用溶胶-凝胶法制备了不同粒径的Yb2O3纳米晶。XRD分析表明：所合成的Yb2O3纳米晶属于立方晶系，空间群为Ia3。TEM分析表明：所合成的Yb2O3粒子基本呈球形。计算表明：Yb2O3的平均晶粒度随焙烧温度的升高而增大，而平均晶格畸变率随焙烧温度的升高和晶粒度的增大而减小，表明晶粒越小，晶格畸变越大，微晶发育越不完整。溶解性试验表明：Yb2O3晶粒度减小，表面活性增加。FTIR光谱分析表明：纳米Yb2O3比普通的Yb2O3具有更高的表面活性，Yb-O键的吸收强度减弱，有微小的蓝移。
Nanocrystalline Yb2O3 of various particle sizes was preparedusing sol-gel method. XRD analysis shows that the prepared nanocry stalline Yb2O3 is cubic in structure with space group Ia3. TEM photographs indicate that Yb2O3 nanoparticles are basically spherical in shape. Calculati on of crystallite size indicates that the average crystallite size of Yb2O3 increases with increasing calcination temperature, but the average crystal latt ice distortion rate decreases with increasing calcination temperature and crysta llite size. This reault shows that the smaller the crystallite size, the bigger the crystal lattice distortion, and the worse crystal growth. Solubility test of Yb2O3 in nitric acid shows that the surface activity of Yb2O3 increas es with decreasing crystallite size. Fourier Transform Infrared Spectrometer (FT IR) spectra reveal that nanocrystalline Yb2O3 has higher surface activity than that of ordinary Yb2O3. Absorbance intensity of Yb-O bond of nanocrystalline Yb2O3 is weaker than that of ordinary Yb2O3, and the absorbance of Yb-O bond of nanocrystalline Yb2O3 is small blue-shifted.
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