Crystal structure and magnetic properties study on barium hexaferrite of different average crystallite size

Manglam, Murli Kumar; Kumari, Suman; Mallick, Jyotirekha; Kar, Manoranjan

doi:10.1007/s00339-020-04232-8

Cited by 48 publications

(17 citation statements)

References 35 publications

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“…The synthesized MAG (Fe 3 O 4 ) and BF (BaFe 12 O 19 ) particles were confirmed by their respective peaks shown in the XRD patterns in Figure b. The BaFe 12 O 19 diffraction peaks were found at 2θ = 18.03 (101), 19.24 (102), 23.21 (006), 27.99 (100), 30.59 (110), 32.42 (107), 34.37 (114), 35.43 (201), 37.33 (203), 40.57 (205), 42.68 (206), 46.79 (1011), 50.49 (209), 54.14 (2010), 55.31 (217), and 56.76 (2011) . The MAG pattern shows peaks at 2θ = 18.5 (111), 30.35 (220), 35.69 (311), 43.31 (400), 53.67 (422), and 57.41 (511) .…”

Section: Resultsmentioning

confidence: 65%

“…The BaFe 12 O 19 diffraction peaks were found at 2θ = 18.03 (101), 19.24 (102), 23.21 (006), 27.99 (100), 30.59 (110), 32.42 (107), 34.37 (114), 35.43 (201), 37.33 (203), 40.57 (205), 42.68 (206), 46.79 (1011), 50.49 (209), 54.14 (2010), 55.31 (217), and 56.76 (2011). 57 The MAG pattern shows peaks at 2θ = 18.5 (111), 30.35 (220), 35.69 (311), 43.31 (400), 53.67 (422), and 57.41 (511). 58 Both patterns agree with the standard XRD pattern COD card number of BF [00-100-8328] and MAG [00-900-5815].…”

Section: Resultsmentioning

confidence: 99%

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Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

et al. 2023

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The developed nanocomposite exhibits significantly enhanced shielding performance due to the synergistic effect of high dielectric and magnetic loss materials, which modifies the material's impedance and improves its absorption ability. Different weight percentages (0, 1, 5, 10, 15, 20, and 25 wt %) of thermally treated chemically reduced graphene oxide (TCRGO) were combined with two types of magnets, barium hexaferrite (BF) and magnetite (MAG), using a dry powder compaction technique to produce binary ceramic nanocomposite sheets. The shielding performance of a 1 mm thick compressed nanoceramic sheet over the X-band was evaluated using a vector network analyzer. The 25% TCRGO showed high shielding performance for both BF and MAG, while BF had a total shielding efficiency (SET) that exceeded MAG by 130%. The SET of 25 wt % TCRGO/BF was 52 dB, with a 41 dB absorption shielding efficiency (SEA). Additionally, the effect of different levels of incident electromagnetic wave power (0.001−1000 mW) at various thicknesses (1, 2, and 5 mm) was explored. At 1000 mW, the 5 mm TCRGO/BF had an SET of 99 dB, an SEA of 91 dB, and a reflection shielding efficiency (SER) of 8 dB. The use of BF as a hard magnet paired with TCRGO exhibited excellent and stable electromagnetic shielding performance.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

et al. 2023

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“…Where, the observed data is shown by a black solid circle, the calculated intensities by a red solid line, the Bragg's positions by vertical pink lines, and the bottom blue lines represents the difference between observed and calculated intensities. The successful Rietveld refinement is dependent on the peaks shape, the refinement results are not successful if peaks are not correctly described (Manglam, Kumari, Mallick, & Kar, 2021). However, the data we have well-resolved peaks in the diffraction pattern, where observed and calculated intensities are matching to each other, and also well matched with JCPDS card number 00-027-1029, which confirm the formation of BHF nanoparticles.…”

Section: Xrd Analysismentioning

confidence: 70%

Doping Effect and Microstructure Behavior of Rare-Earth Element Cerium (Ce+3) in Barium Hexaferrite (BaCexFe12-xO19) Nanoparticles

Gilani¹,

Ahmed²,

Asghar³

et al. 2020

J. Mat. Phy.

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Cerium substituted BaM hexaferrites BaCexFe12-xO19 (x = 0.0, 0.25, 0.5, 0.75, and 1.0) nano crystallites were synthesized via Sol-gel method. The x-ray diffraction (XRD) patterns were analyzed by Rietveld refinement which confirms the formation of hexagonal structure. The crystalline size was calculated by Debye Scherrer method, W–H method and SSP method. The lattice constant ? found to decrease, this was due to the octahedral site replacing a large radius of Ce3+ ion with a smaller radius Fe3+ ion, While the lattice constant c found increase. The x-ray density observed increases with increasing Ce3+ concentration. Fourier transform infrared spectroscopy (FTIR) confirmed the two frequency bands n1 tetrahedral site and n2 octahedral site in a range between 400–620 cm-1. Impedance analyzer was used to investigate the dielectric properties in a range of 1 MHz – 3 GHz following Maxwell Wagner model. Dielectric constant showed decreasing trend while dielectric loss showed dispersive behavior by increasing frequency and same was that with tangent loss, such behavior was due to Koop's phenomenological theory. AC conductivity exhibits a plane behavior in a low frequency, while dispersive in high frequency. Such behavior was due to grain effect at high frequency. Impedance showed continuous action at high frequency, which is attributed to the release of space charges. The real and imaginary modulus showed variation by increasing frequency, which was due to the occurrence of relaxation phenomenon. As per dielectric research, these ferrites can be utilized in high frequency devices, microwave technologies, and semiconductor devices.

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“…The advantages of barium hexaferrite (BaFe 12 O 19 , i.e., BHF) include a high saturation magnetization value of 72 A m 2 kg −1 , a large coercive eld of 594 kA m −1 , a high Curie temperature of 450 °C, satisfactory corrosion resistance, and chemical stability. 12 However, BaFe 12 O 19 suffers weaknesses as an absorber, namely with respect to its high density, narrow absorption band, and high reection loss. Its permittivity and permeability considerably differ, resulting in impedance mismatching, which results in a nonideal EM absorption performance.…”

Section: Introductionmentioning

confidence: 99%

“…12 O 19 in molten salt began with the stoichiometric mixing of BaCO 3 , Fe 2 O 3 , and NaCl at a BaFe 12 -O 19 : NaCl mass ratio of 1 : 2. The precursors were milled at 150 rpm in a planetary ball for 2 h in an ethanol medium.…”

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confidence: 99%

High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe₁₂O₁₉@MnO₂ core–shell composites

Yustanti,

Noviyanto,

Ikramullah

et al. 2023

RSC Adv.

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Crystal structure and magnetic properties study on barium hexaferrite of different average crystallite size

Cited by 48 publications

References 35 publications

Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

Doping Effect and Microstructure Behavior of Rare-Earth Element Cerium (Ce+3) in Barium Hexaferrite (BaCexFe12-xO19) Nanoparticles

High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe₁₂O₁₉@MnO₂ core–shell composites

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Crystal structure and magnetic properties study on barium hexaferrite of different average crystallite size

Cited by 48 publications

References 35 publications

Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

Doping Effect and Microstructure Behavior of Rare-Earth Element Cerium (Ce+3) in Barium Hexaferrite (BaCexFe12-xO19) Nanoparticles

High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe12O19@MnO2 core–shell composites

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High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe₁₂O₁₉@MnO₂ core–shell composites