Excellent microwave absorption performances of high length-diameter ratio iron nanowires with low filling ratio
- 16 June 2020
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 31 (39), 395708
- https://doi.org/10.1088/1361-6528/ab9d41
Abstract
Reducing the filling content of high-density ferromagnetic particles is a key prerequisite for obtaining lightweight absorbers. To this end, large iron nanowires (Fe NWs) with high length-diameters, uniform length of approximately 21 μm and diameters of approximately 60 nm were synthesized through a facile magnetic field-induced in situ reduction method without templates and surfactants. The phase structures, and micromorphology of the high-aspect-ratio Fe NWs were analyzed, and the electromagnetic properties of Fe NWs-paraffin composites were measured with a vector network analyzer at 2-18 GHz. The Fe NWs-paraffin composite with a low filler loading also exhibited satisfactory microwave absorption performance, and the composites filled with 20 wt.% of as-prepared Fe NWs shows a minimum reflection loss (RLmin) of -44.67 dB at 2.72 GHz and effective absorption bandwidth (EAB) with reflection loss below -10 dB reached 8.56 GHz at a layer thickness of 1.42 mm. At a thickness of 3 mm, the RLmin value and EAB (RL≤−10 dB) reached -29.74 dB and 3.28 GHz (3.84-7.12 GHz), respectively. This study suggests that Fe NWs with high-aspect-ratios have promising microwave absorbing applications, and provides a good reference for the preparation of ferromagnetic metal-based lightweight electromagnetic wave-absorbing materials.Keywords
Funding Information
- Science and Technology Research Project of Chongqing Municipal Education Commission (KJQN201800644)
- Special Key Project of Technological Innovation and Application Development in Chongqing (cstc2019jscx-fxydX0085)
- National Natural Science Foundation of China (61901073)
- Natural Science Foundation of Chongqing, China (cstc2019jcyj-msxmX0696)
This publication has 72 references indexed in Scilit:
- Submicrometer-sized NiO octahedra: facile one-pot solid synthesis, formation mechanism, and chemical conversion into Ni octahedra with excellent microwave-absorbing propertiesJournal of Materials Chemistry, 2012
- Synthesis of hexagonal Fe microflakes with excellent microwave absorption performanceCrystEngComm, 2012
- Solution synthesis and novel magnetic properties of ball-chain iron nanofibersJournal of Materials Research, 2011
- Controllable synthesis and morphology-dependent microwave absorption properties of iron nanocrystalsJournal of Materials Science, 2011
- Strategy for Ultrafine Ni Fibers and Investigation of the Electromagnetic CharacteristicsThe Journal of Physical Chemistry C, 2010
- Synthesis, Multi-Nonlinear Dielectric Resonance, and Excellent Electromagnetic Absorption Characteristics of Fe3O4/ZnO Core/Shell NanorodsThe Journal of Physical Chemistry C, 2010
- One-pot low temperature solution synthesis, magnetic and microwave electromagnetic properties of single-crystal iron submicron cubesJournal of Materials Chemistry, 2010
- Synthesis, Properties, and Applications of Iron NanoparticlesSmall, 2005
- GHz microwave absorption of a fine α-Fe structure produced by the disproportionation of Sm2Fe17 in hydrogenJournal of Alloys and Compounds, 2002
- Dielectric Spectroscopy of Ferromagnetic SemiconductorsReviews of Modern Physics, 1957