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Volume 13 | Issue 9 | Year 2026 | Article Id. IJME-V13I9P106 | DOI : https://doi.org/10.14445/23488360/IJME-V13I9P106

Low-Frequency Magnetic Field Mitigation Using Recyclable Sintered Pure-Iron Powder Compacts for Safer Power and Sensor Infrastructure

Viraj Barge, Nitin Satpute, Mukund Kulkarni

Received Revised Accepted Published
12 Jun 2026 04 Sep 2026 18 Sep 2026 26 Sep 2026

Citation :

Viraj Barge, Nitin Satpute, Mukund Kulkarni, "Low-Frequency Magnetic Field Mitigation Using Recyclable Sintered Pure-Iron Powder Compacts for Safer Power and Sensor Infrastructure," International Journal of Mechanical Engineering, vol. 13, no. 9, pp. 89-106, 2026. Crossref, https://doi.org/10.14445/23488360/IJME-V13I9P106

Abstract

High-current carrying conductors, electrical machines, power-electronic systems, and sensors generate low-frequency magnetic fields that can cause electromagnetic interference and may result in higher magnetic-field exposure in occupied or sensitive environments. This study proposes a new low frequency shielding material in the form of sintered pure-iron powder compacts as an alternative to the conventional high-permeability magnetic shielding alloys. This material is manufactured by following controlled environment annealing, green compaction and sintering of high purity iron powder. The magnetic properties of the compacted specimen were determined by characterization according to IEC 60404-4 standard, and scanning electron microscopy was used to study the microstructural features, and chemical analysis was performed by using energy dispersive spectroscopy to validate purity of the iron powder. Experimentally determined magnetic properties were used in finite element simulations to evaluate the shielding performance when different shielding geometries manufactured from the proposed material are placed around a current-carrying conductor. Analysis was done when the conductor carries current of 1000 Amp with focus to evaluate different shielding topologies, including open, square, hexagonal and circular shapes. Analysis indicated that the circular closed-shielding geometry can achieve better shielding effectiveness by ensuring a low-reluctance flow path for magnetic-flux shunting. Finite element simulation results indicated that the proposed pure-iron compact based shielding can ensure shielding effectiveness of 12.6 dB, as compared with 13.35 dB for Mu-metal and 11.24dB for Fe–Si steel. There will be 79% attenuation of the magnetic field at radial distance of 1 m from the conductor with use of the proposed shielding material. The proposed material has several sustainability advantages beyond providing shielding performance, which includes use of recyclable pure iron, reduced dependence on expensive Ni-based alloys, geometry flexibility, and repairability. The proposed material can provide safer, reliable, and more sustainable low-frequency magnetic shielding for use in power infrastructure, sensor systems, medical instrumentation, electric vehicle modules, and industrial equipment.

Keywords

Low-frequency magnetic shielding, Sustainable shielding material, Sintered pure iron, Magnetic field attenuation, Recyclable magnetic material.

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