WITHDRAWN: Development of Lightweight Microwave-Absorbing Composites Incorporating NFG/MZFO Resin-Matrix Materials via Selective Laser Sintering

Since radar detection technology and other wireless devices are developing decisively, materials that absorb microwave radiation are essential for reducing electromagnetic interference and improving energy efficiency. Microwave-absorbing composites are essential for enhancing radar stealth and reducing electromagnetic emissions by converting microwave energy into heat. The Natural flake graphite (NFG) /Manganese Zinc Ferrite Oxide (MZFO) resin matrix composites were fabricated utilizing selective laser sintering (SLS) alongside vacuum pressure impregnation of epoxy resin. Finally, the results of various NFG-MZFO contents regarding composites' mechanical and wave attenuation properties were examined. Given the rise in MZFO content and decrease in NFG content, it was found that the open porosity decreases. In contrast, the bending strength increases with higher MZFO content, while the bulk density also rises. The microwave absorption properties of the composites initially improve but then decline as the MZFO content continues to increase. When the NFG-MZFO content is 2:3, the NFG-MZFO/resin matrix composites exhibit excellent microwave absorption performance; the minimum reflection loss is -32.67 dB; the absorption bandwidth is 4.43 GHz (13.51–17.94 GHz), and good mechanical properties are achieved with a tensile strength of 5.76 MPa and a thickness of 2.5 mm with 63.78% open porosity and bulk density 0.88g/cm 3 . The conductive network is formed by natural flake graphite, MZFO forms the magnetic permeability network, and the network is enhanced by epoxy resin. The NFG-MZFO/resin matrix composites made using the technique articulated in this work exhibit good microwave absorption performance, load-bearing capacity, and lightweight properties.