Journal of Materials Engineering

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Effects of hydrophilic and hydrophobic SiO₂ composite organic resin coating on properties of FeSiCr magnetic powder cores

Xiaoxiang LAI, Hongya YU, Yue FENG, Xichun ZHONG, Zhongwu LIU

Journal of Materials Engineering, 2022, 50(2): 135-143. DOI: 10.11868/j.issn.1001-4381.2021.000053

Fig.1 FTIR patterns of powders coated with HP, HB-1 and HI-1

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Fig.2 Morphologies of FeSiCr powders prepared by different coated processes (a)raw powder; (b)HP; (c)HB-1;(d)HB-2;(e)HB-3;(f)HI-1;(g)HI-2;(h)HI-3
Fig.3 Cross section and element distribution of magnetic powder cores prepared by HB-1(a) and HI-1(b)
Fig.4 Density and specific resistance of annealed magnetic powder cores prepared by different coating processes
Fig.5 Saturation magnetization of powders prepared by different coating processes
Fig.6 Effective permeability as a function of frequency for unannealed magnetic powder cores prepared by different coating processes
Fig.7 Core loss as a function of frequency for unannealed magnetic powder cores prepared by different coating processes
Table 1 Core loss of magnetic powder cores prepared by different coating processes at 20 mT and 100 kHz before annealing
Fig.8 DC-bias properties of magnetic powder cores prepared by different coating processes
Fig.9 Thermal mass loss curves of FeSiCr powders prepared by different coating processes in high purity argon
Fig.10 Coercivity of unannealed and annealed magnetic powder cores prepared by different coating processes
Fig.11 Effective permeability as a function of frequency for annealed magnetic powder cores prepared by different coating processes
Fig.12 Core loss as a function of frequency for annealed magnetic powder cores prepared by different coating processes
Table 2 Core loss of magnetic powder cores prepared by different coating processes at 20 mT and 100 kHz after annealing
Fig.13 Model images of FeSiCr magnetic particles filled by hydrophobic and coupling modified hydrophilic SiO₂

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