电纺丝法制备的 Co/C 和 Ni/C 复合纳米纤维的微波吸收特性

IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Sa Zhang, Chao Xiong, Junhui Yin, Haitao Sun, Ziyuan Qi, Huiyong Deng, Kaibo Cui
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引用次数: 0

摘要

通过电纺丝和热处理两步法合成了含有钴、镍纳米粒子的碳纳米纤维。使用 X 射线衍射仪 (XRD)、扫描电子显微镜 (SEM)、能量色散光谱仪 (EDS) 和矢量网络分析仪 (VNA) 对其相组成、微观结构、元素组成和电磁特性进行了表征。此外,还研究了这些碳纳米纤维的微波吸收性能。结果表明,这些复合纳米纤维完好无损,由无定形碳和面心立方结构的磁性金属组成。由此产生的金属纳米颗粒沿碳基纳米纤维均匀分布,增强了磁损耗和介电损耗之间的协同和界面效应。当吸收体厚度为 1.5 mm 时,Co/C、Ni/C 复合纳米纤维的吸收带宽(RL ≤ -10 dB)分别约为 4 GHz 和 2.5 GHz,明显优于纯碳纳米纤维。与 Ni/C 复合纳米纤维相比,Co/C 复合纳米纤维具有更宽的吸收频带范围和更强的微波吸收强度,这得益于其优异的电磁阻抗匹配和衰减特性。这表明 Co/C 复合纳米纤维有望成为新型微波吸收材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microwave absorption properties of Co/C and Ni/C composite nanofibers prepared by electrospinning
Carbon nanofibers with Co, Ni nanoparticle were synthesized by a two-step process involving electrospinning and heat treatment. Their phase composition, microstructure, elemental composition and electromagnetic characteristics were characterized using x-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and vector network analyzer (VNA). The microwave absorption performance of these carbon nanofibers was also studied. The results indicate that these composite nanofibers are intact and consist of amorphous carbon and face-centered cubic structured magnetic metals. The resultant metal nanoparticles are uniformly dispersed along carbon-based nanofibers which enhance the synergistic and interfacial effects between magnetic loss and dielectric loss. When the thicknesses of the absorbers are 1.5 mm, the absorption bandwidths (RL ≤ −10 dB) are approximately 4 GHz and 2.5 GHz for the Co/C, Ni/C composite nanofibers, respectively, which are obviously superior to pure carbon nanofibers. Co/C composite nanofibers exhibit a wider absorption band range and stronger microwave absorption intensity compared to Ni/C composite nanofibers, attributed to their excellent electromagnetic impedance matching and attenuation characteristics. This indicates that the Co/C composite nanofibers are promising candidates for novel microwave absorbing materials.
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来源期刊
Materials Research Express
Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
4.50
自引率
4.30%
发文量
640
审稿时长
12 weeks
期刊介绍: A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.
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