Microstructural and magnetic properties of core–shell FeSiAl composites with Ni0.4Zn0.45Co0.15Fe2O4 layer by sol–gel method

Chen, Jianchuan; Guo, Honggang; Fu, J.; Huang, Sheng-Jiang; Xie, Xuanhao; Li, Lezhong

doi:10.1016/j.jmmm.2021.167774

Cited by 13 publications

(2 citation statements)

References 44 publications

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“…In the chemical coating method, a sol-gel is formed on the magnetic powder surface to generate the SiO 2 coating layer. This method is costly and requires optimisation and adjustment of the chemical solution and reaction conditions whenever the magnetic powder composition and particle size are changed [24][25][26][27]. In contrast, SiO 2 deposition through physical or chemical vapour deposition can be optimised to achieve a high quality of SiO 2 coating on the magnetic powder surface [13,[28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Effect of SiO2/Organosilicone Double Insulation Coating Processes on the Properties of Ferrosilicon Magnetic Cores

Lin,

Zhou,

Jin

et al. 2023

Magnetochemistry

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A nano-SiO2 inorganic insulation layer was coated on the surface of FeSi magnetic powder via in situ fluidised vapour deposition. The surface was then coated with organosilicon resin to form an inorganic/organic double-insulating layer. Post-forming and annealing, a ferrosilicon magnetic powder core was prepared. The effects of organosilicon resin content and pressing pressure on the permeability and loss of the ferrosilicon magnetic core were studied. When the ferrosilicon magnetic core was doubly insulated with SiO2/silicone resin, the silicone resin content increased, the insulation coating gradually thickens, and the saturation magnetic-induction intensity of the magnet gradually decreases; the density and effective permeability showed a trend of increasing first and then decreasing. Increasing the forming pressure can reduce the loss of the core, thereby improving the performance of the core and increasing the permeability without damaging the double-cladding layer. In the powder with the optimised silicone resin content (1.5 wt.%), the magnetic properties of the magnetic core were maximised after preparation at 1500 MPa followed by heat treatment at 773 K. The saturation magnetisation was 187.5 emu/g and the resistivity and permeability reached 10.5 Ω·cm and 49.6, respectively, at 100 mT and 50 kHz. The total loss was 905 mW/cm3.

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Section: Introductionmentioning

confidence: 99%

Effect of SiO2/Organosilicone Double Insulation Coating Processes on the Properties of Ferrosilicon Magnetic Cores

Lin,

Zhou,

Jin

et al. 2023

Magnetochemistry

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“…A variety of methods for coating, such as the sol–gel method [ 10 ], the ball milling method [ 11 ], the bonding method [ 12 ], and the liquid phase method [ 13 ], have been used, all having their own advantages and disadvantages. But in most coating processes, it is very difficult to obtain an ideal coating, i.e., as thin as a mono-atom layer, fully dense, continuous and with a high electric resistance.…”

Section: Introductionmentioning

confidence: 99%

Low Core Losses of Fe-Based Soft Magnetic Composites with an Zn-O-Si Insulating Layer Obtained by Coupling Synergistic Photodecomposition

Wang

Zheng

et al. 2022

Materials

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The major method used to reduce the magnetic loss of soft magnetic composites (SMCs) is to coat the magnetic powder with an insulating layer, but the permeability is usually sacrificed in the process. In order to achieve a better balance between low losses and high permeability, a novel photodecomposition method was used in this study to create a ZnO insulating layer. The effect of the concentration of diethyl zinc on the formation of a ZnO insulating film by photodecomposition was studied. The ZnO film was best formed with a diethyl zinc n-hexane solution at a concentration of around 0.40 mol/L. Combined with conventional coupling treatment processes, a thin and dense insulating layer was coated on the surface of iron powder in situ. Treating the iron powder before coating by photodecomposition led to a synergistic effect, significantly reduced core loss, and the effective permeability only decreased slightly. An iron-based soft magnetic composite with a loss value of 124 kW/m3 and an effective permeability of 107 was obtained at the frequency of 100 kHz and a magnetic field intensity of 20 mT.

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Improvement of electromagnetic properties of FeSiAl soft magnetic composites

et al. 2023

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Microstructural and magnetic properties of core–shell FeSiAl composites with Ni0.4Zn0.45Co0.15Fe2O4 layer by sol–gel method

Cited by 13 publications

References 44 publications

Effect of SiO2/Organosilicone Double Insulation Coating Processes on the Properties of Ferrosilicon Magnetic Cores

Effect of SiO2/Organosilicone Double Insulation Coating Processes on the Properties of Ferrosilicon Magnetic Cores

Low Core Losses of Fe-Based Soft Magnetic Composites with an Zn-O-Si Insulating Layer Obtained by Coupling Synergistic Photodecomposition

Improvement of electromagnetic properties of FeSiAl soft magnetic composites

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