以钨粉和正硅酸乙酯为原料 ,采用溶胶凝胶技术和旋转镀膜方法 ,在玻璃衬底上制备出了气致变色WO3 SiO2 纳米复合薄膜 .采用椭偏仪、场发射扫描电子显微镜 (FE SEM )、红外光谱仪以及可见光分光光度计等对不同温度热处理的WO3 SiO2 复合薄膜及WO3 薄膜的特性进行了分析 .研究结果表明 :掺杂SiO2 会使WO3 薄膜厚度增大 ,折射率下降 ,表面平整度降低 ,颗粒尺寸增大 ;经高温热处理的WO3 SiO2 复合薄膜具有良好的气致变色能力 The gasochromic WO3 SiO2 nanocomposite films were prepared on glass substrates by sol-gel technique and spin-coating method using tungsten powder and tetraethylorthosilicate as raw materials. Ellipsometry, field emission scanning electron microscopy (FE) SEM, infrared spectroscopy and visible spectrophotometer were used to analyze the properties of WO3 SiO2 composite films and WO3 films heat-treated at different temperatures.The results show that the thickness of WO3 films increases, the refractive index decreases and the surface roughness Degree of reduction, particle size increases; high temperature heat treatment of WO3 SiO2 composite film has good gasochromism