【摘要】 光限幅材料在激光轰击过程中的稳定性将在很大程度上决定其实用化价值。文章采用红外(IR)光谱、拉曼(Raman)光谱、透射电子显微镜(TEM)及孔结构分析等测试方法对纳米碳管(CNTs)复合光限幅材料在激光轰击过程中组成、结构的演变进行跟踪研究。结果表明,在强激光轰击下,复合体系中二氧化硅(SiO2)基质的组成未发生显著改变且网络结构趋于完整,具有较好的稳定性。掺杂CNTs石墨化程度提高,SiO2凝胶玻璃基质对其起一定的保护作用。轰击过程产生的热效应使得SiO2颗粒长大,由其堆积而成的孔随之增大。更多还原

【Abstract】 The composition and structure evolution of carbon nanotube（CNT）/silica xerogel composites during the process of（laser） irradiation was traced by infrared（IR） spectra,Raman spectra,transmission electronic microscope（TEM） and pore structure analysis.The results of IR and Raman spectra show that during the process of laser irradiation the compositions of the composites do not make any noteworthy changes,while the matrix silica network becomes perfect and the doped CNTs become more graphitized.TEM images and pore structure analysis show that the SiO₂ granules and the corresponding pore size increase after laser irradiation.更多还原