低温燃烧法合成Ce1-xNdxO2-x/2（0≤x≤0．6）纳米粉体  

Synthesis Nanocrystalline Ce1-xNdxO2-x/2（0≤x≤0.6） Powers by Low-temperature Combustion

作　　者：李鹏飞 高勇[2] 

机构地区：[1]湖南株冶有色金属有限责任公司新材料事业部,湖南株洲412007 [2]湖南大学应用物理系,湖南长沙410082

出　　处：《纳米科技》2005年第6期39-42,共4页

摘　　要：采用低温燃烧合成法，在柠檬酸-硝酸盐体系中合成出Ce1-xNdxO2-x/2（0≤x≤0．6）固溶体纳米粉体。X射线衍射（XRD）结果表明，Nd^3＋取代Ce^4＋进入晶格内部，形成具有单相立方萤石结构的固溶体，其晶格常数随Nd^3＋掺杂浓度的增大而线性增加，晶粒尺寸在15-24nm之间。透射电镜（TEM）结果表明，粉体颗粒尺寸在20-40nm之间，分散性较好，具有较高的烧结活性。拉曼光谱（Raman Spectrum）结果表明，F2g宽化峰的出现与掺杂后固溶体中产生的氧空位有关，并且随着掺杂浓度的增加，氧空位数量也再增加。By low-temperature combustion synthesis, nanocrystalline Ce1-xNdxO2-x/2（0≤x≤0.6） solid-solution powers were synthesized in the system of citric acid-nitrate, The result of X-ray diffraction （XRD） showed that Nd^3＋ in place of Ce^4＋ entered the interior of lattic and became single-phase solid-solution with the structure of cube fluerite, the lattice constant increased linearly with raising of the doping consistency of Nd^3＋, and the size of crystal partical was between 15nm to 24nm. The result of TEM showed that the size of crystal partical was between 20nm to 4Ohm, and the powers had better dispersion and higher sintering activity. Roman spectrom showed that the appearance of F2g broad hump related to the oxygen vacancies which was producted in the solid-solution after doping, and the oxygen vacancies added with the raising of doping consistency.

关 键 词：低温燃烧法 CEO2 ND2O3 柠檬酸 

分 类 号：TB34[一般工业技术—材料科学与工程]