2020
DOI: 10.1021/acsanm.0c01905
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FeCo Nanowire–Strontium Ferrite Powder Composites for Permanent Magnets with High-Energy Products

Abstract: Due to the issues associated with rare-earth elements, there arises a strong need for magnets with properties between those of ferrites and rare-earth magnets that could substitute the latter in selected applications. Here, we produce a high remanent magnetization composite bonded magnet by mixing FeCo nanowire powders with hexaferrite particles. In the first step, metallic nanowires with diameters between 30 and 100 nm and length of at least 2 μm are fabricated by electrodeposition. The oriented as-synthesize… Show more

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Cited by 15 publications
(21 citation statements)
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“…Choosing the proper anodization process, it is possible to reduce the production time and, more importantly for industrial applications, to reduce the production costs by more than three orders of magnitude, just by the selection of the appropriate template. In spite of the larger dispersion in the diameter of the AAO templates using recycled Al as the starting material, the energy product of all magnetic nanocomposites is the same: 44% with respect to the counterpart bonded magnet made using only SFO nanoparticles [ 23 , 47 ]. Therefore, it is worth noting that the procedure described here allowed us to increase the production rate of CoFe NWs suitable for applications in magnetic nanocomposites, from g/week to mg/week, while decreasing fabrication costs.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Choosing the proper anodization process, it is possible to reduce the production time and, more importantly for industrial applications, to reduce the production costs by more than three orders of magnitude, just by the selection of the appropriate template. In spite of the larger dispersion in the diameter of the AAO templates using recycled Al as the starting material, the energy product of all magnetic nanocomposites is the same: 44% with respect to the counterpart bonded magnet made using only SFO nanoparticles [ 23 , 47 ]. Therefore, it is worth noting that the procedure described here allowed us to increase the production rate of CoFe NWs suitable for applications in magnetic nanocomposites, from g/week to mg/week, while decreasing fabrication costs.…”
Section: Resultsmentioning
confidence: 99%
“…Using this technique, the properties of the NWs can be easily tailored [ 17 , 18 ] to adapt them to specific applications. In particular, taking advantage of their elongated shape, the magnetic properties of metallic NWs can be controlled just by tailoring their shape and composition [ 19 , 20 ]; this has been, for example, recently exploited in the fabrication of corrosion resistant composites [ 21 ], magnetoelectric nanocomposites [ 22 ] and bonded magnets [ 23 ]. In spite of having some promising performance, there are few NW-based magnetic applications on the market, due to the lack of a growth protocol allowing the fabrication of the large amounts of NWs needed to prepare a composite, preventing the transition from the laboratory proof of concept toward the industrial scale to take place.…”
Section: Introductionmentioning
confidence: 99%
“… 1 , 3 , 7 , 11 , 12 Due to its superior magnetic parameters, high permeability, and low conductivity loss, SFO has been widely used in numerous technological applications, which include permanent magnet designs, microwave absorbers, magnetic recording media and sensors, high-frequency electromagnetic (EM) devices, EM shielding devices, and so forth. 1 , 3 7 , 10 …”
Section: Introductionmentioning
confidence: 99%
“… 2 15 Also, composites of SFO with soft magnetic phases and improved magnetic properties achieved through the exchange-spin mechanism have been reported in the literature. 3 , 10 , 16 , 17 For instance, using a conducting polymer and a SFO content for tunability, polypyrrole/SFO composites were designed and tested for efficient EM-shielding purposes. 10 It was demonstrated that the electrical and magnetic properties of such composites can be controlled simply by tuning the SFO content.…”
Section: Introductionmentioning
confidence: 99%
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