| abstract |
The composition of the invention is based on oxides of zirconium, titanium and tungsten and optionally of an element M selected from silicon, aluminum, iron, molybdenum, manganese and rare earths in the proportions following in mass in these various elements: titanium oxide: 20% -50%, tungsten oxide: 1% -20%, oxide of the element M: 1% -20%, the balance in zirconium oxide. This composition is obtained by bringing together in a liquid medium compounds of zirconium, titanium, optionally element M and a basic compound; adding a tungsten compound to the suspension of the precipitate thus obtained and whose pH value is adjusted between 1 and 7; by maturing the suspension from the previous step; optionally separating the precipitate and calcining it. |