Study of the Radio-Wave Absorbing Properties of a Lithium-Zinc Ferrite Based Composite

Суржиков, А. П.; Lysenko, Elena; Малышев, А. В.; Vlasov, V. A.; Suslyaev, V. I.; Zhuravlev, V. A.; Korovin, E. Yu.; Dotsenko, O. A.

doi:10.1007/s11182-014-0284-9

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…This conclusion can be explained by the limited mobility of the adsorbed molecular fragments and, correspondingly, by a lowered probability of their capture by the growing active polymerization nuclei. Notice that named effect gains strength only during deposition of the boundary layer within which the surface field of the substrate takes place [16][17][18].…”

Section: Resultsmentioning

confidence: 99%

Regularities of Fluoropolymer Coating Growth on Pretreated Surfaces from Active Gas Phase

Рогачев

Luchnikov²,

Sarkisov

et al. 2019

MSF

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The kinetic and morphological peculiarities of polytetrafluoroethylene (PTFE) coating growth onset from the active gas phase on differently pretreated substrates are considered. The substrate surface energy was found to exert an effect on distribution of polymer micro-and nanoparticles both at the initial stage so during coating growth. The substrate surface activation was proved to result in the increasing growth rate and formation of a continuous coating with a thinner apparent thickness. The physicomathematical model of presented regularities was elaborated.

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Section: Resultsmentioning

confidence: 99%

Regularities of Fluoropolymer Coating Growth on Pretreated Surfaces from Active Gas Phase

Рогачев

Luchnikov²,

Sarkisov

et al. 2019

MSF

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“…The main source of adhesive interaction in the case of carbon-based coatings is covalent bonds or free σ-bonds of carbon atoms [2]. This type of bond can cause a very strong adhesive interaction and increase the friction coefficient, especially in the case of nonhydrogenated carbon coatings containing a high number of sp 3 -hybridized carbon atoms [26][27][28].…”

Section: Coatingmentioning

confidence: 99%

Nitrided Silicon-Carbon Coatings Structure and Properties

Руденков¹,

Rogachev²,

Zavadski³

et al. 2020

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The paper considers structural and physicomechanical properties of silicon-carbon coatings deposited from a gaseous medium in doping with nitrogen ions. The analysis of the coatings by X-ray photoelectron spectroscopy shows that nitriding of silicon-carbon coatings promotes the formation of silicon nitride and compounds such as CNx and SixOyNz. A 1.5–2-fold increase in the content of sp2 -hybridized carbon and silicon carbide atoms is found to prevent silicon oxidation. Thermal annealing of the resulting silicon-carbon coatings increases the content of the graphite phase and silicon oxide.It is shown that doping of the working gas with nitrogen (Ar57 % + N43 %) leads to the formation of a more finely dispersed structure as compared to that when using argon only. During thermal annealing in air, the decreased carbon concentration and increased oxygen concentration can be observed due to silicon and carbon oxidation followed by desorption of carbon and oxygen compounds. In addition, annealing leads to nitrogen desorption from the coating. Nitriding of silicon-carbon coatings increases the dispersion of their structure, and heat-resistant compounds CNх, Si3N4 improve heat resistance and thermal stability of coatings, and increase microhardness and friction coefficient in friction units.

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“…The most striking of these findings is the effect of multiple acceleration of synthesis [6][7][8][9][10][11] and sintering [12][13][14][15][16][17][18][19][20][21][22] of inorganic powder materials. The processes of ferrite material sintering under radiation-thermal effect have been most fully studied for lithium-titanium ferrites and similar structures [23][24][25][26][27][28][29]. It is obvious that the main functional characteristics of ferrimagnets are their magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2021

Eurasian phys. tech. j.

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The studies of correlation between magnetic properties and microstructure were conducted on samples of lithium-substituted ferrite, sintered in radiation and radiation-thermal conditions. Radiation-thermal sintering was performed for compacts irradiated with a pulsed electron beam with energy of (1.5-2.0) MeV, beam current per pulse of (0.5-0.9) A, irradiation pulse duration of 500 μs, pulse repetition rate of (5-50) Hz, and compact heating rate of 1000 C/min. Sintering in thermal furnaces (T-sintering) was carried out in a preheated chamber electric furnace. The paper shows that magnetic induction does not depend on the ferrite grain size. In this case, the coercive force is inversely proportional to the grain size and depends on the intragranular porosity of ferrite samples. In contrast to thermal sintering, radiation-thermal sintering does not cause capturing of intergranular voids by growing grains and enhances coagulation of intragranular pores.

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Study of the Radio-Wave Absorbing Properties of a Lithium-Zinc Ferrite Based Composite

Cited by 23 publications

References 12 publications

Regularities of Fluoropolymer Coating Growth on Pretreated Surfaces from Active Gas Phase

Regularities of Fluoropolymer Coating Growth on Pretreated Surfaces from Active Gas Phase

Nitrided Silicon-Carbon Coatings Structure and Properties

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