Precursor(SnC2O4)was prepared by ball-milling solid chemical reaction between oxalic acid and stannous chloride at ambient temperature,and SnO2 was obtained by thermal decomposition of the precursor.The x-ray diffraction was used to analyze the phase of the precursor and decomposition products,TG-DTA was used to analyze the change of the precursor in the process of pyrogenation,and SEM was used to analyze the shape of the decomposition products.Then the mechanism of ball-milling solid reaction between oxalic acid and stannous chloride was discussed,and the effect of temperature on the decomposing process was studied.The results show that the decomposition products vary in component and size according to different decomposition temperature.Spherical nano-SnO2 about 100nm is obtained by decomposition of the precursor at 600℃.
