| 简介 |
The invention relates to a composition containing zirconium, titanium and tungsten oxides, and optionally the oxide of an element M selected from silicon, aluminium, iron, molybdenum, manganese, zinc, tin, and rare earths in the following mass proportions of said different elements : titanium oxide : 20%%-50%%; tungsten oxide : 1%%-20%%, M-element oxide : 1%%-20%%; the balance consisting of zirconium oxide. The composition is obtained by : placing in a liquid medium a zirconium compound, a titanium compound, optionally an M-element compound and a basic compound; adding a tungsten compound to the precipitate suspension thus obtained and having a pH value of between 1 and 7; maturing the suspension resulting from the preceding step; and optionally separating the precipitate and calcining it.© KIPO & WIPO 2009 |
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