| 摘要 |
<p>Composition in the form of a solid-solid solution which is phase stable at 1150°C /36 hours and at 1200° / 4 hours, the composition comprising oxides of zirconium and cerium wherein the oxide of zirconium is enriched, an oxide of erbium, gadolinium, dysprosium, or yttrium as a stabilizer in an amount of 10% to 30% by weight, and optionally one ore more dopant, a composition in the form of a solid-solid solution comprising oxides of zirconium and cerium wherein the oxide of zirconium is enriched, an oxide of erbium or oxide of dysprosium as a stabilizer in an amount of 10% to 30% by weight and optionally one ore more dopant, the use of such compositions in a system for exhaust gas after treatment and a process which is appropriate for the preparation of such compositions.</p> |
