées concernant plusieurs domaines des nanotechnologies : électronique, biomédecine, céramiques, industries de lénergie notamment.

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