Ba1−xLaxFe12O19 (x = 0.0, 0.2, 0.4, 0.6) hollow microspheres: material parameters, magnetic and microwave absorbing properties

Hongfei, Lou; Lu, Xuliang; Pan, Yingtian; Wang, Xuejin; Wang, Jianjiang; Sun, Shengyong; He, Chao; Song, Qingfeng

doi:10.1007/s10854-016-5243-5

Cited by 19 publications

(4 citation statements)

References 32 publications

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“…13 For instance, Lou et al used La 3+ doped barium ferrite. 14 The results demonstrate that an appropriate amount of doping will improve the dielectric constant. Optimal RL increased by about 40%.…”

Section: Introductionmentioning

confidence: 89%

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Facile synthesis of La‐doped cobalt ferrite@glucose‐based carbon composite as effective multiband microwave absorber

et al. 2021

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C/CoLaxFe2−xO4 (with x = 0.1, 0.2, 0.3) composites were compounded by using a high‐temperature hydrolysis. X‐ray Diffraction (XRD) and X‐ray Photoelectron Spectroscopy (XPS) results show that doping of La ions does not alter the spinel crystal structure and partially replaces Fe ions. Results of Field‐Emission Scanning Electron Microscope (FESEM) and Energy Dispersive Spectroscopy (EDS) mapping prove that with the doping of La ions, the grains are refined, and the carbon shell on the surface exists. The effect of doping of La ions on microwave absorption performance of the composites was systematically studied. It is found that an optimal reflection loss (RL) of −49.56 dB is achieved at 4.96 GHz, as the composition is C/CoLa0.2Fe1.8O4. Meanwhile, the sample C/CoLa0.3Fe1.7O4 shows excellent effective absorption bandwidth. Specifically, when the matching thicknesses are 4 and 5 mm, the effective absorption bandwidth is 4 GHz, covering the C band and Ku band, thus realizing multiband absorption. The synergistic effects of the enhanced dipole polarization related to the doping of La ions, improved interface polarization of the core‐shell structure, and the magnetic loss originated from CoLaxFe2−xO4 are responsible for the optimal microwave absorption performance. Therefore, this C/CoLaxFe2−xO4 composite material has the prospect of a multiband high‐efficiency microwave absorber.

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Section: Introductionmentioning

confidence: 89%

“…Excellent microwave properties and electronic structure of rare earth elements can be used to dope ferrites in order to enhance their microwave absorption performance 13 . For instance, Lou et al used La 3+ doped barium ferrite 14 . The results demonstrate that an appropriate amount of doping will improve the dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of La‐doped cobalt ferrite@glucose‐based carbon composite as effective multiband microwave absorber

et al. 2021

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“…Rehman K M U et al reported the magnetic properties of cerium substituted Barium hexaferrites [16] Hong. F lou et al have synthesized the Lanthanum doped Barium hexaferrites and found enhanced magnetic properties [17]. Sunil kumar et al has reported the effect of Lanthanum doping and Calcium doping on the Barium hexaferrites (BHF) with the improved dielectric and magnetic properties [18,19].…”

Section: Introductionmentioning

confidence: 99%

Structural, morphological, dielectric and magnetic properties of Ba_1−xCr_xFe₁₂O₁₉ M type hexaferrites

et al. 2021

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Chromium doped M-type hexaferrites having composition Ba1−xCrxFe12O19 at x = (0.0,0.1,0.2,0.3,0.4,0.5) were fabricated by sol-gel auto combustion technique. XRD technique was performed to confirm the phase formation. Morphology of the prepared samples was analyzed through scanning electron microscopy (SEM) and it indicated the hexagonal platelet structure. Lattice parameters, crystallite size and cell volume were found to decrease with the increase of doping (Cr3+) concentration. Saturation magnetization and magneto crystalline anisotropy has been investigated through law of approach to the saturation magnetization. Saturation magnetization first increases and reaches to maximum at x = 0.3 for Cr3+ substituted Barium hexaferrite. Dielectric constant, dielectric loss tangent loss, ac conductivity and Q values of the prepared samples were also discussed. Dielectric constant increases gradually with increasing dopant (Cr3+) concentration. These parameters were found to be appropriate for high frequency applications such as modulators, phase shifter and also in magnetic recording media.

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“…Interest to barium hexaferrite has remained high for 60 years because of the unique magnetic properties and the possibility of its tuning by doping. Alloying of the composition allows, in particular, to change the degree of uniaxial magnetic anisotropy, the magnitude of the coercive force, saturation magnetisation, Curie temperature [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Ba-Fe-O System near the BaFe<sub>12</sub>O<sub>19</sub>

Винник

Trofimov

Жеребцов

2017

SSP

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This article presents an investigation on phase equilibria of barium hexaferrite and neighboring phases near its melting point and on the characteristics of the compounds in the vicinity of BaFe12O19 phase. Fe3O4, BaFe22+Fe163+O27 (W type), BaFe2+Fe143+O23 (X type), BaFe12O19 (M type), Ba2Fe22+Fe123+O22 (Y type), Ba3Fe22+Fe243+O41 (Z type) and BaFe2O4 (S type) were detected in the molten and solidified stoichiometric BaFe12O19. Literature data are summarized and compared with results of the present work.

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Ba1−xLaxFe12O19 (x = 0.0, 0.2, 0.4, 0.6) hollow microspheres: material parameters, magnetic and microwave absorbing properties

Cited by 19 publications

References 32 publications

Facile synthesis of La‐doped cobalt ferrite@glucose‐based carbon composite as effective multiband microwave absorber

Facile synthesis of La‐doped cobalt ferrite@glucose‐based carbon composite as effective multiband microwave absorber

Structural, morphological, dielectric and magnetic properties of Ba_1−xCr_xFe₁₂O₁₉ M type hexaferrites

Investigation of Ba-Fe-O System near the BaFe<sub>12</sub>O<sub>19</sub>

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Ba1−xLaxFe12O19 (x = 0.0, 0.2, 0.4, 0.6) hollow microspheres: material parameters, magnetic and microwave absorbing properties

Cited by 19 publications

References 32 publications

Facile synthesis of La‐doped cobalt ferrite@glucose‐based carbon composite as effective multiband microwave absorber

Facile synthesis of La‐doped cobalt ferrite@glucose‐based carbon composite as effective multiband microwave absorber

Structural, morphological, dielectric and magnetic properties of Ba1−xCrxFe12O19 M type hexaferrites

Investigation of Ba-Fe-O System near the BaFe<sub>12</sub>O<sub>19</sub>

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Structural, morphological, dielectric and magnetic properties of Ba_1−xCr_xFe₁₂O₁₉ M type hexaferrites