沉淀剂对稀土助剂性能的影响

his experiment using co precipitation method in six different precipitatingagent preparation of ceria zirconium lanthanum yttrium oxygen storagematerials, and has carried on the test and analysis of XRD, BET, OSC. The results show that oxygen storage materials with different precipitating agentprepared, are cubic phase solid solution structure, aging has no phaseseparation; with the mixture of ammonia, ammonium sulfate and ammonium hydrogen carbonate as precipitating agent for oxygen storage materialprepared has the largest surface area, the fresher than surface areareaches 120.63m2/g, aging of specific surface area is still 42.21m2/g; freshoxygen storage capacity is 530.77 mol/g, after aging oxygen storage capacity is still 422.47 mol/g.