中文摘要：

介绍了以氢气和空气的混合气体为爆炸源,在爆轰管内置铁片,同时以四氯化硅为前驱体,制备纳米SiO2-Fe2O3复合氧化物粉末的气相爆轰合成方法;并探究了不同煅烧温度对SiO2-Fe2O3复合纳米氧化物的影响。利用XRD、XRF及TEM对其组成、结构和形貌进行了分析和表征。结果表明：采用气相爆轰法可以制备出纯度高、分散性较好、颗粒形状为标准球形、平均粒径约50 nm、呈典型的层包覆式结构的纳米SiO2-Fe2O3复合氧化物。并且发现随着煅烧温度的增加,纳米复合氧化物粉末分散性变好,晶粒尺寸变得更均匀。

英文摘要：

A gaseous detonation synthesis method of preparing SiO2-Fe2O3 nanometer composite oxide powder have been proposed,which include the explosion source of hydrogen-air mixture gas and the precursor of Silicon Tetrachloride solution in a detonation tube with buit-in iron,and the influence of the calcination temperature on SiO2-Fe2O3 composite nanometer oxide have also been investigated.The composition,structure and morphology characterizations of the detonation product have been tested and analyzed by X-ray diffraction（XRD）,X-ray fluorescence（XRF） and transmission electron microscope（TEM）.Results show that the nanometer SiO2-Fe2O3 composite oxides with high purity,good dispersion,standard spherical particles can be prepared by gas phase detonation method.These nano-particles have the average particle size of about 50 nm and typical layer cladding structure.In addition,it＇ also found that as the increase of calcination temperature,the dispersion of SiO2-Fe2O3 nanometer oxide powder will be improved and the grain size will become more uniform.