低温燃烧法制备纳米Ce_(1-x)Nd_xO_(2-x/2)(0≤x≤0.6)粉体的研究  

Synthesis of Nanocrystalline Ce_(1-x)Nd_xO_(2-x/2) (0≤x≤0.6) Powders byLow-temperature Combustion Synthesis

作　　者：高勇[1] 王玲玲[1] 刘晃清[1] 

机构地区：[1]湖南大学应用物理系,湖南长沙410082

出　　处：《中国稀土学报》2005年第2期171-174,共4页Journal of the Chinese Society of Rare Earths

基　　金：湖南省自然科学基金重点项目(04JJ20007)

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。The synthesis of nanocrystalline Ce_(1-x)Nd_xO_(2-x/2)(0≤x≤0.6)solid solution powders by a nitrate-glycine gel-combustion process was investigated. XRD patterns indicate that Nd^(3+) is dissolved into Ce^(4+) 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.

关 键 词：低温燃烧法 CEO2 ND2O3 甘氨酸 稀土 

分 类 号：TF123[冶金工程—粉末冶金]