Item in slab form made from stone agglomerate coated with...

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 41/50 (2006.01) C04B 41/51 (2006.01) C23C 16/40 (2006.01)

Patent

CA 2731327

Article in the form of a slab or flag fabricated from stone agglomerate coated with thin, transparent films of TiO2 or ZnO, using dry deposition techniques, with a high level of resistance to solar degradation, said article having the form of a slab or flag fabricated from stone agglomerate coated with a thin, transparent film of TiO2 and/or ZnO with low or zero photocatalytic activity, said film being deposited by means of dry deposition, physical vapour deposition (PVD) or plasma enhanced chemical vapour deposition (PECVD) techniques. Said article has a high level of resistance to solar degradation, which means that the resulting material is suitable for external environments.

L'invention porte sur un article en forme de plaque ou de dalle, fabriqué dans un matériau pierreux aggloméré que l'on recouvre de minces couches transparentes de TiO2 ou de ZnO selon des techniques de dépôt par voie sèche, lequel article possède une résistance élevée à la dégradation solaire. La plaque ou dalle en matériau pierreux aggloméré précitée est recouverte d'une mince couche transparente de TiO2 et/ou de ZnO à activité photovoltaïque faible ou nulle, formée selon des techniques de dépôt par voie sèche, du type dépôt physique en phase vapeur ou PVD (physical vapor deposition) ou dépôt chimique en phase vapeur assisté par plasma ou PECVD (Plasma Enhanced Chemical Vapor Deposition). L'article selon l'invention possède une résistance élevée à la dégradation solaire, ce qui en fait un matériau adapté aux environnements extérieurs.

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