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Xiubin Zhao,Shuang Zhang,Jinsong Li,Ailin Xia,Yujie Yang 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.1
M-type ferrite Sr0.1Ca0.4La0.5Fe12O19 magnetic powders doped with CoxFe3-xO4 (0 ≤ x ≤ 1.25) in precursors were prepared bya ceramics process. The structure of specimens were examined by using an X-ray diffractometer. Only the magnetoplumbitephase was found in the specimens with the cobalt content (x) from 0.25 to 1.25 in precursor. The specimens exhibited a typicalhexagonal M-type structure and the particles in specimens were uniformly distributed in size. The specimen with x=1.25 hadthe maximum saturation magnetization of 67.48 emu/g, while the residual magnetization and the coercivity of the specimenwith x=1.00 reached the maximum value of 31.83 emu/g and 1270 Oe, respectively.
Xiubin Zhao,Ailin Xia 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.4
The M-type ferrite Sr0.1Ca0.4La0.5Fe12O19 magnetic powders with different ZnFe2O4 substitution amounts (Rm, 0, 1%, 3%, 5%,7%, and 9%) were obtained using a ceramic process. The structure of specimens were examined by using an X-raydiffractometer. All the specimens exhibited a typical single-phase hexagonal M-type structure, and the particles in specimenswere uniformly distributed in size. The VSM study indicated the specimen with Rm=9% had the maximum saturationmagnetization of 70.22 emu/g, and the residual magnetization and the coercivity of specimens increased firstly and decreasedlater with the increase of Rm. The specimen with Rm=3% exhibits the best comprehensive magnetic properties.
Structural, magnetic properties of nickel-substituted strontium W-type ferrites
Jinsong Li,Xiubin Zhao,Ailin Xia 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.5
Nickel substituted W-type strontium ferrites Sr0.9Ce0.1Zn2-xNixFe16O27 (x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) were prepared by aceramic method. The specimens exhibited a single-phase W-type structure when the Ni content (x) is 0 ≤ x ≤ 1. With theincreasing content of nickel dopant, the particles exhibited a hexagonal plate-like shape. The saturation magnetization andremanent magnetization increased x from 0.0 to 0.6, then decreased with x > 0.6. The coercivity of specimens increasedgradually for x ≤ 0.2 and then began to decrease from x = 0.3; the coercivity shows a downward trend with the Ni contentcontinuing to increase. Subsequently, as the Ni content increases, there is a downward trend compared to the unsubstitutedspecimens.