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

• 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
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2014.06.181

•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.