Flexible Ferrite Magnetic Composite Films for Electromagnetic Applications
Jui-Yang Hsu, Chih-Huang Lai, Chia-Chen Li
TL;DR
Flexible magnetic films with improved performance are created by modifying ferrite particles and adding FeNi alloy, promising for advanced electronic applications.
Contribution
A novel composite film with enhanced magnetic properties through surface modification and FeNi alloy integration is developed.
Findings
Surface modification with SiO2 and silane improves particle dispersion and magnetic anisotropy.
Adding FeNi alloy particles increases saturation magnetization and permeability.
Hybrid films show improved inductance and quality factor for inductor applications.
Abstract
Anisotropic magnetic composite films composed of MnZn ferrite powders embedded in an epoxy matrix are investigated for flexible thin-film inductor applications. Commercial MnZn ferrites typically contain α-Fe2O3 impurities that impair magnetic performance; in this study, these impurities are effectively eliminated by thermal annealing at 600 °C under argon. To improve particle dispersion and processability within the composite, the ferrite is surface-modified with 3-glycidoxypropyltrimethoxysilane and coated with SiO2, yielding a more dispersible MZ@SiO2. This treatment enables the formation of well-aligned particle chains under an external magnetic field, resulting in pronounced magnetic anisotropy and stable permeability. Incorporating FeNi alloy particles into the MZ@SiO2-based films further increases saturation magnetization and permeability, though finite element simulations…
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Taxonomy
TopicsElectromagnetic wave absorption materials · Magnetic Properties and Synthesis of Ferrites · Metallic Glasses and Amorphous Alloys