Microstructure and Magnetic Properties of Fe2W-type Ferrites BaFe2-x2+CoxFe163+O27 (x=0.0~0.8)

doi:10.11901/1005.3093.2020.098

Chinese Journal of Materials Research

2020, Vol. 34

Issue (12): 915-920 DOI: 10.11901/1005.3093.2020.098

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Microstructure and Magnetic Properties of Fe₂W-type Ferrites BaFe_2-_x²⁺Co_xFe₁₆³⁺O₂₇ (x=0.0~0.8)

TANG Jin¹(

), LI Dan², QIN Jianchun¹, ZENG Jishu¹, HE Hao¹, LI Yimin¹, LIU Chen¹

^1.Research Center of Materials Science and Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
^2.Center of Experimental Teaching for Common Courses, Panzhihua University, Panzhihua 617000, China

Cite this article:

TANG Jin, LI Dan, QIN Jianchun, ZENG Jishu, HE Hao, LI Yimin, LIU Chen. Microstructure and Magnetic Properties of Fe₂W-type Ferrites BaFe_2-_x²⁺Co_xFe₁₆³⁺O₂₇ (x=0.0~0.8). Chinese Journal of Materials Research, 2020, 34(12): 915-920.

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Abstract

Fe₂W-type ferrite BaFe_2-_x²⁺Co_xFe₁₆³⁺O₂₇(x=0.0~0.8) was prepared by solid phase method, and of which the microstructure and magnetic properties were characterized by means of X-ray diffractometer (XRD), scanning electron microscope (SEM), infrared spectrometer (FT-IR) and vibrating sample magnetometer (PPMS-VSM), as well as Reitveld fitting method. The results show that all samples are single phase BaFe_2-_x²⁺Co_xFe₁₆³⁺O₂₇without residual α-Fe₂O₃. The grain has a good hexagonal structure and the particle size distribution is uniform. Last but not least, the partial substitution of Co²⁺for^{Fe²⁺can significantly improve the saturation magnetization (M_s) at 300 K for Fe₂W-type ferrite BaFe_2-_x²⁺Co_xFe₁₆³⁺O₂₇.}

Key words: inorganic non-metallic materials Fe₂W type ferrite solid phase method microstructure magnetic properties

Received: 02 April 2020

ZTFLH:

TB321

Fund: National Natural Science Foundation of China(51872004);Guangxi Science and Technology Base and Special Talent(AD19245013);Ph. D. Fund of Guangxi University of Science and Technology(19Z29)

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	Jin TANG
	Dan LI
	Jianchun QIN
	Jishu ZENG
	Hao HE
	Yimin LI
	Chen LIU

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https://www.cjmr.org/EN/10.11901/1005.3093.2020.098 OR https://www.cjmr.org/EN/Y2020/V34/I12/915

Table 1 Quality of reagent to prepare BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇ sample (g)

Fig.1 X-ray diffraction patterns of hexagonal ferrite BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇ (x=0.0, 0.2, 0.4, 0.6, 0.8) magnetic powders

Fig.2 Refined XRD pattern for BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇ (x=0.0, 0.2, 0.6, 0.8) hexaferrites

Fig.3 Representative SEM morphology for BaCo_xFe_2-_x²⁺-Fe₁₆³⁺O₂₇ magnets samples with Co concentration of x=0.6

Table 2 Different parameters were calculated for BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇containing different Co content according to XRD data

Fig.4 FT-IR spectra for BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇(x=0.0~0.8) with the wave number in the range of 4000~400 cm^-1

Fig.5 Representative hysteresis loops of the W-type hexaferrite BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇ for compositions of (a) x=0.0, (b) x=0.8

Table 3 M_s and H_c for Co substituted Fe₂W hexaferrites BaCo_xFe_2-_x²⁺Fe₁₆³⁺O₂₇ (x=0.0~0.8) at 3 K and 300 K

Fig.6 Variation of H_c and M_s for Co substituted Fe₂W hexaferrites (x=0.0~0.8) at 3 K and 300 K, respec-tively

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