Study of the structural, magnetic, and microwave absorption properties of the simultaneous substitution of several cations in the barium hexaferrite structure

Nikmanesh, Hossein; Hoghoghifard, Sedigheh; Hadi-Sichani, Behnaz

doi:10.1016/j.jallcom.2018.10.051

Cited by 104 publications

(36 citation statements)

References 44 publications

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“…Figure 1 illustrates the measurement results of the X-ray diffraction pattern (XRD) of the barium hexagonal ferrite sample substitution of La 3+ (Ba1-xLaxFe12O19) are shown for x = 0 -0.7. The Match program analysis showed that barium hexaferrite phases existed in all samples [18]. The XRD patterns of all samples correspond strongly to JCPDS data ref: 00-043-0002.…”

Section: Resultssupporting

confidence: 66%

“…One way to reduce the barium hexagonal ferrite anisotropy is to substitute it with different metal elements, especially metals that have high permittivity. Several researchers have developed different compositions of BaFe12O19, which are substituted by different metallic elements for microwave absorption [15][16][17][18][19]. However, in this study, the substitution of rare earth metal La has been carried out as La has magnetic permeability in the transition configuration in group f and is a dielectric material that has a relatively good permittivity [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Effect of La-Substituted Barium Hexaferrite on the Structural Characteristics and Magnetic Properties for Microwave Absorbing Material

Taryana

Sarwanto²,

Adi³

2021

JMA

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Ba1-xLaxFe12O19 with ion substitution La3+ (x = 0 – 0.7) has been produced via the mechanical milling technique of the solid reaction method. Considering that Ba1-xLaxFe12O19 is expected to be used as a microwave absorbent, it is necessary to characterize its structural and magnetic features. The refinement results of the X-ray diffraction (XRD) data show that a single-phase hexagonal structure (space group P63/mmc) is obtained for x = 0 and x = 1, while for the composition of x 0.1 is multiphase. The lattice parameters and crystal volume decreased, whereas the lattice strain was found to advance with increasing La substitution in the sample. For x = 0.1, the crystallite size is constant while the lattice strain increases. Employing a scanning electron microscope (SEM), the observation of particle morphology shows that the single-phase (x = 0 and x = 0.1) has a comparably unvarying particle size circulation, while for x 0.1, different particle shapes and sizes are found. The saturation magnetization raises while the coercivity field reduces due to the substitution of La for x = 0.1. Furthermore, for x 0.1, the saturation magnetization decreases while the coercivity field increases.

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Section: Resultssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Effect of La-Substituted Barium Hexaferrite on the Structural Characteristics and Magnetic Properties for Microwave Absorbing Material

Taryana

Sarwanto²,

Adi³

2021

JMA

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“…The M-type hexaferrites, especially barium hexaferrite (BaFe 12 O 19 ), have been intensively studied and implemented as permanent magnets due to their high intrinsic coercivity (H c ), large crystalline anisotropy, high chemical stability, and low cost. Properties of barium hexaferrites at high frequencies were implemented in microwave absorbers [ 2 , 3 ]. Their incorporations into polymer composites were investigated to improve forming and mechanical properties [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis

et al. 2021

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The copper (Cu) substitution in barium hexaferrite (BaFe12O19) crystals from the sol-gel auto-combustion synthesis is demonstrated as a cost-effective pathway to achieve alterable magnetic properties. Subsequent heat treatments at 450 °C and 1050 °C result in irregularly shaped nanoparticles characterized as the M-type BaFe12O19 with the secondary phase of hematite (α-Fe2O3). Despite the mixed phase, the substantial coercivity of 2626 Oe and magnetization as high as 74.8 emu/g are obtained in this undoped ferrite. The copper (Cu) doing strongly affects morphology and magnetic properties of BaFe12−xCuxO19 (x = 0.1, 0.3, and 0.5). The majority of particles become microrods for x = 0.1 and microplates in the case of x = 0.3 and 0.5. The coercivity and magnetization tend to reduce as Cu2+ increasingly substitutes Fe3+. From these findings, magnetic properties for various applications in microwave absorbers, recording media, electrodes, and permanent magnets can be tailored by the partial substitution in hexaferrite crystals.

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“…The value of ' remain nearly constant for low content samples and show no signi cant variation with frequency and then the real part of permeability increase. Value of " increases with increasing substitution (Nikmanesh et al, 2019). The addition of media extract can increase the permittivity and permeability value of BaFe 12 O 19 .…”

Section: Effectiveness Of Media Extract In Bafe 12 O 19 As Electromagnetic Wave Absorptionmentioning

confidence: 95%

Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

Edianta

Fauzi

Naibaho

et al. 2021

sci. technol. indones.

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Betel leaf is a typical Indonesian herbal plant that propagates on other tree trunks. So far, betel leaf has only been used in biomedicine and traditional medicine, whereas the chemical compounds of betel leaf can be used to absorb electromagnetic waves. In this mini-review, we review several research results to discuss the potential effectiveness of betel leaf in barium hexaferrite as an absorber of electromagnetic radiation. We compiled this mini-review based on the literature review method that is discussed extensively and in-depth regarding the chemical composition of betel leaf, modification of the development of barium hexaferrite material with betel leaf media extract, characteristics of BaFe12O19 as absorption of electromagnetic waves, and the effectiveness of media extracts in BaFe12O19 as absorption of electromagnetic waves. Based on the results of the literature review, the modification of BaFe12O19 material synthesis can include microemulsion, solid-state, coprecipitation, sol-gel, and hydrothermal synthesis. So far, hydrothermal synthesis is a synthesis method of mixing betel leaf extract media and ferrite-based magnets that have been studied before. Betel leaf in ferrite-based magnetic materials has been studied not to damage the surface morphology and characteristics of the magnetic material. The results of the assessment also show the effectiveness of adding other elements or compounds such as Ni, Al2O3, and composites in ferrite-based magnetic materials that can absorb more than 90% of electromagnetic waves in the frequency range 2-18 GHz.

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Study of the structural, magnetic, and microwave absorption properties of the simultaneous substitution of several cations in the barium hexaferrite structure

Cited by 104 publications

References 44 publications

Effect of La-Substituted Barium Hexaferrite on the Structural Characteristics and Magnetic Properties for Microwave Absorbing Material

Effect of La-Substituted Barium Hexaferrite on the Structural Characteristics and Magnetic Properties for Microwave Absorbing Material

Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis

Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

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