Obtaining anisotropic hexaferrites for the base layers of microstrip shf devices by the radiation-thermal sintering

Kostishyn, V.G.; Isaev, I. M.; Щербаков, С. В.; Nalogin, A. G.; Belokon, E. A.; Bryazgin, A. A.

doi:10.15587/1729-4061.2016.80070

Cited by 7 publications

(3 citation statements)

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“…A synthesis method was previously developed to reduce the temperature and time of ferrite synthesis; it employs heating of the initial reagents by an electron beam with energies above 1 MeV [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. High electron energies provide the possibility of volumetric heating of the synthesized samples, and the electron penetration depth depends on the density of the samples.…”

Section: Introductionmentioning

confidence: 99%

“…The electron-beam heating method was used to synthesize ferrites of various compositions, including spinel lithium, lithium-zinc and manganese-zinc ferrites, and hexagonal ferrites [ 35 , 38 , 39 , 40 , 41 , 42 ]. In [ 43 , 44 , 45 ], it was shown that this heating method increases the rate of solid-phase interaction between the initial reagents, which significantly decreases the ferrite synthesis temperature.…”

Section: Introductionmentioning

confidence: 99%

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Technological Aspects of Lithium-Titanium Ferrite Synthesis by Electron-Beam Heating

et al. 2023

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Solid-phase synthesis of lithium-titanium ferrite by electron-beam heating of a Fe2O3–Li2CO3–TiO2 initial reagents mixture with different history (powder, compact, mechanically activated mixture) was studied using X-ray diffraction, thermomagnetometric and specific saturation magnetization analyses. Ferrite was synthesized using an ILU-6 pulsed electron accelerator; it generated electrons with electron energy of 2.4 MeV to heat samples to temperatures of 600 and 750 °C. The isothermal holding time upon reaching the synthesis temperature was 0–120 min. The efficiency of ferrite synthesis by electron-beam heating was evaluated via comparison of the characteristics of the obtained samples with those synthesized by conventional ceramic technology under similar temperature-time conditions. It was found that the rate of ferrite formation depends on the heating method, temperature, synthesis time, density, and activity of the initial mixture. It was shown that sample compaction provides the preferential formation of unsubstituted lithium ferrite of Li0.5Fe2.5O4 composition with a Curie temperature of at ca. 630 °С in both synthesis methods. High-energy electron-beam heating of the mechanically activated mixture significantly accelerates synthesis of Li0.6Fe2.2Ti0.2O4 substituted ferrite, for which the Curie temperature and specific saturation magnetization were recorded as 534 °С and 50 emu/g, respectively. Therefore, LiTi ferrites can be obtained at a lower temperature (750 °C) and with a shorter synthesis time (120 min) compared to traditional ceramic technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Technological Aspects of Lithium-Titanium Ferrite Synthesis by Electron-Beam Heating

et al. 2023

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“…In recent years, the impact of ionizing radiation fluxes has been developed in the production and modification of materials. In this case, the fundamental phenomenon of a multiple increase in the process of synthesis of multicomponent powder materials [5][6][7][8][9][10][11][12][13] and sintering [14][15][16][17][18][19][20][21][22][23][24] under radiation-thermal (RT) conditions was discovered. The processes of lithium-titanium ferrites sintering have been most fully studied under such specific conditions of the combined action of high temperatures and intense electron flows [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

TUDY OF THE INITIAL MAGNETIC PERMEABILITY OF LiTiZnMnFERRITES OBTAINED BY LIQUID-PHASE SINTERING UNDER RADIATION-THERMAL AND THERMAL CONDITIONS

Surzhikov¹

2023

Eurasian phys. tech. j.

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The measuring the temperature dependence of the initial permeability was used to study the features of phase and structural transformations in lithium-titanium ferrites as a function of time, heating and cooling rates, and the temperature of liquid-phase sintering under thermal and radiation-thermal heating. Ferrite was synthesized from powder mixture by solid-phase synthesis. A low-melting additive bismuth dioxide was used to obtain the ferrite ceramics by liquid-phase sintering. RT sintering was carried out by heating the samples with a pulsed (1.5–2.0) MeV electron beam. It was established that the additive leads to a less defective state of sintered ferrites, while the action of radiation enhances this effect in the early stages of sintering. The regularities of the influence of the heating and cooling rates of compacted samples on the change in the initial magnetic permeability of sintered ferrites are established.

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Practical Thermometry of Materials Irradiated by Powerful Beams of Accelerated Electrons

Суржиков

Lysenko

Starý

2022

Recent Developments in the Field of Non-Destructive Testing, Safety and Materials Science

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Obtaining anisotropic hexaferrites for the base layers of microstrip shf devices by the radiation-thermal sintering

Cited by 7 publications

References 8 publications

Technological Aspects of Lithium-Titanium Ferrite Synthesis by Electron-Beam Heating

Technological Aspects of Lithium-Titanium Ferrite Synthesis by Electron-Beam Heating

TUDY OF THE INITIAL MAGNETIC PERMEABILITY OF LiTiZnMnFERRITES OBTAINED BY LIQUID-PHASE SINTERING UNDER RADIATION-THERMAL AND THERMAL CONDITIONS

Practical Thermometry of Materials Irradiated by Powerful Beams of Accelerated Electrons

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