成分调节对软磁<strong>MnZn</strong>铁氧体结构和磁性的影响

doi:10.11901/1005.3093.2024.193

材料研究学报

2025, Vol. 39

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

研究论文

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成分调节对软磁MnZn铁氧体结构和磁性的影响

徐展源¹(

), 赵伟², 史湘石¹, 张振宇¹, 王中钢¹, 韩勇³, 范景莲³

1 中南大学交通运输工程学院长沙 410075
2 湖南华曙高科技股份有限公司长沙 410006
3 中南大学粉末冶金国家重点实验室长沙 410083

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

引用本文:

徐展源, 赵伟, 史湘石, 张振宇, 王中钢, 韩勇, 范景莲. 成分调节对软磁MnZn铁氧体结构和磁性的影响[J]. 材料研究学报, 2025, 39(1): 55-62.
Zhanyuan XU, Wei ZHAO, Xiangshi SHI, Zhenyu ZHANG, Zhonggang WANG, Yong HAN, Jinglian FAN. Effect of Composition Adjustment on Structure and Magnetic Properties of Soft Magnetic MnZn Ferrites[J]. Chinese Journal of Materials Research, 2025, 39(1): 55-62.

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摘要:

用“化学溶胶-喷雾干燥-煅烧”方法制备软磁MnZn铁氧体Mn_{1 -}_x Zn _x Fe₂O₄ (x = 0.1，0.3，0.5，0.7，0.9)粉末，使用X射线衍射(XRD)、红外光谱(FTIR)、拉曼光谱(Raman)、X射线光电子能谱(XPS)、扫描电镜(SEM)、透射电镜(TEM)和超导量子干涉磁测量系统等手段表征其物相组成、显微结构和磁性能等，研究了成分对其结构和磁性的影响。结果表明，当Mn_{1 -}_x Zn _x Fe₂O₄的x大于或等于0.5时，制备出的是单相MnZn铁氧体粉末，x小于0.5时则出现杂质相α-Fe₂O₃。随着x的增大(即Zn含量的提高)，MnZn铁氧体的晶格常数先减小后增大最后减小，其两个FTIR吸收峰均单调红移，Raman谱中的峰强度提高。MnZn铁氧体样品中的Fe为+3价、Zn为+2价，而Mn则有+2、+3和+4三种价态。铁氧体粉末样品呈空心球壳形貌，没有异常长大的颗粒。随着Zn含量的提高，MnZn铁氧体的饱和磁化强度(M_s)单调递减(x = 0.5除外)。x = 0.5的MnZn铁氧体(Mn_0.5Zn_0.5Fe₂O₄)综合性能最优。

关键词 ：无机非金属材料, Zn含量, 化学溶胶-喷雾干燥-煅烧, MnZn铁氧体, 磁性能, 软磁

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

收稿日期: 2024-05-07

ZTFLH:

TB32

基金资助:国家重点研发计划(2022YFB4300101);中南大学博士后科研启动费(140050022)

通讯作者: 徐展源，xu201230071633@163.com，研究方向为粉末冶金材料

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

作者简介: 徐展源，男，1990年生，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.193 或 https://www.cjmr.org/CN/Y2025/V39/I1/55

图1 不同Zn含量粉末样品的XRD谱

表1 不同Zn含量粉末样品的平均晶粒尺寸和晶格常数

图2 不同Zn含量粉末样品的FTIR谱

图3 不同Zn含量粉末样品的Raman谱

图4 不同Zn含量粉末样品的XPS谱

图5 不同Zn含量粉末样品的SEM照片

图6 不同Zn含量粉末样品的明场像和高分辨图像

图7 不同Zn含量粉末样品的磁滞回线

表2 不同Zn含量粉末样品的磁性参数

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