Fabrication of ZnO/Fe rod-like core-shell structure as high-performance microwave absorber

One‐Pot Hydrothermal Synthesis of Co3O4/MWCNTs/Graphene Composites with Enhanced Microwave Absorption in Low Frequency Band

“…Thus, combining the ferrites with dielectric loss materials is a feasible strategy to enhance the microwave absorption properties of composites. [19][20][21] In recent years, MWCNTs and graphene have received increasing attentions due to their unique physical properties such as low density, low resistivity, good heat stability, special nanostructure etc., which benefit for enhancing the dielectric loss and reducing the density of the composites. [22][23][24] Based on these, Huang et al [25] fabricated Fe 2 O 3 /Fe 3 O 4 /MWCNTs by a facile hydrothermal method.…”

“…However, the comprehensive microwave absorption performance of ferromagnetic metals and their oxides were very limited for the single magnetic loss mechanism, poor impedance matching, high density and so on. Thus, combining the ferrites with dielectric loss materials is a feasible strategy to enhance the microwave absorption properties of composites . In recent years, MWCNTs and graphene have received increasing attentions due to their unique physical properties such as low density, low resistivity, good heat stability, special nanostructure etc., which benefit for enhancing the dielectric loss and reducing the density of the composites .…”

Self-Assembled ZnO/Co Hybrid Nanotubes Prepared by Electrospinning for Lightweight and High-Performance Electromagnetic Wave Absorption

“…24−26 For example, rod-like ZnO coated by iron exhibits superior performance than ZnO alone in both absorption strength and effective absorption bandwidth in the 2−18 GHz range. 27 Among the soft magnetic metal, Co exhibits higher thermodynamically stability than Fe and larger saturation magnetization value than Ni. Thus, metallic Co exhibits better integrated performance among the soft metallic magnetic materials.…”

“…Meanwhile, the introduction of magnetic materials brings about the magnetic loss to EM waves, which further improves the EM absorbing performance. Soft magnetic metal (Fe, Co, and Ni) exhibits large saturation magnetization and high Snoek’s limit, which leads to a better EM wave absorption capacity than other magnetic materials. − For example, rod-like ZnO coated by iron exhibits superior performance than ZnO alone in both absorption strength and effective absorption bandwidth in the 2–18 GHz range . Among the soft magnetic metal, Co exhibits higher thermodynamically stability than Fe and larger saturation magnetization value than Ni.…”

In-Situ Conversion of ZnO/Ni3ZnC0.7/CNT Composite from NiZn Bimetallic MOF Precursor with Enhanced Electromagnetic Property

“…MOFs possess desirable advantages, i.e., porous structures, abundant hetero-interfaces, magnetic and dielectric dual losses, and large specific area. Until now, multiple MOF-derived composite absorbers such as ZnO/Fe/Fe 3 C/C [ 10 ], Co 3 O 4 /Co/RGO [ 11 ], ZnO/SiC [ 12 ], ZnO/Fe [ 13 ], ZnO/Co 3 ZnC/Co/C [ 14 ] have been fabricated and have been shown to exhibit good microwave absorbing properties. However, the filler loading in matrix of these recent MOF-derived absorbers is generally more than 40 wt.%, which fails to fulfill the lightweight requirement for new-generation electromagnetic absorbers.…”