Using selective laser sintering (SLS) 3D printing and special finishing techniques, two new materials are made, NFG/Fe3O4 and NFG/SiCnw, which can absorb microwaves really well. These materials show that 3D printing can make complex shapes for soaking up microwaves. This can lead to making very good materials for blocking microwaves in many different industriesd.This study details the creation of NFG/Fe3O4 and NFG/SiCnw composites utilizing selective laser sintering (SLS) technology, along with a range of postprocessing methods for structural?functional integration in electromagnetic microwave absorption, based on the preparation of hybrid powders. The NFG/Fe3O4 composite, after vacuum impregnation with epoxy resin solution, reaches a flexural strength of 7.12?MPa. At a thickness of 2?mm, the composite exhibits a minimum reflection loss (RL) of ?41.81?dB and an effective absorption bandwidth (EAB) of 6.56?GHz. The green bodies produced by SLS feature rich microporous structures, which provide an optimal environment for the in?situ generation of SiCnw during high?temperature sintering. The efficient microwave absorption properties of the NFG/SiCnw composite stem from the synergy between conductivity loss and polarization loss, as well as multiple reflection and scattering loss mechanisms. When the thickness is 1.5?mm, the porous NFG/SiCnw composite demonstrates remarkable electromagnetic microwave absorption capabilities, with an RLmin of ?51.10?dB and an EAB of 5.04?GHz. The NFG/Fe3O4 and NFG/SiCnw composites, fabricated using SLS technology and enhanced through various postprocessing techniques, successfully combine radar wave absorption and structural support, offering immense potential for industrial applications in electromagnetic wave absorption.

» Author: Qiufu Gan, Shixiong Deng, Yaoling Huang, Linhua He, Haihua Wu, Kaixin Deng, Wenxin Fu, Bin Chao, Guoxun Chen, Wei Liu

» Publication Date: 11/01/2025

» More Information

« Go to Technological Watch