Nanosized Ag-doped ceria (Ce_1-xAl_xO_2-δ)powders (0.1 ≤ x ≤ 0.04) were obtained by self-propagating room temperature reaction. The solid solubility of Ag into ceria lattice was the highest reported so far. X-ray diffraction analysis and field emission scanning microscopy results showed that the doped samples are single phase solid solutions with fluorite-type structure and all prepared powders were nanometric in size. The average size of Ce1-xAgxO2-▯ particles lies at about 4 nm. Raman spectra revealed an increase in the amount of oxygen vacancies with the increase of Ag concentration, such as is foreseen. The thermal stability of solid solution was followed by XRD. Microstructure development was studied by scanning electron microscopy. By controlling the processing variables, it was possible to obtain high density samples with homogeneous microstructure at low sintering temperature.

纳米Ag掺杂二氧化铈（Ce _1-x Al _x O2 _-δ通过自蔓延室温反应获得粉末（0.1≤x≤0.04）。迄今为止，Ag在二氧化铈晶格中的固溶度最高。X射线衍射分析和场发射扫描显微镜结果表明，掺杂样品为具有萤石型结构的单相固溶体，所有制备的粉末均为纳米级。Ce1-xAgxO2-▯颗粒的平均尺寸约为4 nm。拉曼光谱表明，氧空位的数量随Ag浓度的增加而增加，这是可以预见的。固溶体的热稳定性通过XRD来跟踪。通过扫描电子显微镜研究了微结构的发展。通过控制工艺变量，可以在低烧结温度下获得具有均匀微观结构的高密度样品。