Double-shell hollow glass microspheres@Co2SiO4 for lightweight and efficient electromagnetic wave absorption
Double-shell hollow glass microspheres@Co2SiO4 for lightweight and efficient electromagnetic wave absorption
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双壳空心玻璃微球@Co2SiO4，轻质高效电磁波吸收
DOI：
10.1016/j.cej.2020.127313
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发表时间：
2021-01-15
影响因子：
15.1
通讯作者：
Wu, Hongjing
中科院分区：
文献类型：
--
作者：
Lan, Di;Gao, Zhenguo;Wu, Hongjing
采用水热法和进一步煅烧法制备了新型的硅酸钴（Co2SiO4）包覆双壳中空玻璃微球。通过对样品的相、形貌和电磁波吸收特性的详细表征，我们发现磁损耗成分Co2SiO4和介电损耗成分HGMs的组合对电磁波的引入和耗散起着重要的作用。在讨论部分，我们重点比较了复合材料与单组分，并详细说明了新型复合材料结构对材料稳定性和电磁波吸收性能的影响。当匹配厚度(d)为2.9 mm时，HGMs@Co2SiO4的最小反射损耗（RLmin）达到46.7 dB，对应的有效吸收带宽（f(E), RL < 10 dB）为5.92 GHz。我们相信，新型双壳材料HGMs@Co2SiO4将成为新一代稳定、轻质、高效的电磁波吸收材料的优秀候选者。
Novel double-shell hollow glass microspheres (HGMs) coated with cobalt silicate (Co2SiO4) were synthesized by hydrothermal method with a further calcination process. Through the detailed characterization of phase, morphology and electromagnetic (EM) wave absorption properties of the samples, we found that the combination of magnetic loss component Co2SiO4 and dielectric loss component HGMs plays an important role in the introduction and dissipation of EM wave. In the discussion part, we focused on comparing the composite with the single component and explained the influence of the new composite structure on the stability and EM wave absorbing properties of the materials in detail. The minimum reflection loss (RLmin) of the HGMs@Co2SiO4 reached up to 46.7 dB with a matching thickness (d) of 2.9 mm, and the corresponding effective absorption bandwidth (f(E), RL < 10 dB) was 5.92 GHz. We are confident that the new type of double-shell HGMs@Co2SiO4 will be an excellent candidate for a new generation of stable, lightweight and efficient EM wave absorbing material.