用水热法制得了在室温大气环境下稳定的半导体 SnO_2纳米材料。用 X 射线粉晶衍射、透射电镜、高分辨电镜及 M(?)ssbauer 谱等研究了不同压力下的纳米 SnO_2的特性。随着压力增加,所有谱线都有明显展宽,其特性明显区别于一般的多晶 SnO_2。用残缺态的概念解释了实验结果。 Hydrothermal method was used to prepare a stable semiconductor SnO 2 nanomaterial at room temperature in the atmosphere. The properties of nano-sized SnO 2 under different pressures were investigated by X-ray powder diffraction, transmission electron microscopy, high resolution electron microscopy and M (?) Ssbauer spectroscopy. As the pressure increases, all the lines have a significant broadening, their characteristics are clearly different from the general polycrystalline SnO_2. The concept of incomplete state explained the experimental results.