Radar Absorbing NiCo Nanoparticles in Carbon Matrix of Nanocomposites in the Microwave Range

Yakushko, E. V.; Кожитов, Л. В.; Муратов, Д. Г.; Korovin, E. Yu.; Lomov, A. A.; Попкова, А. В.

doi:10.1007/s11182-021-02292-8

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…Эффективными РПМ в метровом и дециметровом диапазонах ЭМИ являются КМ на основе ферритов-шпинелей [6][7][8][9]. В научной литературе имеется большое количество исследований радиопоглощающих свойств КМ с магнитными наполнителями из Ni, Co, Zn, Mn, содержащих ферритов-шпинелей с такими полимерными матрицами как полианилин, воск, эпокисдные смолы, поливиниловый спирт, поливини-лиденфторид (ПВДФ) [10][11][12][13][14][15][16][17]. В работах [10,11] исследованы микроволновые радиопоглощающие свойства композитов, где наночастицы Co−Zn и частицы Ni−Zn (с замещением Mg, La) ферритов вводились в парафиновую матрицу.…”

Section: введение 1 полимерные композиционные материалы как поглотители электромагнитного излученияunclassified

Радиопоглощающие и радиоэкранирующие характеристики феррит-полимерных композитов Mn-Zn феррит/П (ТФЭ-ВДФ)

Isaev¹,

Костишин²,

Шакирязнов³

et al. 2022

Журнал Технической Физики

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The article discusses the electromagnetic absorbing and shielding properties of ferrite-polymer composites of the composition Mn-Zn ferrite/fluoroplast-42, obtained by pressing a mixture of powders with heating. The measurement of the complex magnetic and dielectric permittivity spectra, as well as the reflection coefficient spectra was carried out in the frequency range 0.1 - 7 GHz. Using the obtained spectra, a comprehensive analysis of the absorbing characteristics of the composites was carried out, and the factors responsible for the absorption were determined. Fitting of the composites magnetic permeability spectra show that the process of natural ferromagnetic resonance prevails over the resonance of domain walls, and a decrease in the concentration of ferrite inclusions leads to a significant shift in the frequency of natural ferromagnetic resonance to high frequencies. It was found that for composites with a thickness of 5 - 10 mm, compositions with a mass fraction of ferrite ≤ 0.4 show radio-absorbing properties, while compositions with a fraction of ≥ 0.6 show shielding properties.

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Section: введение 1 полимерные композиционные материалы как поглотители электромагнитного излученияunclassified

Радиопоглощающие и радиоэкранирующие характеристики феррит-полимерных композитов Mn-Zn феррит/П (ТФЭ-ВДФ)

Isaev¹,

Костишин²,

Шакирязнов³

et al. 2022

Журнал Технической Физики

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“…Electromagnetic interference (EMI) and electromagnetic pollution caused by the elevated EMR background are among the most topical problems of the 21st century. EMI may shorten the lifetime and reduce the durability of electronic devices, and electromagnetic pollution may have a negative effect on vital activities of living organisms [1,2]. Materials for absorption or reflection of EMR are being researched actively to mitigate the EMI issues.…”

Section: Introductionmentioning

confidence: 99%

Radar absorbing properties of polyvinyl alcohol/Ni-Znferrite-spinel composite

et al. 2022

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The electromagnetic and radio-absorbing characteristics offerrite-polymer composites with conductive inclusions based on polyvinylalcohol are investigated. The Ni-Zn spinel ferrite powder of 2000NN gradewith composition Ni0.32Zn0.68Fe2O4 was used as filler. It is shown that theobtained composites are effective absorbers in the frequency range of 2-5 GHz with peak reflection loss less than ~20 dB. Through the analysis of thepermittivity spectra and permeability spectra, as well as the calculatedreflection loss spectra, critical factors of the electromagnetic waveabsorption in obtained composites are established. Keywords: polymer composite, radio absorption, nickel-zinc ferrite,polyvinyl alcohol\

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“…Currently, the large variety of methods for ferrites production are developed, but one of the widely used is still the method of ceramic processing technology due to its high producibility and utilization in industry. Since there is an acute problem related with electromagnetic compatibility and electromagnetic pollution, the works are performed on creation of technologies of electromagnetic shielding or electromagnetic radiation level suppression [8]. Ferrites and polymeric composites based on them are great to use as radiation absorbing materials, since they are materials with pronounced magnetic properties with high or medium resistivity [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic properties of polymer composites Li-=SUB=-0.33-=/SUB=-Fe-=SUB=-2.29-=/SUB=-Zn-=SUB=-0.21-=/SUB=-Mn-=SUB=-0.17-=/SUB=-O-=SUB=-4-=/SUB=-/P(VDF-TFE) in the frequency range 100-7000 MHz

et al. 2022

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The article describes electromagnetic and microwave properties of the polymer composite with the lithium spinel ferrite inclusion of composition Li0.33Fe2.29Zn0.21Mn0.17O4 in the frequency range 100-7000 MHz. It is shown that samples with a mass fraction of ferrite 60, 80% have pronounced radio-absorbing properties, measured using the reflection coefficient on a metal plate (return losses). For a composite with 80% ferrite, the minimum return loss was -37.5 dB at 2.71 GHz with an absorption width at -10 dB of 3 GHz. High absorption characteristics are directly related to the use of ferroelectric polymer P(VDF-TFE) as a binder, which is expressed in the combined action of the absorption mechanisms of the magnetic and ferroelectric phases. Keywords: lithium ferrite, polymer composite, polyvinylidene fluoride, radio-absorbing material.

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Radar Absorbing NiCo Nanoparticles in Carbon Matrix of Nanocomposites in the Microwave Range

Cited by 11 publications

References 21 publications

Радиопоглощающие и радиоэкранирующие характеристики феррит-полимерных композитов Mn-Zn феррит/П (ТФЭ-ВДФ)

Радиопоглощающие и радиоэкранирующие характеристики феррит-полимерных композитов Mn-Zn феррит/П (ТФЭ-ВДФ)

Radar absorbing properties of polyvinyl alcohol/Ni-Znferrite-spinel composite

Electromagnetic properties of polymer composites Li-=SUB=-0.33-=/SUB=-Fe-=SUB=-2.29-=/SUB=-Zn-=SUB=-0.21-=/SUB=-Mn-=SUB=-0.17-=/SUB=-O-=SUB=-4-=/SUB=-/P(VDF-TFE) in the frequency range 100-7000 MHz

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