中文摘要：

迄今为止，国际普遍使用的储氧材料主要是以具萤石四方结构CeO2-δ-ZrO2为基体掺杂Y2O3的固溶氧化物。为进一步提高储氧材料的储氧、催化、高温稳定性和抗老化性能，本研究采用“超声膜扩散”法制备了（LnO2-δ）x-（ZrO2）1-x（Ln=Ce，Pr，Tb）储氧材料。通过热重（TG）、微分扫描热分析（DSC）和XRD对其固溶过程和结构特征进行了研究。结果表明，（PrO2-δ）x-（ZrO2）1-x和（TbO2-δ），-（ZrO2）1-x显示出具有（CeO2-δ）x-（ZrO2）1-x同样晶体结构，较后者更稳定的固溶体组织，为进行储氧催化等性能的研究提供了基础。

英文摘要：

Fluorite- type structured CeO2-δ - ZrO2 solid solutions doped with Y2O3 have been as far used as the world - wide principal oxygen storage materials （OSM） in the three way catalysis （TWC）. To improve the oxygen storage capacity, catalytic activity and thermal stability, OSM （LnO2-δ）x - （ZrO2）1-x （ Ln = Ce, Pr, Tb） were synthesized using a novel method ＂ultrasound - assisted osmosis - diffusion chemical synthesis＂. The solid solution process and crystallization of the OSM were analyzed by thermal gravimetry （TG） ,differential scanning calorimetry （DSC） and XRD. The OSM （PrO2-δ）x - （ZrO2）1-x and （TbO2-δ）x - （ZrO2）1-x have been identified as solid solutions more stable than CeO2-δ - ZrO2 and all of them have the fluorite - type crystal structure.