2"/> 2 nanoparticles. This method combines chemical reduction and sol-gel to realize the controllable shell-core structure of composite particles. By changing the thickness of SiO2 shell, the effect of shell thickness on microwave absorption performance was studied, and the microwave absorption mechanism was analyzed and explained. With the increase of SiO2 shell thickness, the microwave absorption capacity of the particles increases first and then decreases. When the thickness of the SiO2 shell is 38 nm, the FeBP@SiO2 sample has a nice microwave absorption performance, and the reflection loss at a thickness of 2.19 mm obtains better absorption performance ( -52.66 dB ). This enhanced microwave absorption performance mainly comes from the new magnetic-dielectric interface, thereby improving the impedance matching and dielectric loss of the material. By designing the shell-core structure of the composite particles, the performance regulation of the composite absorber can be achieved. Therefore, this work might provide an important reference for the design of the next generation of new composite microwave absorbing materials."/>
[Wan Xinyu, Zhao Dong, Xiang Ling, Chang Ling, Wang Qunshou, Pei Wenli. Controllable Preparation and Microwave Absorbing Properties of FeBP@SiO2 Core-shell Nanocomposites[J]. Rare Metal Materials and Engineering,2023,52(12):4155~4163.]
DOI:10.12442/j. issn.1002-185X.20220903