Effect of Composition Adjustment on Structure and Magnetic Properties of Soft Magnetic MnZn Ferrites

doi:10.11901/1005.3093.2024.193

Chinese Journal of Materials Research

2025, Vol. 39

Issue (1): 55-62 DOI: 10.11901/1005.3093.2024.193

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Effect of Composition Adjustment on Structure and Magnetic Properties of Soft Magnetic MnZn Ferrites

XU Zhanyuan¹(

), ZHAO Wei², SHI Xiangshi¹, ZHANG Zhenyu¹, WANG Zhonggang¹, HAN Yong³, FAN Jinglian³

1 School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China
2 Farsoon Technologies Company Limited, Changsha 410006, China
3 State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Cite this article:

XU Zhanyuan, ZHAO Wei, SHI Xiangshi, ZHANG Zhenyu, WANG Zhonggang, HAN Yong, FAN Jinglian. Effect of Composition Adjustment on Structure and Magnetic Properties of Soft Magnetic MnZn Ferrites. Chinese Journal of Materials Research, 2025, 39(1): 55-62.

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Abstract

The Mn_{1 -}_x Zn _x Fe₂O₄ (x = 0.1, 0.3, 0.5, 0.7, 0.9) powder materials were prepared by the “chemical sol-spray drying-calcination” method. The prepared powders were characterized by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, X-ray photon-electron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscopy (TEM), and superconducting quantum interference magnetic measurement system, in terms of phase composition, microstructure and magnetic properties etc. The results indicated that when the Zn concentration was x = 0.5 or above, MnZn ferrite powders of single-phase can be obtained. When the Zn concentration was below x = 0.5, impurity α-Fe₂O₃-phase will appear. The lattice constant of MnZn ferrite phase showed a trend of first decreasing, then increasing, and finally decreasing again with the increasing Zn concentration. As the Zn concentration increased, the FTIR absorption peaks of MnZn ferrite phase showed monotonically red shift. The intensity of Raman peaks increased with the increase of Zn concentration. The valences of Fe and Zn were +3 and +2, while Mn exhibits different valence states, with +2, +3, and +4 valences. The prepared powders all presented hollow spherical shell morphology, with no abnormally large particles observed. With the increase of Zn concentration, the variation range of the saturation magnetization (M_s) 8.99~55.87 emu/g, the remanence (M_r) 0.24~6.50 emu/g, the coercivity (H_c) 28.03~107.63 Oe, and the squareness ratio (M_r/M_s) 0.02~0.12, while the saturation magnetization (M_s) decreased monotonically (except for x = 0.5). Furthermore, when the Zn concentration was x = 0.5, the comprehensive characteristics of MnZn ferrite are optimal.

Key words: inorganic non-metallic materials zinc concentration chemical sol-spray drying-calcination MnZn ferrite magnetic properties soft magnetic

Received: 07 May 2024

ZTFLH:

TB32

Fund: National Key Research and Development Project(2022YFB4300101);Postdoctoral Research Initiation Project Supported by Central South University(140050022)

Corresponding Authors: XU Zhanyuan, Tel: (0731)81890908, E-mail: xu201230071633@163.com

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	XU Zhanyuan
	ZHAO Wei
	SHI Xiangshi
	ZHANG Zhenyu
	WANG Zhonggang
	HAN Yong
	FAN Jinglian

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https://www.cjmr.org/EN/10.11901/1005.3093.2024.193 OR https://www.cjmr.org/EN/Y2025/V39/I1/55

Fig.1 XRD patterns of powders with different zinc concentration

Table 1 Average crystallite size and lattice parameters of powders with different zinc concentration

Fig.2 FTIR spectra of powders with different zinc concentration

Fig.3 Raman spectra of powders with different zinc concentration

Fig.4 XPS spectra of powders with different zinc concentration (a~d) x = 0.3, (e~h) x = 0.9

Fig.5 SEM images of powders with different zinc concentration
(a) x = 0.1, (b) x = 0.3, (c) x = 0.5, (d) x = 0.7, (e) x = 0.9

Fig.6 Bright field images and high resolution images of powders with different zinc concentration (a~d) x = 0.3, (e, f) x = 0.9

Fig.7 Hysteresis loops of powders with different zinc concentration

Table 2 Magnetic parameters of powders with different zinc concentration

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