Manufacturing of photocatalytic, antibacterial, selfcleaning...

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 41/87 (2006.01)

Patent

CA 2542520

The principle of the deposition technique uses ultrafine crystals of ceramic oxides deposited relatively cold on melted or partially melted surfaces of ceramic tiles and other glazed ceramics, creating a spotty deposition without a significant change of optical properties of the surface. Because the desired nano-substance is deposited cold in a solid state form on the hot "sticky" surfaces and rapidly cooled down, deposited material is directly melted into the substrate surface, but its outer side remains unchanged. It allows creating a deposition with the desired parameters, for amplifying and extending the antibacterial protection in the dark, these surfaces may contain noble and heavy metals, deposited either dry as a part of the powder, or in a separate step, directly on the surface by wet depostion followed by drying and calcination.

Le principe de la technique de dépôt consiste à mettre en oeuvre des cristaux ultrafins d'oxydes céramiques déposés relativement froids sur des surfaces fondues ou partiellement fondues de carreaux de céramique ou autres produits céramiques émaillés pour former un dépôt dispersé, sans modification sensible des propriétés optiques de la surface. La nanosubstance désirée étant déposée à froid, à l'état solide, sur les surfaces chaudes "collantes", puis refroidie rapidement, le matériau déposé fond directement dans la surface du substrat, mais sa face extérieure demeure inchangée. Un dépôt peut ainsi être créé, qui présente les paramètres désirés pour amplifier et renforcer la protection antibactérienne dans la pénombre. Ces surfaces peuvent contenir des métaux nobles et des métaux lourds déposés soit à l'état sec comme partie de la poudre, soit directement sur la surface, dans une étape distincte, par dépôt en phase humide suivi de séchage et de calcination.

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