Fe/Fe3O4@mSiO2 Core–Shell Nanostructures for Broad-Band Microwave Absorption
Source abstract
Abstract
Fe/Fe 3 O 4 composite particles with mesoporous silica (mSiO 2 ) shells were successfully prepared via solvothermal reaction combined with hydrogen-thermal reduction. The introduction of mSiO 2 on the surfaces of Fe 3 O 4 constructs a ventilated frame and thereafter sustains the dispersion of the fine Fe particles that emerge from the reduction reaction. The conversion of Fe 3 O 4 to Fe nanoparticles enhances the ferromagnetic loss, while the Fe 3 O 4 /Fe/mSiO 2 interfaces induce an intensified dielectric loss. Fe/Fe 3 O 4 @mSiO 2 -500 (FFm-500) presents excellent electromagnetic wave-absorbing performances. The coating using FFm-500 as fillers presents a minimum reflection loss of −26.81 dB, together with an effective absorption bandwidth of 6.66 GHz. The results revealed the key role of mSiO 2 in the synthesis of Fe/Fe 3 O 4 nanostructures and the unique potential of Fe/Fe 3 O 4 @mSiO 2 as broad-band EMA fillers.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Magnetic Properties and Synthesis of Ferrites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Precision Machinery Research Institutes of Shanghai Space Flight Academy, Shanghai 201600, China
National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Funding
National Natural Science Foundation of China
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