| abstract |
The composition according to the invention is based on zirconium oxide, cerium oxide and at least one oxide of a rare earth other than cerium, in a zirconium oxide mass proportion of at least 5% and cerium oxide of at most 90%, and it is characterized in that it further comprises silicon oxide in an amount by mass of between 0.1% and 2%. This composition can be used in catalysis, particularly in exhaust gas treatment systems of internal combustion engines. |