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COMPOSITION BASED ON ZIRCONIUM OXIDE, TITANIUM OXIDE OR MIXED ZIRCONIUM AND TITANIUM OXIDES SUPPLIED ON SILICON OXIDE CARRIER, METHODS FOR PRODUCING IT AND ITS APPLICATION AS A CARE
COMPOSITION BASED ON ZIRCONIUM OXIDE, TITANIUM OXIDE OR MIXED ZIRCONIUM AND TITANIUM OXIDES SUPPLIED ON SILICON OXIDE CARRIER, METHODS FOR PRODUCING IT AND ITS APPLICATION AS A CARE
1. Composition containing at least one oxide on a carrier, consisting of zirconium oxide, titanium oxide or mixed oxide of zirconium and titanium, supported on a carrier based on silicon oxide, characterized in that after firing at 900 ° C for 4 hours the oxide on a support has the form of particles supported on said support, the size of which is: not more than 5 nm, if the oxide on the support is obtained on the basis of zirconium oxide; not more than 10 nm, if the oxide on the support is obtained on the basis of titanium oxide; not more than 8 nm, if the supported oxide is a mixed oxide of zirconium and titanium. 2. A composition containing at least one oxide on a support, consisting of zirconium oxide, titanium oxide or mixed oxide of zirconium and titanium, supported on a support based on silicon oxide, characterized in that after firing at 1000 ° C for 4 hours, the oxide on the support has the form of particles deposited on said carrier, the size of which is: not more than 7 nm, if the supported oxide is obtained on the basis of zirconium oxide; not more than 19 nm, if the supported oxide is obtained on the basis of titanium oxide; not more than 10 nm, if the oxide on a support obtained on the basis of mixed oxide of zirconium and titanium. 3. Composition according to claim 1 or 2, characterized in that the proportion of the supported oxide in it is not more than 50 wt%, more preferably not more than 30 wt%. A composition according to claim 1 or 2, characterized in that the supported oxide consists of zirconium oxide and at least one oxide of another element M selected from praseodymium, lanthanum, neodymium and yttrium. The composition according to claim 3, characterized in that the supported oxide consists of zirconium oxide and at least one oxide of another element.
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