【摘要】 以YCl3.6H2O和Na2C2O4为反应物,固相法制备氧化钇纳米粉体前驱体,用差热-热重法分析前驱体的分解过程,用X射线衍射和透射电镜对产物的组成、粒度和形貌进行表征。结果表明,产物为粒度分布均匀、纯度高、立方晶系的氧化钇,其一次颗粒尺寸在15nm左右。体系ζ电位和吸光度的测定表明,介质pH和表面活性剂类型和浓度对氧化钇粉体的悬浮稳定性有显著的影响。在阴/非离子表面活性剂复配物的水溶液中,pH在10左右,氧化钇粉体悬浮液稳定性最好。更多还原

【Abstract】 Yttria precursor powder is synthesized by solid state reaction of YCl3·6H2O with Na2C2O4.The decomposition process and mechanism of precursor are analyzed by mean of TG-DTA,the composition,particle size and morphology of the product are characterized by X-ray diffraction and transmission electron microscopy.The results show that the product is nanometer Y2O3 powder with cubic crystal,spherical shape and high purity,the mean diameter is about 15nm.It is indicated by ζ electric potential and luminosity absorbency of the system that the effect of the medium pH and the type and concentration of the surfactants on the suspending stability of the Yttria powder is obvious,the optimal suspending stability of the Yttria powder is achieved in the complex aqueous solution of anion/non-ion surfactants at pH about 10.更多还原