Key Laboratory of Cluster Science, Ministry of Education of China, Department of Chemistry, Beijing Institute of Technology, Beijing 100081, PR China.
Phys Chem Chem Phys. 2013 May 28;15(20):7685-9. doi: 10.1039/c3cp50778e. Epub 2013 Apr 17.
CoNi alloy nanoparticles anchored on a spherical carbon monolith (CoNi-C) were prepared by a solvothermal route and subsequent heat treatment without any templates. Their permittivity and permeability behaviors were studied in the frequency range of 2-18 GHz. The CoNi-C composites showed the best microwave absorbing performances compared to those of Co-C and Ni-C. The maximum reflection loss of the CoNi-C nanocomposites can reach -50.2 dB at 7.7 GHz with samples of 4 mm in thickness, better than that of the Ni-C composites, while the Co-C composites showed almost no absorption at all. The absorption mechanism of the three absorbents was also discussed.
采用溶剂热法和后续热处理制备了负载在球形碳块上的 CoNi 合金纳米粒子（CoNi-C），无需使用任何模板。在 2-18GHz 的频率范围内研究了它们的介电常数和磁导率特性。与 Co-C 和 Ni-C 相比，CoNi-C 复合材料表现出最佳的微波吸收性能。在厚度为 4mm 的样品中，CoNi-C 纳米复合材料在 7.7GHz 时的最大反射损耗可达-50.2dB，优于 Ni-C 复合材料，而 Co-C 复合材料几乎没有吸收。还讨论了三种吸收剂的吸收机制。
