Effects of Annealing Temperature and Compaction Pressure on Magnetic Properties of Fe–Si Powder Cores Fabricated by an Improved Bluing Method

Journal Article · Tue May 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4358-0· OSTI ID:22771307

Zhang, Z. ^[1]; Wu, P. ^[2]; Han, S. J. ^[1]; Tang, F. L. ^[3]; Tong, X. C.; Wu, Y. M. ^[2]; Du, Y. W. ^[3]

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1. Hefei University of Technology, School of Materials Science and Engineering and Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices (China)
2. Electric Power Science Research Institute of Jiangsu Electric Power Company (China)
3. Jiangsu Red Magnetic Materials Incorporation, Huaian Engineering Research Center of Soft Magnetic Powder Cores and Devices (China)

Fe-6.5wt%Si soft magnetic powder cores were prepared by using an improved bluing insulation method. A high-quality oxide insulation layer with good temperature stability was found to distribute continuously in the intervals between the Fe–Si particles. The effects of the annealing temperature and the compaction pressure on the core’s magnetic properties were investigated in detail. It was found that high temperature and low compaction pressure are beneficial to decrease the core’s inner stress and high compaction pressure is helpful to reduce the air gap. All the variations of the magnetic performance for the powder cores discussed in this paper were explained reasonably by considering these two factors. From the point of view of low loss, 760 °C and 2090 MPa were confirmed to be the relatively best annealing temperature and compaction pressure, respectively. The μ{sub e}, the % μ{sub e} at 100 Oe, and the loss at 50 kHz/1000 Gs for the core prepared under these two conditions are 63.57, 72.82%, and 547.66 mW/cm{sup 3}, respectively.

• OSTI ID: 22771307
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 5; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AIR
ANNEALING
IRON
KHZ RANGE
MAGNETIC PROPERTIES
OXIDES
POWDERS
PRESSURE RANGE MEGA PA
SILICON
STRESSES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K