Comparison of Magnetic Properties of Zn-doped Z-type Ferrite Prepared by Solid State and SGC Methods

ZHAO Junhao; LI Wei; LI Qifan; WANG Mengqi

doi:10.19554/j.cnki.1001-3563.2025.17.033

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (17) : 314-322. DOI: 10.19554/j.cnki.1001-3563.2025.17.033

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Comparison of Magnetic Properties of Zn-doped Z-type Ferrite Prepared by Solid State and SGC Methods

ZHAO Junhao^1a,1b, LI Wei^1b,2,*, LI Qifan^2,3, WANG Mengqi^1b,2

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Abstract

The work aims to improve the magnetic permeability of Co₂Z-type ferrites by different fabrication methods and explore the general law and affecting factors of their natural resonance peaks changing with Zn content. Zn-doped Co₂Z-type ferrites were prepared via solid state method and SGC method respectively under similar process conditions. The samples were systematically compared in terms of grain morphology, phase composition, static magnetic properties, and permeability. The ferrites synthesized by SGC method, calcined at 1 240  °C for only 5  hours, exhibited a pure Z phase and achieved a maximum imaginary permeability of 1.27 near 2.1  GHz—approximately 72% higher than that of the solid state counterpart calcined at the same temperature for 10  hours. Furthermore, when the resonance peaks of the solid state samples exhibited abrupt and discontinuous shifts with varying Zn content, those of the SGC samples changed in a smoother and more continuous manner. This study demonstrates that replacing the solid state method with the SGC method yields purer Co₂Z phases and significantly enhances the magnetic properties in the target frequency band within shorter sintering time. The divergence in the resonance peak variations between the two methods is primarily attributed to differences in the amount of W-phase present. The variation in the easy magnetization direction and the effect of the W-phase contribute to discontinuous variations in the resonance peaks observed in solid state samples.

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sol-gel self-propagating combustion method / solid state reaction method / zinc doping / hexaferrites / natural resonance

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ZHAO Junhao, LI Wei, LI Qifan, WANG Mengqi. Comparison of Magnetic Properties of Zn-doped Z-type Ferrite Prepared by Solid State and SGC Methods[J]. Packaging Engineering. 2025, 46(17): 314-322 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.033

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