PERSPEKTIVNYE MATERIALY
2023, No.8
Elecrophysical properties of ceramic
solid solutions Li0.03Na0.97TayNb1 – yO3 (y = 0.1 – 0.7)
with perovskite structure
in the region of antiferro-ferroelectric transition
V. V. Efremov, M. N. Palatnikov, O. B. Shcherbina
The electrophysical properties (dielectric permittivity, dielectric loss tangent, electrical conductivity) of Li0.03Na0.97TayNb1-yO3 (у = 0.1 – 0.7) ferroelectric solid solutions with the perovskite structure were studied. In the temperature range of 290 – 830 K, the investigated solid solutions undergo three phase transitions. The phase transitions are strongly smeared as the tantalum concentration increases. The Curie temperatures are established and it is shown that an increase in the concentration of tantalum leads to a decrease in this temperature. The values of the static electrical conductivity of ferroelectric solid solutions Li0.03Na0.97TayNb1 – yO3 (у = 0.1 – 0.7) and the activation enthalpies of charge carriers are determined.
Keywords: ferroelectrics, sodium niobate, solid solutions, phase transitions, impedance spectroscopy.
DOI: 10.30791/1028-978X-2023-8-5-14
Efremov Vadim — Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” Science Centre of Russian Academy of Sciences (184209 Murmansk region, Apatity, “Academic town”, 26a), PhD (Engineering), senior researcher, specialist in materials science of functional dielectric ferroelectric and related materials. E-mail: v.efremov@ksc.ru.
Palatnikov Mikhail — Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” Science Centre of Russian Academy of Sciences (184209 Murmansk region, Apatity, “Academic town”, 26a), PhD (Engineering), chief researcher, head of Laboratory, specialist in materials science of functional dielectric ferroelectric and related materials. E-mail: m.palatnikov@ksc.ru.
Shcherbina Olga — Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” Science Centre of Russian Academy of Sciences (184209 Murmansk region, Apatity, “Academic town”, 26a), Dr Sci. (Engineering), senior researcher, specialist in materials science of functional dielectric ferroelectric and related materials. E-mail: o.shcherbina@ksc.ru.
Efremov V.V., Palatnikov M.N., Shcherbina O.B. Elekrofizicheskie svojstva keramicheskih tvyordyh rastvorov Li0,03Na0,97TayNb1 – yO3 (y = 0,1 – 0,7) so strukturoj perovskita v oblasti antisegneto-segnetoelektricheskogo perekhoda [Elecrophysical properties of ceramic solid solutions Li0.03Na0.97TayNb1 – yO3 (y = 0.1 – 0.7) with perovskite structure in the region of antiferro-ferroelectric transition]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 5 – 14. DOI: 10.30791/1028-978X-2023-8-5-14
Advanced layered flexible radio-absorbing materials
based on powdered charcoal
O. V. Boiprav, V. A. Bogush
The article presents the technique for obtaining advanced layered radio-absorbing materials based on powdered charcoal. The technique includes the following technologies: incorporation of the electrolyte aqueous solution into the material particles pores; adhesive pressing. The developed technique is more manufacturable compared to the analogs. Materials obtained in accordance with this technique are characterized by the flexibility, as well as lower cost compared to other carbon-containing radio-absorbing materials. The experimental characteristics of electromagnetic radiation reflection and transmission coefficients in the frequency range 2.0 – 17.0 GHz of the materials obtained in accordance with the developed technique are described. The results of the comparative analysis of these characteristics are provided. Based on these results, it’s determined that the average values of electromagnetic radiation reflection coefficient in the specified frequency range of the materials based on powdered non-activated wood charcoal, powdered activated wood charcoal and powdered activated coconut charcoal are –4.5 dB, –8,5 dB and –9.0 dB (when these materials fixed on metal reflectors). The average values of their electromagnetic radiation transmission coefficient are –11.5 dB, –20.0 dB and –15.5 dB respectively. The investigated materials seem to be promising for use in order to protect electronic equipment from external electromagnetic interference.
Key words: reflection coefficient, transmission coefficient, radio-absorbing material, charcoal.
DOI: 10.30791/1028-978X-2023-8-15-26
Boiprav Olga — Educational Institution Belarusian State University of Informatics and Radioelectronics (220013 Republic of Belarus, Minsk, P. Brovki str., 6.), PhD, associate professor, associate professor of the Information protection department, senior researcher of R&D department, specialist in the field of radio absorbing materials development. E-mail: smu@bsuir.by.
Bogush Vadim — Educational Institution Belarusian State University of Informatics and Radioelectronics (220013 Republic of Belarus, Minsk, P. Brovki str., 6.), Doctor of Sciences, professor, professor of the information protection department, chief researcher of R&D department, specialist in the field of radio absorbing materials development. E-mail: bogush@bsuir.by.
Boiprav O.V., Bogush V.A. Perspektivnye sloistye gibkie radiopogloshchayushchie materialy na osnove poroshkoobraznogo uglya [Advanced layered flexible radio-absorbing materials based on powdered charcoal]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 15 – 26. DOI: 10.30791/1028-978X-2023-8-15-26
Structure and physico-chemical properties
of nanostructured sorption material based
on graphene oxide modified with organic polymers
A. E. Burakov, E. S. Mkrtchyan, I. V. Burakova,
O. A. Ananyeva, T. P. Dyachkova, A. G. Tkachev
A synthesis of a new hybrid nanostructured sorbent based on graphene oxide modified with organic polymers of biological origin, such as chitosan and lignin, were developed. The effect of different mass ratios of the initial components (graphene oxide, lignosulfonate, chitosan) on the final sorbent properties was considered as applied to the liquid-phase sorption of organic dyes and heavy metal ions. Using scanning and transmission electron microscopy, X-ray diffractometry, thermogravimetry, infrared spectroscopy and Raman spectroscopy, the resulting compositions properties were evaluated. Presumably, during the nanocomposites formation, the macromolecules of chitosan and lignosulfonate were located between the layers of graphene oxide. The materials sorption capacity from different batches was studied under static conditions using as example of the lead ions and the organic dye — methylene blue (MB), sorption. It has been established that the sorption capacity for the composition 20:1:1 was the maximum value in the considered samples line — 1849.8 mg/g for MB and 324.6 mg/g for lead ions at a sorption time of 15 min. Thus, the study showed that the synthesized nanostructured composites modified with environmentally friendly and economical additives are suitable for removing various nature pollutants from water.
Keywords: graphene oxide, lignin, chitosan, adsorption, sorption capacity, lead, methylene blue.
DOI: 10.30791/1028-978X-2023-8-27-36
Burakov Alexander — Tambov State Technical University (392000 Tambov, Leningradskaya, 1), PhD, assistant professor of the specialist in the field of adsorption technologies and carbon nanomaterials synthesis. E-mail: m-alex1983@yandex.ru.
Mkrtchyan Elina — Tambov State Technical University (392000 Tambov, Leningradskaya, 1), graduate student, specialist in the field of adsorption technologies and nanocomposites synthesis. E-mail: elina.mkrtchyan@yandex.ru.
Burakova Irina — Tambov State Technical University (392000 Tambov, Leningradskaya, 1), PhD, assistant professor, specialist in the field of adsorption technologies and carbon nanomaterials synthesis. E-mail: iris_tamb68@mail.ru.
Ananyeva Oksana — Tambov State Technical University (392000 Tambov, Leningradskaya, 1), student, specialist in the field of adsorption technologies. E-mail:
oksana.a9993471@gmail.com.
Dyachkova Tatyana — Tambov State Technical University (392000 Tambov, Leningradskaya, 1), Dr Sci. (Chem), professor of the Department “Equipment and Technologies of Nanoproduct Manufacture”, specialist in the synthesis of carbon nanomaterials. E-mail: mashtatpetr@mail.ru.
Tkachev Aleksey — Tambov State Technical University (392000 Tambov, Leningradskaya, 1), Dr Sci (Eng), professor, head of the department “Equipment and Technologies of Nanoproduct Manufacture”, specialist in the synthesis of carbon nanomaterials. E-mail: nanotam@yandex.ru.
Burakov A.E., Mkrtchyan E.S., Burakova I.V., Ananyeva O.A., Dyachkova T.P., Tkachev A.G. Struktura i fiziko-himicheskie svojstva nanostrukturirovannogo sorbcionnogo materiala na osnove oksida grafena, modificirovannogo organicheskimi polimerami [Structure and physico-chemical properties of nanostructured sorption material based on graphene oxide modified with organic polymers]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 27 – 36. DOI: 10.30791/1028-978X-2023-8-27-36
Analysis of hardening mechanisms of rail steel
under plastic deformation by uniaxial compression
K. V. Aksenova, V. E. Gromov, E. S. Vashchuk, Yu. F. Ivanov
Using the methods of scanning and transmission electron microscopy, an analysis was made of the evolution of the structure and defective substructure of rail steel under uniaxial compression up to a degree of 50%. It is revealed that the strain hardening has a multistage nature and is accompanied by a decrease in the scalar and excess dislocation density and fragmentation of pearlite grains, which increases with increasing strain. Fracture of cementite plates proceeding through the mechanisms of their dissolution and cutting by mobile dislocations is revealed. On the basis of data on the structural-phase states, the defective substructure of rail steel, obtained by the methods of modern physical materials science, a quantitative analysis of the mechanisms of hardening of rail steel at degrees of compression deformation of 15, 30, 50 % was carried out. It is shown that at the initial stage (e = 15 %), the main strengthening factor of the steel under study is the presence of lamellar pearlite grains, and at high degrees of deformation (e = 50 %), hardening by incoherent particles of the carbide phase. The overall yield strength of steel was estimated in the first approximation, based on the additivity principle, which assumes the independent action of each of the hardening mechanisms. A good qualitative agreement between the experimentally obtained and theoretically calculated values of steel strength has been revealed.
Keywords: rail steel, deformation, uniaxial compression, structure, dislocation substructure, hardening mechanisms, additive yield strength.
DOI: 10.30791/1028-978X-2023-8-37-44
Aksenova Krestina — Siberian State Industrial University (654007 Novokuznetsk, 42 Kirov str.), PhD (Eng.), associate professor, specialist in the field of condensed matter physics. E-mail: 19krestik91@mail.ru.
Gromov Viktor — Siberian State Industrial University (654007 Novokuznetsk, 42 Kirov str.), Dr. Sci. (Phys.-Math.), professor, head of the Chair, specialist in the field of physical materials science of steels and alloys. E-mail: gromov@physics.sibsiu.ru.
Vashchuk Ekaterina — T.F. Gorbachev Kuzbass State Technical University, Prokopyevsk Branch (653039 Prokopyevsk, Nogradskaya 32), PhD (Eng.), associate professor, specialist in the field of condensed matter physics. E-mail: vashuk2012@bk.ru.
Ivanov Yurii — Institute of high–current electronics SB RAS (634055 Tomsk, Akademichesky Avenue, 2/3), Dr. Sci. (Phys.-Math.), prof., chief researcher, specialist in the field of plasma physics and condensed matter physics. E-mail: yufi55@mail.ru.
Aksenova K.V., Gromov V.E., Vashchuk E.S., Ivanov Yu.F. Analiz mekhanizmov uprochneniya rel'sovoj stali pri plasticheskoj deformacii odnoosnym szhatiem [Analysis of hardening mechanisms of rail steel under plastic deformation by uniaxial compression]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 37 – 44. DOI: 10.30791/1028-978X-2023-8-37-44
Electrocatalytic activity in hydrogen evolution reaction
of h-niobium carbide – based composite
M. A. Eryomina, N. V. Lyalina, S. F. Lomayeva, I. K. Averkiev
In this work, the electrocatalytic activity in hydrogen evolution reaction from acidic and alkaline solutions of a new η-carbide Nb3(Fe,Al)3C-based composite was studied. The composite was obtained by spark plasma sintering of mechanically alloyed powders of niobium, aluminium and graphite in steel vials in petroleum ether followed by etching in an alkaline solution or hydrofluoric acid. Composite of 78 wt.% Nb3(Fe,Al)3C, 19 wt.% Nb5Al3Cxand 3 wt. % graphite has a layered structure with a layer thickness of the Nb5Al3Cxphase of 50 – 70 nm. In terms of the magnitude of the hydrogen evolution reaction overpotential, the obtained composite exceeds the undoped Nb2CTxand Nb4C3Tx.
Key words: η-carbide, composites, hydrogen evolution reaction (HER), mechanical alloying.
DOI: 10.30791/1028-978X-2023-8-45-56
Eryomina Marina — Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences (426067 Izhevsk, T. Baramzinoy, 34), PhD (Phys-math), senior researcher, specialist in the field of materials science. E-mail: mrere@mail.ru.
Lyalina Natalia — Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences (426067 Izhevsk, T. Baramzinoy, 34), PhD (Chem), senior researcher, Specialist in the field of physical and chemical methods for studying materials of various functional purposes. E-mail: natalyalina@mail.ru.
Lomayeva Svetlana — Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences (426067 Izhevsk, T. Baramzinoy, 34), Dr. Sci. (Phys-math), Chief Scientific Officer, Specialist in the field of condensed matter physics. E-mail: lomaeva@udman.ru
Averkiev Igor — Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences (426067 Izhevsk, T. Baramzinoy, 34), research assistant, Specialist in the field of materials science and scanning electron microscopy. E-mail: averkiev97@udman.ru.
Eryomina M.A., Lyalina N.V., Lomayeva S.F., Averkiev I.K. Elektrokataliticheskaya aktivnost' kompozita na osnove -karbida niobiya v reakcii vydeleniya vodoroda [Electrocatalytic activity in hydrogen evolution reaction of h-niobium carbide — based composite]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 45 – 56. DOI: 10.30791/1028-978X-2023-8-45-56
Heterometallic (Nickel, Titanium)-dimethylglyoximates
as precursors for nickel titanate coating
I. V. Fadeeva, O. V. Prokopova, E. V. Volchkova,
V. A. Volchenkova, V. B. Smirnova,
F. F. Murzakhanov, S. P. Yuschenko
Heterometallic (nickel, titanium) dimethylglyoximate (II) with a nickel:titanium ratio of 1, was synthesized. based on nickel dimethylglyoximate (I) and titanium tetrachloride TiCl4 in chloroform The obtained complex II was characterized by XRD, IR and EPR spectroscopy, and elemental analysis. It was shown that the synthesized complex II is a solvate. On the basis of the analysis results, an assumption was made about the possible structure of complex II. It was found that the thermal decomposition of complex II starts at 44 °C. A constant mass of the decomposition product is observed in the temperature range of 590 – 850 °C. According to the XRD analysis of the thermolysis product, the main crystalline phase is nickel titanate NiTiO3, it is also present up to 5 wt. % oxides of nickel NiO and titanium TiO2, as well as carbon. Complex II was used to obtain a nickel titanate coating of a corundum substrate. A solution of complex II dissolved in dimethyl sulfoxide was applied to a preliminarily prepared surface of alumina (corundum) by immersing the substrate in the solution, after which firing was carried out at 850 °C, as a result of which the organic part (dimethylglyoxime) (III) pyrolyzed and a coating was formed. According to XRD data, the resulting coating is characterized by the perovskite structure and refers to nickel titanate. An insignificant impurity of the rutile phase was found, the content of which does not exceed 5 wt. %.
Keywords: titanium tetrachloride, dimethylglyoxime complex, XRD, IR and EPR spectra, nickel titanate.
DOI: 10.30791/1028-978X-2023-8-57-67
Fadeeva Inna — Baikov Institut of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49, Russia), PhD, leading researcher, specialist in inorganic chemistry and medical materials science. E-mail: fadeeva_inna@mail.ru.
Prokopova Olga — Russian Technological University — MIREA (119454, Central Federal District, Moscow, Prospekt Vernadskogo, 78), specialist in the field of synthesis of coordination compounds. E-mail: olgaprokopova1998@mail.ru.
Volchkova Elena — Russian Technological University — MIREA (119454, Central Federal District, Moscow, Prospekt Vernadskogo, 78), PhD, specialist in the field of synthesis of coordination compounds, IR spectroscopy. E-mail:. volchkovaev@bk.ru.
Volchenkova Valentina — Baikov Institut of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49, Russia), PhD, leading researcher, specialist in the field of chemical analysis. E-mail: volch.v.a@mail.ru.
Smirnova Valentina — Baikov Institut of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49, Russia), researcher, specialist in the field of chemical analysis. E-mail: v.smirnova48@bk.ru.
Murzakhanov Fadis — Kazan (Volga region) Federal University (420008 Republic of Tatarstan, Kazan, Kremlevskaya str., 18), PhD student, specialist in the field of EPR spectroscopy. E-mail: murzakhanov.fadis@yandex.ru.
Yushchenko Sergey — Institute of Applied Physics of the Academy of Sciences of Republic Moldova (MD-2028 Moldova, Academic st., 5, Chisinau) PhD, researcher, specialist in the field of chemistry of coordination compounds. E-mail: yushenko@phys.asm.md.
Fadeeva I.V., Prokopova O.V., Volchkova E.V., Volchenkova V.A., Smirnova V.B., Murzakhanov F.F., Yuschenko S.P. Geterometallicheskie (nikel', titan)-soderzhashchie dimetilglioksimaty kak prekursory dlya naneseniya pokrytij titanata nikelya [Heterometallic (Nickel, Titanium)-dimethylglyoximates as precursors for nickel titanate coating]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 57 – 67. DOI: 10.30791/1028-978X-2023-8-57-67
Study of oxygen and nitrogen content
in nickel-based plasma coatings
V. I. Kalita, D. I. Komlev, A. A. Radyuk, V. F. Shamraj,
A. B. Mikhajlova, B. A. Rumyancev
Studies were carried out on the oxygen and nitrogen content of nickel-based powders and plasma coatings therefrom. The Ni-based sprayed materials were divided into four groups according to the mechanism of their interaction with oxygen. The first group includes Ni, the second alloys alloyed with Cr, the third additionally alloyed with Al, the fourth alloys having more complex alloying with Cr, C, B, Si elements that actively interact with oxygen, including with the formation of gaseous oxides. Alloying 20 % Cr reduces the oxygen content of the coating by 35 %, alloying 17 % Cr – 10 % Al reduces the oxygen content of the coating by 57 %, more complex alloying 13.5 % Cr – 2.7 % Si – 1.65 % B – 0.36 % C — reduces the oxygen content of the coating by 92 %. Increasing the plasma jet power increases the oxygen content of the Ni20Cr coating from 0.55 to 1.6 %. Increasing the plasma jet power and preheating the substrate prior to sputtering results in a limited increase in the oxygen content of Ni – 17 % Cr – 10 % Al – 1 % Y and Ni – 15 % – Cr 4 % – Fe 0.8 % C – 4.1 % Si — 3.1% B coatings using a plasma nozzle to eliminate the thermal effects of the plasma jet. The Ni – 17 % Cr – 10 % Al – 1 % Y coating sprayed with the nozzle contains 0.48 % O and 0.14 % N instead of 2.31 % O and 0.37 % N when sprayed without the nozzle. An increase in the oxygen and nitrogen content in the coatings Ni, Ni – 20 Cr and Ni – 40 Cr together with the formation of a liquid-hardened structure in these coatings determines an increase in microhardness relative to the value for the powder by 1.6 – 1.9 times.
Key words: plasma, coatings, alloys, nickel, content, oxygen, nitrogen, microhardness.
DOI: 10.30791/1028-978X-2023-8-68-77
Kalita Vasilii — Baikov Institute of Metallurgy and Materials Sciences of RAS (119334 Moscow, Leninsky Prospect, 49), Dr Sci, chief scientific officer, specialist in the field of plasma spraying. E-mail: vkalita@imet.ac.ru.
Komlev Dmitrii — Baikov Institute of Metallurgy and Materials Sciences of RAS (119334 Moscow, Leninsky Prospect, 49), PhD, leading researcher, specialist in the field of plasma spraying. E-mail: imet-lab25@yandex.ru.
Radiuk Aleksei — Baikov Institute of Metallurgy and Materials Sciences of RAS (119334 Moscow, Leninsky Prospect, 49), junior researcher, specialist in the field of plasma spraying.
Shamray Vladimir — Baikov Institute of Metallurgy and Materials Sciences of RAS (119334 Moscow, Leninsky Prospect, 49), Dr Sci (Phys-Math), chief researcher. E-mail:
vshamray@imet.ac.ru.
Mihajlova Aleksandra — Baikov Institute of Metallurgy and Materials Sciences of RAS (119334 Moscow, Leninsky Prospect, 49), PhD, senior researcher, specialist in the field of X-ray analysis.
Rumyantsev Boris — Baikov Institute of Metallurgy and Materials Sciences of RAS (119334 Moscow, Leninsky Prospect, 49), junior researcher. E-mail: rumin_123@mail.ru.
Kalita V.I., Komlev D.I., Radyuk A.A., Shamraj V.F., Mikhajlova A.B., Rumyancev B.A. Issledovanie soderzhaniya kisloroda i azota v plazmennyh pokrytiyah na osnove nikelya [Study of oxygen and nitrogen content in nickel-based plasma coatings]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 68 – 77. DOI: 10.30791/1028-978X-2023-8-68-77
Study of the impurity composition of germanium
tetrafluoride using chromato-mass spectrometry
T. G. Sorochkina, A. D. Bulanov, A. Yu. Sozin, O. Yu. Chernova
For the first time, the impurity composition of GeF4 with a natural content of isotopes and isotopically enriched was studied by chromato-mass spectrometry using adsorption capillary columns. For the identification and determination of impurity substances, their preliminary cryogenic concentration is proposed. Information on the impurity composition of germanium tetrafluoride of various isotopic composition has been expanded. The presence of permanent gases, limiting and unsaturated C3–C9 hydrocarbons, freons, alkylfluorosilanes, fluorochlorogermanes, silicon tetrafluoride, germanium tetrachloride. A total of 32 impurity substances were identified, 29 of which were discovered for the first time.
Keywords: germanium tetrafluoride, impurity concentration, gas chromatography-mass spectrometry, capillary columns.
DOI: 10.30791/1028-978X-2023-8-78-84
Sorochkina Tatiana — Institute of Chemistry of High-Purity Substances named after G.G. Devyatykh of the Russian academy of sciences (603951 Nizhnij Novgorod, ul. Tropinina, 49), PhD (Chem), senior researcher, specialist in the field of analytical chemistry of high-purity volatile substances. E-mail: sorochkina@ihps-nnov.ru.
Bulanov Andrey — Institute of Chemistry of High-Purity Substances named after G.G. Devyatykh of the Russian academy of sciences (603951 Nizhny Novgorod, ul. Tropinina, 49); Lobachevsky Nizhny Novgorod State University, Faculty of Chemistry (603022 Nizhny Novgorod, Gagarin Ave., 23), Dr Sci (Chem), corresponding member of the RAS, Director, specialist in chemistry and technology of high-purity substances and materials. E-mail:
bulanov@ihps-nnov.ru.
Sozin Andrey — Institute of Chemistry of High-Purity Substances named after G.G. Devyatykh of the Russian academy of sciences (603951 Nizhnij Novgorod, ul. Tropinina, 49), Dr Sci (Chem), head of laboratory, specialist in the field of analytical chemistry of high-purity volatile substances. E-mail: sozin@ihps-nnov.ru.
Chernova Olga — Institute of Chemistry of High-Purity Substances named after G.G. Devyatykh of the Russian academy of sciences (603951 Nizhnij Novgorod, ul. Tropinina, 49), leading engineer, specialist in the field of analytical chemistry of high-purity volatile substances. E-mail: chernova@ihps-nnov.ru.
Sorochkina T.G., Bulanov A.D., Sozin A.Yu., Chernova O.Yu. Issledovanie primesnogo sostava tetraftorida germaniya metodom hromato-mass-spektrometrii [Study of the impurity composition of germanium tetrafluoride using chromato-mass spectrometry]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 8, pp. 78 – 84. DOI: 10.30791/1028-978X-2023-8-78-84
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