TITANIUM-BASED MATERIAL RESPONSIVE TO VISIBLE LIGHT AND HAVING EXCELLENT PHOTOCATALYTIC ACTIVITY, AND PROCESS FOR PRODUCING SAME

Provided are beautiful chromatic titanium in which adhesion to the base constituted of pure titanium and a titanium alloy is satisfactory and which has excellent photocatalytic activity and a highly attractive appearance and a process for producing same using an anodizing process with excellent prod...

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Bibliographische Detailangaben
Hauptverfasser:	KANEKO, MICHIO, SHIMIZU, HIROSHI, TOKUNO, KIYONORI, YAMAGISHI, KAZUO, YOKOYAMA, RURIKO, SHIMOMURA, ASAMI, HASEGAWA, MITUYUKI
Format:	Patent
Sprache:	eng ; fre ; jpn
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Provided are beautiful chromatic titanium in which adhesion to the base constituted of pure titanium and a titanium alloy is satisfactory and which has excellent photocatalytic activity and a highly attractive appearance and a process for producing same using an anodizing process with excellent productivity. The chromatic titanium is a titanium-based material which is responsive to visible light and has excellent photocatalytic activity, and which comprises a base, the base being constituted of pure titanium and a titanium alloy, and a titanium oxide layer present on the surface of the base, the titanium oxide layer having a thickness in the range of 0.1-5.0 µm, comprising anatase titanium dioxide and hydroxy-bonded titanium, and containing nitrogen and carbon in an amount of 0.5-30 mass% each. The process for producing the titanium-based material comprises anodizing in an aqueous alkali solution containing nitrate ions in a concentration of from 0.01 M to saturation. L'objectif de l'invention est d'obtenir: un beau titane coloré qui présente une bonne adhérence avec un titane pur / alliage de titane d'un substrat, et dont l'activité photocatalytique ainsi que la qualité esthétique sont excellentes; ainsi qu'un procédé de fabrication de celui-ci mettant en oeuvre un processus d'oxydation anodique d'une excellente productivité. Le matériau à base de titane doté d'une sensibilité à la lumière visible et d'une excellente activité photocatalytique comprend une couche d'oxyde de titane située à la surface du substrat constitué de titane pur et d'alliage de titane. L'épaisseur de ladite couche d'oxyde de titane est comprise entre 0,1 µm et 5,0 µm. Ladite couche d'oxyde de titane contient un titane associé avec un groupe hydroxyde et un dioxyde de titane anatase. Cette couche d'oxyde de titane comprend de l'azote et du carbone à raison chacun de 0,5 à 30% en poids. Le procédé de fabrication du matériau à base de titane est constitué d'un traitement d'oxydation anodique dans une solution aqueuse alcaline contenant des ions nitrates d'une concentration saturée d'au moins 0,01 M.