PERSPEKTIVNYE MATERIALY
2022, No.9
Investigation of properties of solid-phase
electrode materials based
on lithium-vanadium phosphate
A. G. Kartushin, A. A. Zatsepin, I. A. Putsylov,
V. A. Zhorin, S. E. Smirnov
An original method for the synthesis of lithium-vanadium phosphate has been developed, which includes two stages: 1st — heat treatment of a mixture of vanadium oxide and ammonium dihydrophosphate; 2nd — mechanical activation of a mixture of the product obtained at the first stage with lithium hydroxide on Bridgman equipment, followed by heat treatment, and providing a 95 % product yield in a highly dispersed state. It is shown that electrodes based on synthesized Li3V2(PO4)3 are reversibly cycled in the basic 1C mode. Optimization of the ratio of the electrode components showed that its maximum characteristics are achieved with the following ratio between the components: 82 % Li3V2(PO4)3: 10 % carbon black : 8 % solid polymer electrolyte. Solid-phase electrodes based on lithium-vanadium phosphate surpass known analogues with liquid electrolyte in capacity, stability and persistence.
Keywords:phosphate, vanadium, lithium, cathode, electrolyte, polymer, battery.
DOI: 10.30791/1028-978X-2022-9-5-11
Kartushin Alexander —National Research University Moscow Power Engineering Institute (111250 Krasnokazarmennaya 14, Moscow), post-graduate student college Chemistry and electrochemical energetic department, specialist in the field of chemical current sources.
Zatsepin Alexey — National Research University Moscow Power Engineering Institute (111250 Krasnokazarmennaya 14, Moscow), post-graduate student college Chemistry and electrochemical energetic department, specialist in the field of chemical current sources.
Putsylov Ivan — National Research University Moscow Power Engineering Institute (111250 Krasnokazarmennaya 14, Moscow), PhD, associated professor, specialist in the field of electrochemistry. E-mail: Putsylov@yandex.ru.
Zhorin Vladimir — Semenov Research Center of Chemical Physics (4 Kosygina Street, Building 1, 119991 Moscow), Dr Sci (Phys-Math), specialist in materials treatment. E-mail: vzhorin@mail.ru.
Smirnov Sergey — National Research University Moscow Power Engineering Institute (111250 Krasnokazarmennaya 14, Moscow), Dr Sci (Eng), professor, specialist in the field of chemical current sources. E-mail: sesmirnov53@ mail.ru.
Kartushin A.G., Zatsepin A.A., Putsylov I.A., Zhorin V.A., Smirnov S.E. Issledovanie svojstv tverdofaznyh elektrodnyh materialov na osnove fosfata litiya – vanadiya [Investigation of properties of solid-phase electrode materials based on lithium-vanadium phosphate]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 5 – 11. DOI: 10.30791/1028-978X-2022-9-5-11
Simulated irradiation
of 16Cr – 4Al – 2W – 0.3Ti – 0.3Y2O3
ODS steel, perspective for thermonuclear reactors
in the plasma focus facility “Vikhr”
E. V. Demina, N. A. Vinogradova, A. S. Demin,
N. A Epifanov, E. V. Morozov, A. B. Mikhailova,
V. N. Pimenov, M. D. Prusakova, S. V. Rogozhkin, S. V. Shevtsov
A study of the radiation-thermal resistance of ferritic steel 16Cr – 4Al – 2W – 0.3Ti – 0.3Y2O3 was made. This ODS (oxide dispersion strengthened) steel is perspective for fusion applications. The “Vikhr” Plasma Focus installation was used to introduse of powerful pulsed flows of helium ions and helium plasma. The power density of a beam of fast helium ions and high-temperature helium plasma flows was ~ 108 and 107W/cm2 at exposure times of ~ 50 and 100 ns, respectively. The number of pulses N varied in the range from 10 to 30. The rate of evaporation and radiaсtive sputtering changed slightly with an increase in the number of pulses of energy flows acting on the material and amounted to h ≈ 0.01 – 0.02 μm/puls. The irradiated surface after repeated melting under the action of a pulsed radiation-thermal load with powerful energy flows acquired a wave-like character with inclusions of dispersed micro particles of the second phase, containing mainly yttrium, oxygen, aluminum, iron, and titanium. At the same time, in contrast to the refractory metals (W, Mo, Ti) earlier under similar radiation conditions studied, no micro- and macro cracks were formed on the surface of the material facing the plasma. “Vikhr” Plasma Focus setup proved to be an effective tool for simulation testing of candidate materials with magnetic and inertial plasma confinement.
Keywords:nuclear fusion reactors, Dense Plasma Focus, Fe – 16Cr ODS ferritic steel, radiation materials tests.
DOI: 10.30791/1028-978X-2022-9-12-22
Demina Elena — Baikov Institute of Metallurgy and Material Science RAS, (Russia, Moscow, 119991 Leninskiy pr.49), PhD (Eng), leading researcher, specialist in the field of radiation and space materials science. E-mail: elenadyom@mail.ru.
Vinogradova Natalia — Baikov Institute of Metallurgy and Material Science RAS (Russia, Moscow, 119991 Leninskiy pr.49), PhD (PhysMath), senior researcher, specialist in the field of radiation and space materials science. E mail: na_vin@mail.ru.
Demin Aleksandr — Baikov Institute of Metallurgy and Material Science of RAS (49 Leninskii Prospect, Moscow 119334, Russia), research worker. E-mail addres: casha@bk.ru.
Epifanov Nikita — Baikov Institute of Metallurgy and Material Science RAS (49 Leninskii Prospect, Moscow 119334, Russia), junior researcher; National Research University Higher School of Economics (20 Myasnitskaya, Moscow 101000, Russia), postgraduate student. E-mail: mophix94@gmail.com.
Morozov Evgenii — Baikov Institute of Metallurgy and Material Science of RAS (49 Leninskii Prospect, Moscow 119334, Russia), research worker. E-mail: lieutenant@list.ru.
Mikhaylova Alexandra — Baikov Institute of Metallurgy and Material Science of RAS (49 Leninskii Prospect, Moscow 119334, Russia), PhD, Senior Researcher, specialist in the field of X-ray diffraction and X-ray phase analysis of various ceramic, magnetic and superconducting materials, alloys, ore minerals. E-mail: Sasham1@mail.ru.
Pimenov Valeriy — Baikov Institute of Metallurgy and Material Science RAS (Russia, Moscow, 119991 Leninskiy pr.49), Dr Sci (PhysMath), head of laboratory, specialist in the field of radiation and space materials science. E-mail: pimval@mail.ru
Prusakova Marina — Baikov Institute of Metallurgy and Material Science RAS (Russia, Moscow, 119991 Leninskiy pr.49), researcher, specialist in the field of radiation and space materials science. E-mail: prusakovam@mail.ru.
Rogozhkin Sergey — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), Head of department, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)(Moscow, 115409, Kashirskoe shosse, 31), Professor, Doctor of Science in Physics and Mathematics, Specialist in condensed matter physics. E-mail: sergey.rogozhkin@itep.ru, SVRogozhkin@mephi.ru.
Shevtsov Sergey — Baikov Institute of Metallurgy and Material Science of RAS (49 Leninskii Prospect, Moscow 119334, Russia), PhD (chem), senior researcher, specialist in electron microscopy and materials science. E-mail: shevtsov_sv@mail.ru.
Demina E.V., Vinogradova N.A., Demin A.S., Epifanov N.A, Morozov E.V., Mikhailova A.B., Pimenov V.N., Prusakova M.D., Rogozhkin S.V., Shevtsov S.V. Imitacionnoe obluchenie DUO stali 16Cr – 4Al – 2W – 0,3Ti – 0,3Y2O3, perspektivnoj dlya termoyadernyh reaktorov, v ustanovke Plazmennyj fokus “Vihr'” [Simulated irradiation of 16Cr-4Al-2W-0.3Ti-0.3Y2O3ODS steel, perspective for thermonuclear reactors in the Plasma focus facility “Vikhr”]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 12 – 22. DOI: 10.30791/1028-978X-2022-9-12-22
Equilibrium and kinetic characteristics
of the sorption of Co(II), Cu(II), Sr(II) and Cs(I) ions
on layered Mg – Al double hydroxides
D. V. Mayorov, E. K. Kopkova
Mg – Al layered hydroxide of Mg4Al2(OH)12CO3×3H2O composition with hydrotalcite structure was obtained by solid-phase interaction of AlCl3·6H2O and MgCl2·6H2O c (NH4)2CO3. Sorption properties of the obtained sample with respect to non-ferrous metal ions — Co2+, Cu2+, Sr2+ and Cs+ are investigated. Experimental data were processed using the Freundlich and Langmuir sorption equations. It is established that the sorption process of these ions is adequately described by the Langmuir monomolecular adsorption equation (the coefficients of determination R2 of the linear forms of the equations are 0,985 – 0,999. The capacities of the adsorption monolayer of the synthesized Mg – Al layered hydroxide sample were calculated, amounting to 2,13, 2,21, 1,88 and 3,48 mmol/g with respect to Co2+, Cu2+, Sr2+ and Cs+ ions, respectively, which is in good agreement with the values noted in international practice and the adsorption equilibrium constants. Morris-Weber and Boyd diffusion models, Lagergren pseudo-first order models, and Ho and McKay pseudo-second order models were used to model sorption kinetics. It is shown that the sorption process is most accurately described by a pseudo-second-order kinetic model and proceeds in a mixed diffusion mode involving not only the outer surface of the material, but also the inner surface of its particles due to their porosity in the sorption process. The obtained values of the sorption capacity of the synthesized material indicate the prospects of its application for the extraction of Co2+, Cu2+, Sr2+ and Cs+ ions from industrial wastewater and drinking water purification.
Keywords:Mg – Al layered double hydroxides, wastewater, water treatment, Co(II), Cu(II), Sr(II) and Cs(I) ions, sorption, sorption capacity.
DOI: 10.30791/1028-978X-2022-9-23-34
Mayorov Dmitriy — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre Kola Science Centre of the RAS (184209 Apatity, Murmansk region, Akademgorodok, 26a), PhD (Eng), senior research worker, specialist in the development of complex technologies of mineral raw materials. E-mail: d.maiorov@ksc.ru.
Kopkova Elena — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre Kola Science Centre of the Russian Academy of Sciences (Russia, 184209, Apatity, Murmansk region, Akademgorodok, 26a), PhD (Eng),senior research worker, specialist in the development of complex technologies of mineral raw materials. E-mail: e.kopkova@ksc.ru.
Mayorov D.V., Kopkova E.K. Ravnovesnye i kineticheskie harakteristiki sorbcii ionov Co(II), Cu(II), Sr(II) i Cs(I) na sloistyh dvojnyh gidroksidah Mg – Al [Equilibrium and kinetic characteristics of the sorption of Co(II), Cu(II), Sr(II) and Cs(I) ions on layered Mg-Al double hydroxides].Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 23 – 34. DOI: 10.30791/1028-978X-2022-9-23-34
Biodegradable paper-based membranes
for water treatment
D. D. Fazullin, L. I. Fazullina, G. V. Mavrin
A biodegradable nanofiltration membrane has been obtained for the processes of water purification from calcium and magnesium cations. The membrane was obtained on a porous paper substrate with a surface layer of cellulose acetate; ethanol was added as a pore former to the polymer solution. According to the results of the study, it was found that the surface of the membranes is hydrophilic, the total porosity of the membrane is 50 %. According to the results of the SEM study, the membrane consists of a paper substrate 90 µm thick, a porous AC layer 8 – 10 µm thick, and a dense AC surface layer 1 µm thick. The resulting MAC3 membrane was used for nanofiltration of tap water, where a high retention capacity for calcium and magnesium ions was shown – 77.2 % at a specific productivity of 111 dm3/(m2·h), which is not inferior to the parameters of a commercial nanofiltration membrane. The possibility of natural decomposition of spent membranes in the soil cover was studied in this work. Within 24 days, the obtained composite membranes decompose by more than 60 %.
Keywords: composite membrane, paper, cellulose acetate, biodegradation, porosity, IR spectra, electron microscopy, retention.
DOI: 10.30791/1028-978X-2022-9-35-44
Fazullin Dinar — Kazan Federal University (Naberezhnye Chelny, 423810, prospect Mira, 68/19), PhD (Eng), associate professor of chemistry and ecology department, membrane technology specialist. E-mail: denr3@yandex.ru.
Fazullina Leysan — Kazan Federal University (Naberezhnye Chelny, 423810, prospeсt Mira, 68/19), an employee of the engineering center of the Naberezhnye Chelny Institute of KFU, specialist in the field of instrumental methods for the study of water bodies. E-mail: fazullinaleisan@yandex.ru.
Mavrin Gennady — Kazan Federal University (Naberezhnye Chelny, 423810, prospect Mira, 68/19), PhD (Chem), head of chemistry and ecology department, specialist in environmental monitoring and sorption processes. E-mail: mavrin-g@rambler.ru.
Fazullin D.D., Fazullina L.I., Mavrin G.V. Biorazlagaemye membrany na bumazhnoj osnove dlya vodoochistki [Biodegradable paper-based membranes for water treatment]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 35 – 44. DOI: 10.30791/1028-978X-2022-9-35-44
Cementing materials based on magnesium
and calcium phosphates with sodium hyaluronate
P. A. Krokhicheva, M. A. Goldberg, D. R. Khairutdinova,
A. S. Fomin, A. V. Kondratiev, A. V. Leonov,
A. S. Baikin, O. S. Antonova, A. M. Sentsova,
S. M. Barinov, V. S. Komlev
In the recent years, a magnesium-calcium phosphate materials are considered as an alternative to materials based on the calcium phosphates in the reconstructive surgery. The injectable bone cements have been particular interest for the minimally invasive surgical approaches. The aim of this work is considered to the creating and studying of the structural-phase state of cement materials based on the Newberite phase (MgHPO4·3H2O). The addition of a polymer - sodium hyaluronate in the cement fluid, based on a sodium phosphate solution, leeds to the increasing of the viscosity of the system, thereby increasing the cohesion of cement materials. The effect of addition sodium hyaluronate in the various concentrations on the phase composition, setting time, pH value, microstructure, injectability and strength properties of cement materials has been studied.
Keywords: bone cements, calcium phosphate, magnesium phosphate, sodium hyaluronate, injectability, cohesion, stanfieldite, newberite.
DOI: 10.30791/1028-978X-2022-9-45-55
Krokhicheva Polina —Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), junior researcher, specialist in the field of cement biomaterials.
E-mail: polinariakroh@gmail.com, tel: 89152496564.
Goldberg Margarita — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), PhD, researcher, specialist in the field of materials science of ceramic and cement materials. E-mail: mgoldberg@imet.ac.ru.
Antonova Olga —Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), junior researcher, specialist in the field of materials science of ceramic and cement materials. E-mail: oantonova@imet.ac.ru.
Khairutdinova Dinara —Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), PhD, junior researcher, specialist in the field of materials science of ceramic and cement materials. E-mail: dvdr@list.ru.
Kondratiev Alexander — National Research Technological University “MISIS” (119049 Moscow, Leninsky Prospekt, 4, building 1) senior researcher, specialist in thermodynamic modeling in the development of new materials. E-mail: al.v.kondratiev@gmail.com.
Baikin Alexander — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), PhD, researcher, specialist in mechanical research. E-mail: baikinas@mail.ru.
Leonov Alexander — Moscow State University (119991 Moscow, Leninskiye Gory, 1), PhD, senior researcher, specialist in the structural analysis. E-mail: aleonov49@gmail.com.
Sentsova Anita —Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), research engineer, specialist in the field of materials science of ceramic and cement materials. E-mail: anitasentsova11@gmail.com.
Barinov Sergei —Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), corresponding member of the Russian academy of sciences, Dr Sci (Eng), head of laboratory, specialist in the field of materials science of composite materials. E-mail: barinov_s@mail.ru.
Komlev Vladimir —Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospekt, 49), director, corresponding member of the Russian academy of sciences, Dr Sci (Eng), specialist in the field of biomaterials. E-mail: komlev@mail.ru.
Krokhicheva P.A., Goldberg M.A., Khairutdinova D.R., Fomin A.S., Kondratiev A.V., Leonov A.V., Baikin A.S., Antonova O.S., Sentsova A.M., Barinov S.M., Komlev V.S. Cementnye materialy na osnove fosfatov magniya i kal'ciya s gialuronatom natriya [Cementing materials based on magnesium and calcium phosphates with sodium hyaluronate]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 45 – 55. DOI: 10.30791/1028-978X-2022-9-45-55
Thermal deformation characteristics
of nanocomposites based on polypropylene
and household waste thermal ash
N. T. Kakhramanov, A. A. Gasanova, Kh. V. Allahverdiyeva,
Z. N. Guseynova, N. B. Arzumanova
The paper presents the results of a study of the influence of the concentration and particle size of the filler on the thermomechanical properties of composite materials based on polypropylene and waste from waste processing industry (thermal ash). Three grindings of thermal ash were used with particle sizes: 90 nm, 300 – 500 nm and 1200 – 2000 nm. It has been established that with an increase in the size of thermal ash particles, the deformation curve in the region of the viscous-flow state shifts to the region of high temperatures. As a compatibilizer used functionalized with 5.6 wt. % maleic anhydride polypropylene grade Exxelor PO1020 to improve miscibility and compatibility of non-polar polypropylene with thermal ash particles. It is shown that the introduction of different amounts of the cross-linking agent dicumyl peroxide contributes to a significant change in the pattern of deformation of nanocomposites with temperature. The concentration of dicumyl peroxide was varied within 0.25 – 2.0 wt. %. Peroxide crosslinking using 0.25 – 0.5 wt. % dicumyl peroxide contributed to the appearance of a region of highly elastic deformation on composites with 5.0 and 40 wt. % thermal ash. With an increase in the concentration of dicumyl peroxide over 0.5 wt. % vitrification of nanocomposites was observed. In this state, the samples are completely crosslinked and pass into the infusible state. Such an infusible state is highly undesirable since it is not possible to process them by injection molding and extrusion.
Keywords: nanocomposite, thermomechanical curve, thermal ash, highly elastic state, viscous state, glassy state, dicumyl peroxide, deformation.
DOI: 10.30791/1028-978X-2022-9-56-63
Kakhramanov Najaf Tofig oglu — Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (AZ5004, Azerbaijan Republic, Sumgait, S.Vurgun str., 124),
Dr Sci (Chem), professor, head of laboratory, specialist in the field of processing, chemical and mechano-chemical structure modification of polyolefines, obtaining and investigation of nanocomposites. E-mail: najaf1946@rambler.ru.
Gasanova Aynura Akhmed gizi — Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (AZ5004, Azerbaijan Republic, Sumgait, S.Vurgun str., 124), researcher of the laboratory, specialist in the field of studying the structure and properties of composite materials.
Allakhverdiyeva Khayala Vagif gizi —Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (AZ5004, Azerbaijan Republic, Sumgait, S.Vurgun str., 124), PhD (Chem), associate professor, leading researcher of the laboratory, specialist in the field of modification and study of the structure and properties of nanocomposites.
Guseynova Zulfira Neymat gizi —Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (AZ5004, Azerbaijan Republic, Sumgait, S.Vurgun str., 124),
PhD (Chem), associate professor, leading researcher of the laboratory, specialist in the field of processing, modification and research of the properties of composites.
Arzumanova Nushaba Baba gizi — Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (AZ5004, Azerbaijan Republic, Sumgait, S.Vurgun str., 124),
PhD (Chem), associate professor, leading researcher of the laboratory, specialist in the field of study of the structure and properties of nanocomposites.
Kakhramanov N.T., Gasanova A.A., Allahverdiyeva Kh.V., Guseynova Z.N., Arzumanova N.B. Termodeformacionnye harakteristiki nanokompozitov na osnove polipropilena i termozoly bytovyh othodov [Thermal deformation characteristics of nanocomposites based on polypropylene and household waste thermal ash]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 56 – 63. DOI: 10.30791/1028-978X-2022-9-56-63
Component selection and nano-structuring
of WS2/MoS2/a-C thin-film coatings
for effective friction reduction
in difficult conditions of sliding
R. I. Romanov, D. V. Fominski, V. N. Nevolin,
V. A. Kasianenko, V. Yu. Fominski
The possibility of forming new solid-lubricating thin-film coatings consisting of nanosized layers of WS2, MoS2 and amorphous carbon (a-C) with improved antifriction properties has been studied. To control the tribological properties of coatings, the conditions for obtaining layers of 2Н-WS2 and 2Н-MoS2 with a thickness of 5 – 20 nm with a crystalline laminar structure with a basal orientation to the substrate were determined. Nanolayers were created by reactive pulsed laser deposition from metal and metal oxide targets in hydrogen sulfide at elevated temperatures. It is shown that when alternating the processes of selected films deposition, no noticeable solid-phase reactions were observed at the interfaces. Tribological tests were carried out at room temperature using the method of sliding a steel ball over a coated disk without lubrication in an atmosphere enriched with nitrogen (~ 9 % relative humidity). The structural state of the coatings before and after the tribotests was studied by Raman spectroscopy. The lowest friction coefficient ~ 0,015 was found for the WS2coatings deposited at 500 °C. The tribological properties of the MoS2coatings turned out to be much worse. The coating, consisting of the WS2and carbon nanolayers, showed a slightly higher friction coefficient (0,021), but it had the enhanced wear resistance.
Keywords: solid lubricant coatings, tungsten disulfide, amorphous carbon, multilayer coatings, coefficient of friction, pulsed laser deposition.
DOI: 10.30791/1028-978X-2022-9-64-76
Romanov Roman — National Research Nuclear University “MEPhI” (Moscow, 115409 Kashirskoe sh., 31), PhD (Phys-Math), researcher, specialist in the field of physical and chemical methods for obtaining and studying thin-film structures of various functional purposes. E-mail: limpo2003@mail.ru.
Fominski Dmitry — National Research Nuclear University “MEPhI” (Moscow, 115409, Kashirskoye sh., 31), engineer, specialist in the field of pulsed laser deposition of thin films and nanostructures. E-mail: dmitryfominski@gmail.com.
Nevolin Vladimir — National Research Nuclear University “MEPhI” (Moscow, 115409 Kashirskoe sh., 31), Dr Sci (Phys-Math), professor, specialist in the field of physics of thin-films and nanosystems. E-mail: vnnevolin@mephi.ru.
Kasianenko Vladislav —National Research Nuclear University “MEPhI” (31 Kashirskoye sh., Moscow, 115409), PhD student, specialist in the field of production and research of tribocoatings. E-mail: kasianenkovladislav@mail.ru.
Fominski Vyacheslav —National Research Nuclear University “MEPhI” (Moscow, 115409, Kashirskoye sh., 31), Dr Sci (Phys-Math), professor, chief researcher, specialist in the field of physics of thin-films, nanostructures and beam technologies of surface modification. E-mail: vyfominskij@mephi.ru.
Romanov R.I., Fominski D.V., Nevolin V.N., Kasianenko V.A., Fominski V.Yu. Vybor komponentov i nano-strukturirovanie tonkoplenochnyh pokrytij WS2/MoS2/a-C dlya snizheniya treniya skol'zheniya v oslozhnennyh usloviyah [Component selection and nano-structuring of WS2/MoS2/a-C thin-film coatings for effective friction reduction in difficult conditions of sliding].Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 64 – 76. DOI: 10.30791/1028-978X-2022-9-64-76
Synthesis of bismuth germanate
with a crystalline eulithine structure by casting
T. V. Bermeshev, V. P. Zhereb, L. G. Kharitonova,
E. V. Mazurova, A. S. Yasinsky, M. P. Bundin,
V. M. Bespalov, O. V. Yushkova, P. O. Yuryev,
A. I. Bezrukikh, O. V. Yakivyuk
The conditions for the preparation of a compound with an eulithine crystal structure (ESS) during the crystallization of a stoichiometric melt in the Bi2O3 – GeO2 system by casting have been investigated. The initial components (Bi2O3 and GeO2) were placed in a platinum crucible and heated to a temperature in zone C at a rate of ~ 20 °C/min, with holding under isothermal conditions for 1 h. Then, the melt was poured from the crucible onto a heated platinum plate. The macrostructure of the surface of the crystallized samples was observed using a Stemi 2000 stereoscope (Carl Zeiss), the microstructure was observed using a Carl Zeiss Axio Observer A1m optical microscope on microsections. X-ray phase analysis (XRD) of the powder was performed on a Shimadzu XRD 6000 diffractometer (Cu Kα radiation). Atomic absorption spectrometry was carried out on a SOLAAR M device. For the first time, the possibility of obtaining Bi4Ge3O12 with the eulithine crystal structure (ESS) by fusing a stoichiometric mixture of initial oxides and subsequent cooling of the melt by casting was experimentally shown. It is shown that when using this method, it is possible not only to achieve record rates of synthesis, but also to reduce the content of platinum (which is a harmful impurity) in the resulting material by 2 times.
Keywords: casting, stable phase, bismuth germinate, melt crystallization, heat treatment of the melt.
DOI: 10.30791/1028-978X-2022-9-77-87
Bermeshev Timofey — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), leading engineer; junior researcher, specialist in the field of heat treatment of metals and alloys, in the field of synthesis of oxide bismuth-containing materials. E-mail: irbis_btv@mail.ru.
Zhereb Vladimir — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), Dr Sci (Chem), associate professor, head of Bironte department, specialist in the field of synthesis of oxide bismuth-containing materials. E-mail: vpzhereb@rambler.ru.
Kharitonova Liliya — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), engineer of the laboratory, specialist in the field of physical and chemical analysis. E-mail: lkharitonova@sfu-kras.ru.
Mazurova Elena — Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian academy of sciences (50 Akademgorodok, 660036, Krasnoyarsk, bd 24), PhD (Eng), researcher of the laboratory, specialist in the field of X-ray spectral analysis. E-mail: len.mazurowa@yandex.ru.
Yasinsky Andrey — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk); Institute for Process Metallurgy and Metal Recycling (RWTH Aachen University, Germany, 52056 Aachen, Intzestraße 3), PhD (Eng), associate professor, head of the laboratory, specialist in the field of light metal metallurgy, raw materials and materials for the production of aluminum, metallurgical processes, electrolytic production of aluminum.
E-mail: ayasinskiykrsk@gmail.com.
Bundin Mikhail — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), principal software engineer of the Biront department; junior researcher, specialist in the field of heat treatment of metals and alloys. E-mail: bundin007.86@gmail.com.
Bespalov Vadim — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), PhD (Eng), associate professor, specialist in metal forming. E-mail: VMBespalov@mail.ru.
Yushkova Olga — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), PhD (Eng), head of the laboratory, research engineer, specialist in metal science and heat treatment of metals, metallurgy of ferrous, non-ferrous and rare metals. E-mail: olga_yushkova_1954@mail.ru.
Yuryev Pavel — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), junior researcher of the research department, engineer of the educational and scientific production laboratory, foundry specialist. E-mail: pashka_urew@mail.ru.
Bezrukikh Aleksandr — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), PhD (Eng), associate professor of the department of foundry, deputy head of the scientific research department, head of the Mamina scientific and educational laboratory of dispersed and nanostructured solid, viscous and colloidal materials, manufacturing specialist. E-mail: abezrukikh@sfu-kras.ru.
Yakivyuk Olga — Siberian Federal University (79 Svobodny pr., 660041 Krasnoyarsk), PhD (Eng), department of international educational programs, specialist in metal forming, metal science and heat treatment of metals. E-mail: yakivyuk.olga@yandex.ru.
Bermeshev T.V., Zhereb V.P., Kharitonova L.G., Mazurova E.V., Yasinsky A.S., Bundin M.P., Bespalov V.M., Yushkova O.V., Yuryev P.O., Bezrukikh A.I., Yakivyuk O.V. Sintez germanata vismuta s kristallicheskoj strukturoj evlitina metodom lit'ya [Synthesis of bismuth germanate with a crystalline eulithine structure by casting]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 9, pp. 77 – 87. DOI: 10.30791/1028-978X-2022-9-77-87
