Lightweight, Low-Cost Co<sub>2</sub>SiO<sub>4</sub>@diatomite Core-Shell Composite Material for High-Efficiency Microwave Absorption
Yifan Zhang,
Rui Cai,
Dashuang Wang,
Kailin Li,
Qing Sun,
Yuntao Xiao,
Hao Teng,
Xiaohan Huang,
Tao Sun,
Zhaohui Liu,
Kexin Yao,
Yuxin Zhang,
Pingan Yang
Affiliations
Yifan Zhang
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Rui Cai
School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Dashuang Wang
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Kailin Li
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Qing Sun
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, China
Yuntao Xiao
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Hao Teng
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Xiaohan Huang
Department of Military Facilities, Army Logistics University of PLA, Chongqing 401311, China
Tao Sun
Department of Military Facilities, Army Logistics University of PLA, Chongqing 401311, China
Zhaohui Liu
Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, China
Kexin Yao
Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, China
Yuxin Zhang
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Pingan Yang
School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
The porous and biomimetic cobalt silicate@diatomite (Co2SiO4@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 Co2SiO4@diatomite composites with different loadings of Co2SiO4. Interestingly, the Co2SiO4@diatomite composites (6 h, 25 wt%) had a smaller minimum reflection loss. Moreover, the minimum reflection loss (RLmin) 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 Co2SiO4@diatomite nanocomposites could be a promising candidate for high-efficiency microwave absorption capability.
