Design and development of Ga-substituted Z-type hexaferrites for microwave absorber applications: Mössbauer, static and dynamic properties

Dhruv, Preksha N.; Pullar, Robert C.; Singh, Charanjeet; Carvalho, Francisco E.; Jotania, Rajshree B.; Meena, Sher Singh; Singh, Jasbir

doi:10.1016/j.ceramint.2020.08.231

Cited by 51 publications

(8 citation statements)

References 89 publications

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“…Composites of Ba 3 Co 2 Fe 24 O 41 also did not reach the RL and EAB values of our samples 58,59 . The microwave absorption performances of our samples were also better than doped‐Sr 3 Co 2 Fe 24 O 41 samples 26,27,60 …”

Section: Resultsmentioning

confidence: 57%

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Enhanced microwave absorption features of Ba₃Co₂Fe₂₄O₄₁ hexaferrite by high lanthanium doping concentration

et al. 2022

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Controlling material structure and its electromagnetic properties, including complex permittivity and permeability, could enhance the microwave absorption performance of the material in terms of reflection loss and effective absorption bandwidth. In this study, La-substituted barium hexaferrite, Ba 3−x La x Co 2 Fe 24 O 41 (x = 0, 0.1, 0.3, and 0.5) compounds were successfully prepared using the solid-state reaction method, and their corresponding microstructures, static magnetic properties, and electromagnetic features in 2-18 GHz were investigated. The doping of La content increased saturation magnetization, coercivity, and remnant magnetization. The Ba 2.7 La 0.3 Co 2 Fe 24 O 41 epoxied sample with 3.5 mm thickness possessed an excellent microwave absorption of −47.3 dB at 3.52 GHz, and its corresponding effective absorption bandwidths were 3.75 GHz (2.25-6 GHz) and 0.57 . It is shown that doping with various La concentrations on Ba 3 Co 2 Fe 24 O 41 can be used as an effective technique to tune the performance of microwave absorbers based on barium hexaferrite.

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Section: Resultsmentioning

confidence: 57%

“…58,59 The microwave absorption performances of our samples were also better than doped-Sr 3 Co 2 Fe 24 O 41 samples. 26,27,60…”

Section: Resultsmentioning

confidence: 99%

Enhanced microwave absorption features of Ba₃Co₂Fe₂₄O₄₁ hexaferrite by high lanthanium doping concentration

et al. 2022

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“…Microwave-absorbing materials have to minimize electromagnetic radiation, particularly in military applications for stealth technology, to prevent detection by radars. [131,327,328] However, based on the preparation of samples at various thicknesses and the determination of the R L at each thickness using Figure 9. EDX spectra of BaM/CCTO composites.…”

Section: Theory Of Microwave Absorptionmentioning

confidence: 99%

“…Microwave‐absorbing materials have to minimize electromagnetic radiation, particularly in military applications for stealth technology, to prevent detection by radars. [ 131,327,328 ] However, based on the preparation of samples at various thicknesses and the determination of the R L at each thickness using the metal back approach and the S11 parameter, which is directly from VNA, MWA capabilities of absorbing materials are given in the equations below [ 306 ]

\begin{equation}{R_{\rm{L}}} = - 20\log \left| {{\mathop{\rm S}\nolimits} 11} \right|\end{equation}

…”

Section: Theory Of Microwave Absorptionmentioning

confidence: 99%

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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With the fast growth of wireless communication technology in high‐frequency ranges, electromagnetic (EM) interference has become a growing concern that has drawn international attention. The development of materials that can absorb EM radiation is a crucial solution. This review provides a detailed overview of ferrites, specifically hexagonal ferrites and their composites for microwave (MW) absorption. It examines hexagonal ferrite classifications based on the stacking order of their fundamental blocks and their synthesis methods and strategies for improving their magnetic properties. On the other hand, this review included a detailed examination of hexagonal ferrites–conducting polymer, hexagonal ferrites–2D materials, and hexagonal ferrite–other nanomaterials composites for MW absorption applications. Enhancing MW absorption in hexagonal ferrites‐based microwave absorption materials (MAMs) regulates their EM characteristics, improves impedance matching, and creates a diversity of loss mechanisms. In addition, the limitations, challenges, and opportunities of hexagonal ferrites‐based MAMs are discussed, which will be helpful to those working in related areas. As a general application potential, it is worth mentioning that, as a result of recent promising findings in the synthesis of hexagonal ferrites‐based composites, hexaferrite‐based composites are suitable devices in the area of microwave absorption.

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“…Therefore, it is important to select an absorber that has suitable EM properties for the required absorbing performance and used frequency. Materials such as carbon materials [ 4 , 5 , 6 ], carbonyl iron [ 7 , 8 , 9 ], and various ferrite materials [ 10 , 11 , 12 ] are mainly studied as absorbers because they are light, thin, and small but have a superior EM wave absorption performance. As for a magnetic absorber, soft magnetic spinel ferrite has mainly been studied and shown to modify the EM wave performance by substituting one or more divalent metal ions like Mn [ 13 , 14 , 15 ], Co [ 16 , 17 , 18 ], Ni [ 19 , 20 , 21 ], Cu [ 22 , 23 , 24 ], and Mg [ 25 , 26 ] at the site of Fe atoms.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Electrospun Ni0.5Zn0.5Fe2O4 Nanofibers Using Polyvinyl Pyrrolidone Precursors and Electromagnetic Wave Absorption Performance Improvement

Jang

Kim

et al. 2021

Polymers

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Ni0.5Zn0.5Fe2O4 nanofibers with an average diameter of 133.56 ± 12.73 nm were fabricated by electrospinning and calcination. According to our thermogravimetric—differential thermal analysis and X-ray diffraction results, the calcination temperature was 650 °C. The microstructure, crystal structure, and chemical composition of the nanofibers were observed using field-emission scanning electron, X-ray diffraction, and energy-dispersive X-ray spectroscopy. Commercial particle samples and samples containing 10 wt% and 20 wt% nanofibers were fabricated, and the electromagnetic properties were analyzed with a vector network analyzer and a 7.00 mm coaxial waveguide. Regardless of the nanofiber content, Ni0.5Zn0.5Fe2O4 was dominantly affected by the magnetic loss mechanism. Calculation of the return loss based on the transmission line theory confirmed that the electromagnetic wave return loss was improved up to −59.66 dB at 2.75 GHz as the nanofiber content increased. The absorber of mixed compositions with Ni0.5Zn0.5Fe2O4 nanofibers showed better microwave absorption performance. It will be able to enhance the performance of commercial electromagnetic wave absorbers of various types such as paints and panels.

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Design and development of Ga-substituted Z-type hexaferrites for microwave absorber applications: Mössbauer, static and dynamic properties

Cited by 51 publications

References 89 publications

Enhanced microwave absorption features of Ba₃Co₂Fe₂₄O₄₁ hexaferrite by high lanthanium doping concentration

Enhanced microwave absorption features of Ba₃Co₂Fe₂₄O₄₁ hexaferrite by high lanthanium doping concentration

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Fabrication of Electrospun Ni0.5Zn0.5Fe2O4 Nanofibers Using Polyvinyl Pyrrolidone Precursors and Electromagnetic Wave Absorption Performance Improvement

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Design and development of Ga-substituted Z-type hexaferrites for microwave absorber applications: Mössbauer, static and dynamic properties

Cited by 51 publications

References 89 publications

Enhanced microwave absorption features of Ba3Co2Fe24O41 hexaferrite by high lanthanium doping concentration

Enhanced microwave absorption features of Ba3Co2Fe24O41 hexaferrite by high lanthanium doping concentration

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Fabrication of Electrospun Ni0.5Zn0.5Fe2O4 Nanofibers Using Polyvinyl Pyrrolidone Precursors and Electromagnetic Wave Absorption Performance Improvement

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Enhanced microwave absorption features of Ba₃Co₂Fe₂₄O₄₁ hexaferrite by high lanthanium doping concentration

Enhanced microwave absorption features of Ba₃Co₂Fe₂₄O₄₁ hexaferrite by high lanthanium doping concentration