Controlled chemical synthesis and enhanced performance of micron-sized FeCo particles

•We have reported a controlled chemical method for preparing 1–5μm FeCo particles.•The large grain FeCo particles exhibit high saturation magnetization of 199–211Am2/kg.•High compaction density of 7.1–7.4g/cm3 is achieved from as-synthesized FeCo particles. A direct controlled chemical method for pr...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-12, Vol.615, p.322-326
Main Authors: Yang, B., Cao, Y., Zhang, L., Li, R.F., Yang, X.Y., Yu, R.H.
Format: Article
Language:English
Subjects:
Alloys
bcc-FeCo phase
Chemical method
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
High density
High saturation magnetization
Intermetallic compounds
Magnetic cores
Magnetic devices
Magnetic properties
Magnetic properties and materials
Micron-sized FeCo particles
Near net shaping
Physics
Saturation (magnetic)
Small particles and nanoscale materials
Stability
Studies of specific magnetic materials
Synthesis
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Summary:•We have reported a controlled chemical method for preparing 1–5μm FeCo particles.•The large grain FeCo particles exhibit high saturation magnetization of 199–211Am2/kg.•High compaction density of 7.1–7.4g/cm3 is achieved from as-synthesized FeCo particles. A direct controlled chemical method for preparing large grain FeCo particles with micron level has been reported in this work. Nearly spherical bcc-FeCo alloy particles with average particle size of 1–5μm have been synthesized by controlled reduction reactions of Fe2+ and Co2+ ions in the water/CTAB/n-butanol/n-hexane microemulsion system. The micron-scale FeCo particles exhibit good intrinsic magnetic properties with high saturation magnetization of 199–211Am2/kg, due to their high purity and single bcc-FeCo phase. The FeCo-based magnetic cores with high density of 7.12–7.45g/cm3 can be produced via powder compacting molding process. The simple preparation process, good air stability, high saturation magnetization and good compaction ability for the chemically synthesized micro-scale FeCo particles, promise the great potential use of these materials for the full-density, near-net-shape and complex-shaped FeCo-based soft magnetic devices in high-power applications.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.06.181