Zhang Yanan, Quan Bin, Liu Wei, Liang Xiaohui, Ji Guangbin, Du Youwei
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, P. R. China.
Dalton Trans. 2017 Jul 18;46(28):9097-9102. doi: 10.1039/c7dt01471f.
In this work, a one-pot strategy was proposed to synthesize carbon-coated FeO and carbon-coated FeC via the pyrolysis of colloidal FeO nanocrystals capped with oleic acid (OA) at different calcination temperatures. After exploring the microwave absorption performance of these composites, we found that carbon-coated FeC obtained at 700 °C possesses higher reflection loss (RL) and broader effective bandwidth (RL ≤ -10 dB) at low thickness. So the further investigation of the microwave absorption performance for carbon-capped FeC composites mixed with different mass percentages of paraffin was also carried out. The results demonstrated that the multi-dielectric relaxation process and better impedance matching, especially at low thickness and high frequency, contributed to the preferable microwave absorption greatly.
在本工作中，提出了一种一锅法策略，通过在不同煅烧温度下对用油酸（OA）包覆的胶体FeO纳米晶体进行热解来合成碳包覆的FeO和碳包覆的FeC。在探究了这些复合材料的微波吸收性能后，我们发现700℃下获得的碳包覆FeC在低厚度时具有更高的反射损耗（RL）和更宽的有效带宽（RL≤ -10 dB）。因此，还对与不同质量百分比石蜡混合的碳包覆FeC复合材料的微波吸收性能进行了进一步研究。结果表明，多介电弛豫过程和更好的阻抗匹配，尤其是在低厚度和高频下，对优异的微波吸收有很大贡献。
