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 (RL_min) 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.

通过水热法和进一步的煅烧工艺，合成了新型的包覆有硅酸钴（Co ₂ SiO ₄）的双层中空玻璃微球（HGMs）。通过对样品的相，形貌和电磁波（EM）吸收特性的详细表征，我们发现磁损耗成分Co ₂ SiO ₄和介电损耗成分HGMs的组合在EM波的引入和消散中起重要作用。 。在讨论部分中，我们着重于将复合材料与单一组分进行比较，并详细解释了新型复合材料结构对材料的稳定性和EM波吸收性能的影响。最小反射损耗（RLHGMs @ Co ₂ SiO _4的min）达到-46.7dB，匹配厚度（ d）为2.9 mm，相应的有效吸收带宽（ f _E， RL <-10 dB）为5.92 GHz。我们有信心，新型的双壳HGMs @ Co ₂ SiO ₄将成为新一代稳定，轻巧和高效的EM吸波材料的理想选择。