【摘要】 采用低温燃烧合成工艺,在甘氨酸硝酸盐体系下制备出纳米Ce1-xNdxO2-x 2(0≤x≤0.6)系列粉体(NDC)。X射线衍射(XRD)结果表明,Nd3+取代Ce4+进入晶格内部,形成具有单相立方萤石型结构的固溶体,其晶格常数随Nd3+掺杂浓度的增大而线性增加,晶粒尺寸在17～28nm之间。透射电镜(TEM)结果表明,粉体尺寸在30～40nm之间,具有较高的烧结活性。拉曼光谱(RamanSpectrum)表明F2g宽化峰与掺杂后固溶体中产生的氧空位有关。更多还原

【Abstract】 The synthesis of nanocrystalline Ce_1-xNd_xO_2-x/2（0≤x≤0.6）solid solution powders by a nitrate-glycine gel-combustion process was investigated. XRD patterns indicate that Nd³⁺ is dissolved into Ce⁴⁺ crystal lattice and the powders are fluorite cubic structure. The lattice constant enhances with the increase of the doped concentration x. The crystalline size of powders is approximately 17～28 nm. TEM micrograph shows that the particles size is 30～40 nm, with high sintering activity. The broaden of Raman peak at 580 cm^-1 is attributed to the presence of oxygen vacancies.更多还原