论文部分内容阅读
以碳纳米管与液态Fe(CO)5的混合物为催化剂前躯体,加热分解制备出不同Fe/C比的碳纳米管负载铁氧体粒子,并以此为催化剂,采用甲烷催化裂解制备出Fe@C/CNT纳米复合粉体。利用XRD,FESEM和TEM对复合粉体的物相和形貌进行分析,结果表明:纳米复合粉体主要是由碳包覆Fe粒子(Fe@C)和碳纳米管组成,其中Fe@C的直径在10~250nm之间,包覆层的厚度约5~10nm,并能较好地分散在碳纳米管上。在2~18GHz范围内的电磁参数测试结果表明:制备的复合粉体中Fe/C的比例对材料的电磁参数影响较大。
Carbon nanotubes supported ferrite particles with different Fe / C ratios were prepared by the thermal decomposition of a mixture of carbon nanotubes and liquid Fe (CO) 5 as catalyst precursors, and were used as catalysts to prepare Fe @ C / CNT nano-composite powder. The phase and morphology of the composite powders were analyzed by XRD, FESEM and TEM. The results showed that the nanocomposite powders consisted mainly of carbon-coated Fe particles (Fe @ C) and carbon nanotubes, with Fe @ C Diameter of 10 ~ 250nm, the thickness of the coating is about 5 ~ 10nm, and can be better dispersed in the carbon nanotubes. The results of electromagnetic parameters in the range of 2 ~ 18GHz show that the proportion of Fe / C in the prepared composite powder has a great influence on the electromagnetic parameters of the material.