Magnetic properties of some iron powders and ore concentrates

Soft magnetic composites (SMCs) can be described as soft magnetic powders covered by electrically insulating layers. In this work, iron powders with high purity and organic-silicon epoxy resin were chosen for good magnetic properties, thermal stability, and mechanical properties, respectively. The effect of amount of resin, different annealing temperatures on the microstructure, and performance of SMCs was investigated. Results show that organic-silicon epoxy resin has excellent properties as dielectric coating materials for coating iron powders and maximum heat-resistant temperature is about 400 ℃. According to magnetic properties and flexural strength analysis, the optimum annealing temperature of organic-silicon epoxy resin-coated composite is 200 ℃. Furthermore, the finite element analysis indicates that the strength of the whole composites is related to the adhesion of resin and iron and the strength of resin itself.

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Preparation and Magnetic Properties of Fe@SiO2 Soft Magnetic Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.993.638 ◽

2020 ◽

Vol 993 ◽

pp. 638-645

Author(s):

Shuai Feng ◽

Yan An ◽

Zong Xiang Wang ◽

Kai Sun ◽

Run Hua Fan

Keyword(s):

Magnetic Properties ◽

Sol Gel ◽

Core Loss ◽

Low Frequency ◽

Magnetic Flux Density ◽

Iron Particles ◽

Soft Magnetic ◽

Magnetic Composites ◽

Insulating Layer ◽

Iron Powders

In this work, the insulating SiO2 was coated successfully on the surface of reduced iron particles by a sol-gel method to decrease the core loss at low frequency. The scanning electron microscope images and elements analysis confirm that the surface of iron powders particles were covered by a thin insulating layer in the form of uniform core-shell structure. The samples were annealed at 400 °C in N2 atmosphere to obtain better magnetic properties. The annealed SMCs with 10 mL/h dropping rate of TEOS have optimum magnetic properties with low core loss Ps of 280.89 W/kg and high saturation magnetic flux density Bs of 1.038 T at 1000 Hz.

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Enhanced soft magnetic properties of iron powders through coating MnZn ferrite by one-step sol–gel synthesis

Chinese Physics B ◽

10.1088/1674-1056/28/5/057503 ◽

2019 ◽

Vol 28 (5) ◽

pp. 057503 ◽

Cited By ~ 3

Author(s):

Dong Liu ◽

Shanmin Gao ◽

Rencheng Jin ◽

Feng Wang ◽

Xiaoxiao Chu ◽

...

Keyword(s):

Magnetic Properties ◽

Sol Gel ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Mnzn Ferrite ◽

Iron Powders ◽

One Step ◽

Sol Gel Synthesis

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Processing and magnetic properties of iron powders clad with phosphorus and nickel–phosphorus

Powder Metallurgy and Metal Ceramics ◽

10.1007/s11106-011-9326-9 ◽

2011 ◽

Vol 50 (5-6) ◽

pp. 256-261

Author(s):

N. V. Boshitskaya ◽

O. V. Vlasova ◽

L. M. Apininskaya ◽

T. M. Yarmola ◽

I. V. Uvarova

Keyword(s):

Magnetic Properties ◽

Iron Powders

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Influence of Lamellar Graphite Additions on the Electro-Magnetic Properties of Carbonyl Iron

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.915-916.690 ◽

2014 ◽

Vol 915-916 ◽

pp. 690-693

Author(s):

Zhen Jian Lv ◽

Zhao Yang Zeng ◽

Xing Wei Ji ◽

Ming Lu

Keyword(s):

Magnetic Properties ◽

Carbonyl Iron ◽

Mass Ratio ◽

Iron Powders ◽

Magnetic Parameters ◽

Lamellar Graphite ◽

Electro Magnetic

For the purpose of investigating the influence of graphite addition on the property of carbonyl iron absorber, some samples were made by mixing graphite and carbonyl iron powders. The electro-magnetic parameters were then measured and compared between samples containing different graphite mass ratio. Microstructures of these samples were observed to make sure that additions were uniformly distributed in these samples. By this way, the influence of graphite addition was systematically analyzed.

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