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Microstructure and properties of the Ba0.75−xCaxLa0.25Fe11.6Co0.25Ti0.15O19 hexaferrites

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Abstract

In the case of Ti4+ remain unchanged, the Ca2+ substituted Ba0.75−xCaxLa0.25Fe11.6Co0.25Ti0.15O19 (0 ≤ x ≤ 0.05) were prepared by conventional solid-state reaction method at temperature of 1280 °C. A ball-to-power weight ratio of 10:1. Their crystal structure and magnetic properties were mainly investigated. The results show that the single magnetoplumbite phase structure transformed into the multiphase structure. Meanwhile, the small amount of α-Fe2O3 phase existed in M-type phase. The micrographs were observed by a field emission scanning electron microscopy (SEM). Vibrating sample magnetometer (VSM) was used to analyze the magnetic properties. The saturation magnetization (M s ) first increases then decreases when x from 0 to 0.03. But, when x from 0.03 to 0.05, the saturation magnetization (M s ) first increases then decreases too. The maximum value is at x = 0.04 (M s  = 70.73 emu/g). The value of coercivity (H c ) first increases then decreases when x from 0 to 0.04. But, the value increased when x from 0.04 to 0.05. The maximum value is at x = 0.02 (H c  = 1691 Oe).

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 51472004, 51272003).

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Authors and Affiliations

  1. School of Physics and Materials Science, Anhui University, 111 Jiulong Road, Hefei, 230601, People’s Republic of China

    Xiangyu Meng, Xiansong Liu, Chaocheng Liu, Cong Zhang, Haohao Li & Khalid Mehmood Ur Rehman

  2. School of Physics & Materials Science, Engineering Technology Research Center of Magnetic Materials, Anhui University, Hefei, 230601, People’s Republic of China

    Xiansong Liu

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  1. Xiangyu Meng
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Correspondence to Xiansong Liu.

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Meng, X., Liu, X., Liu, C. et al. Microstructure and properties of the Ba0.75−xCaxLa0.25Fe11.6Co0.25Ti0.15O19 hexaferrites. J Mater Sci: Mater Electron 29, 881–886 (2018). https://doi.org/10.1007/s10854-017-7984-1

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