轻质、低成本 CoSiO@硅藻土核壳复合材料的高效微波吸收性能

College of Material Science and Engineering, Chongqing University, Chongqing 400044, China.

School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.

Molecules. 2022 Feb 5;27(3):1055. doi: 10.3390/molecules27031055.

The porous and biomimetic cobalt silicate@diatomite (CoSiO@diatomite) was successfully synthesized by a two-step method, including the hydrothermal method and calcination to improve the electromagnetic wave absorption property. Different hydrothermal times were well-tuned for CoSiO@diatomite composites with different loadings of CoSiO. Interestingly, the CoSiO@diatomite composites (6 h, 25 wt%) had a smaller minimum reflection loss. Moreover, the minimum reflection loss (RL) could reach -12.03 dB at 16.64 GHz and the matched absorber thickness was 10 mm, while the effective absorption bandwidth (EAB, RL ≤ -10 dB) could be 1.92 GHz. In principle, such findings indicate that CoSiO@diatomite nanocomposites could be a promising candidate for high-efficiency microwave absorption capability.

多孔仿生钴硅酸盐@硅藻土（CoSiO@diatomite）通过两步法成功合成，包括水热法和煅烧，以提高电磁波吸收性能。不同的水热时间可以很好地调节 CoSiO@硅藻土复合材料的不同负载量。有趣的是，CoSiO@硅藻土复合材料（6 h，25 wt%）具有更小的最小反射损耗。此外，最小反射损耗（RL）在 16.64 GHz 时可达到-12.03 dB，匹配吸收体厚度为 10 mm，同时有效吸收带宽（EAB，RL≤-10 dB）可达 1.92 GHz。原则上，这些发现表明 CoSiO@硅藻土纳米复合材料可能是一种很有前途的高效微波吸收能力的候选材料。