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A comparative study of microstructure, magnetic, and electromagnetic properties of Zn2W hexaferrite prepared by sol–gel and solid-state reaction methods

  • Original Paper: Sol-gel and hybrid materials for dielectric, electronic, magnetic and ferroelectric applications
  • Published:
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Abstract

In this work, Zn2W hexaferrite was prepared by sol–gel (SG) and solid-state reaction (SSR) methods. The dependency of the microstructure, magnetic, and electromagnetic properties of the obtained Zn2W hexaferrite on the two different preparation methods and the sintering temperature was investigated. First, single-phase Zn2W hexaferrite was obtained by the SG method at sintering temperatures higher than 1250 °C, but this was not the case with the SSR method. Second, the Zn2W hexaferrite prepared by the SG method had a larger grain size than those prepared by the SSR method under the same sintering conditions due to the higher activity of the obtained nanosized precursor powder. Third, the saturation magnetization obtained the highest value herein of 77.48 emu/g from the Zn2W hexaferrite prepared by the SG method sintered at 1250 °C, which is higher than the value of 72.49 emu/g from the Zn2W hexaferrite prepared by the SSR method sintered at 1300 °C. Finally, the values of reflection losses reached a maximum of 22.4 dB at 17.0 GHz with the bandwidth of 0.87 GHz over 10 and 29.5 dB at 17.9 GHz with around the bandwidth of 1.38 GHz for the hexaferrite prepared by the SG method and SSR methods, respectively, which meets the absorption requirement for high-frequency microwave applications.

Influence of the preparation methods of SG and SSR on the properties of prepared Zn2W hexaferrites was researched. In virtue of the higher purity and crystal activity, the samples prepared by the SG method had better magnetic properties. In terms of absorption property, the samples prepared by SSR have broader bandwidth and higher values of reflection losses.

Highlights

  • The excellent microwave material Zn2W(BaZn2Fe16O27) with single phase are obtained successfully.

  • Comparison of microstructure, phase purity and magnetic properties of samples prepared by sol-gel and solid-state reaction methods.

  • The obatained samples has important applications in high frequency with excellent electromagnetic and absorbing properties.

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Funding

This work is funded by the National Natural Science Foundation of China (Grant No. 51702075 and 51771176) and National Key Research and Development Project (Grant No. 2019YFF0217205).

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Authors and Affiliations

  1. Department of Electronics Science and Technology, Laboratory for Nanoelectronics and NanoDevices, Hangzhou Dianzi University, Hangzhou, 310018, China

    Lining Fan, Hui Zheng, Xuehai Zhou, Hongbo Zhang, Peng Zheng, Liang Zheng & Yang Zhang

  2. Magnetism Key Laboratory of Zhejiang province, China Jiliang University, Hangzhou, 310018, China

    Qiong Wu

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  1. Lining Fan
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  2. Hui Zheng
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Correspondence to Hui Zheng.

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Fan, L., Zheng, H., Zhou, X. et al. A comparative study of microstructure, magnetic, and electromagnetic properties of Zn2W hexaferrite prepared by sol–gel and solid-state reaction methods. J Sol-Gel Sci Technol 96, 604–613 (2020). https://doi.org/10.1007/s10971-020-05364-2

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  • DOI: https://doi.org/10.1007/s10971-020-05364-2

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