PERSPEKTIVNYE MATERIALY, 2022,  No. 8

Phase equilibria, growth and properties of crystals
in the CsCl – CoCl2 – H2O system


V. A. Komornikov, A. V. Gudymenko, I. S. Timakov,
 A. A. Kulishov


The study of phase formation in the system CsCl CoCl2 H2O at 25 °C was carried out for the first time. The concentration ranges of crystallization and the nature of solubility were determined for five compounds: CsCl, Cs3CoCl5, Cs2CoCl4, CsCoCl3·2H2O, and CoCl2·6H2O. It has been established that the Cs3CoCl5 crystal is incongruently soluble (in a slight excess of CsCl), the Cs2CoCl4crystal is congruently soluble, and the CsCoCl3·2H2O crystal is incongruently soluble (in a significant excess of CoCl2·6H2O). Single crystals of double cesium-cobalt chlorides were obtained for the first time by the method of isothermal evaporation. The size and quality of the obtained crystals made it possible to indicate the external faceting of the crystals. It has been established that the method of obtaining crystals based on a controlled decrease in the temperature of a saturated solution is not suitable for double cesium-cobalt chlorides due to their weak temperature dependence of solubility. The optical spectra of double cesium-cobalt chloride crystals were studied in the range of 200 – 800 nm. It has been established that the transmission spectra of the Cs3CoCl5 and Cs2CoCl4crystals are largely close to each other, while the transmission spectrum of the CsCoCl3·2H2O crystal differs from them. Such spectral characteristics are primarily due to the structure of the nearest coordination environment of cobalt atoms in the structures of the studied crystals. In Cs3CoCl5and Cs2CoCl4 crystals, cobalt atoms are in a tetrahedral chlorine environment ([CoCl4]), while in a CsCoCl3·2H2O crystal they are in an octahedral water–chlorine environment ([CoCl4(H2O)2]).


Keywords: phase equilibria, crystal growth, optical spectrum of crystals.


DOI: 10.30791/1028-978X-2022-8-5-13

Komornikov Vladimir — Federal Scientific Research Centre “Crystallography and Photonics” of Russian academy of sciences, Shubnikov Institute of Crystallography RAS (Moscow, 119334, Leninskiy av., 59), PhD (Chem), Senior Researcher, crystal growth specialist. E-mail: v.a.kom@mail.ru.

Gudymenko Alexey — Federal Scientific Research Centre “Crystallography and Photonics” of Russian academy of sciences, Shubnikov Institute of Crystallography RAS (Moscow, 119334, Leninskiy av., 59), laboratory assistant, undergraduate.

Timakov Ivan — Federal Scientific Research Centre “Crystallography and Photonics” of Russian academy of sciences, Shubnikov Institute of Crystallography RAS (Moscow, 119334, Leninskiy av., 59), junior researcher, crystal growth specialist.

Kulishov Artem — Federal Scientific Research Centre “Crystallography and Photonics” of Russian academy of sciences, Shubnikov Institute of Crystallography RAS (Moscow, 119334, Leninskiy av., 59), junior researcher, crystal growth specialist.

Komornikov V.A., Gudymenko A.V., Timakov I.S., Kulishov A.A. Fazovye ravnovesiya, rost i svojstva kristallov v sisteme CsCl – CoCl2 – H2O [Phase equilibria, growth and properties of crystals in the CsCl – CoCl2 – H2O system].Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 5 – 13. DOI: 10.30791/1028-978X-2022-8-5-13

Electrophysical properties of composites
based on low density polyethylene and zeolite meneral,
modified by gamma radiation


M. N. Bayramov, N. Sh. Aliev


Dielectric parameters (ε′, tgδ) and electrical conductivity (σ) of composite samples of LDPE 60 vol. %/Zeolite 40 vol.% and LDPE 40 vol. %/Zeolite 60 vol. % γ-irradiation dose of 50 – 300 kGy in air, was measured in the temperature range 293 – 403 K and at frequencies 25 – 106 Hz. Composites based on a homogeneous mixture of LDPE with powdered natural zeolite (clinoptilolite and heulandite — Agdag deposits, Azerbaijan) were obtained in the form of film samples 140 – 200 μm thick and 20 mm in diameter by hot pressing at a temperature of 403 – 413 K and a pressure of 15 MPa, followed by quenching them in an ice-water mixture. The temperature dependence of the electrophysica parameters of the composite samples made it possible to reveal that the real part of the dielectric constant (ε’), dielectric losses tgδ and electrical conductivity с decrease with an increase in the filler content, and this is associated with an increase in the concentration of charge carriers and their mobility after exposure to γ-irradiation with a dose 50 – 300 kGy. The study of the frequency dependences ε′ = ƒ(lgν), tgδ = ƒ(lgν) and lgσ = ƒ(lgν) of the samples modified by g-irradiation showed the presence of two linear regions of the frequency dependences of the electrical conductivity, observed as in unirradiated samples, which have lower values ​​and change according to the law σac(ν) ~ ν0.73, and this is more consistent with the hopping mechanism of electrical conductivity of LDPE / zeolite composites.


Key words:polymer composite, polyethylene, zeolite, modification, γ-irradiation, real part of dielectric constant, dielectric loss angle, electrical conductivity, temperature and frequency dependence.


DOI: 10.30791/1028-978X-2022-8-14-25

 

Bayramov Mazahir Nasraddin oglu — Institute of Radiation Problems of the National Academy of Sciences of Azerbaijan (Baku, Azerbaijan, AZ1143, B. Vahabzade str., 9), PhD (Phys), senior researcher, specialist in the development of composite materials, as well as nanocomposites based on epoxy resins, thermoplastics and magnetic nanofillers, radiothermoluminescence of polymer compositions and radiation materials science. E-mail: m.bayramov51@mail.ru.

Aliyev Nabi Shamshad oglu —Institute of Radiation Problems of the National Academy of Sciences of Azerbaijan (Baku, Azerbaijan, AZ1143, B. Vahabzade str., 9), PhD (Phys), senior researcher, specialist in dielectric and thermoactivation spectroscopy, radio thermoluminescence of polymer composition, physical chemistry and radiation materials science. E-mail: nabi.aliyev.1958 @ mail.ru.

Bayramov M.N., Aliev N.Sh. Elektrofizicheskie svojstva kompozitov na osnove polietilena nizkoj plotnosti i ceolitovogo menerala, modificirovannyh gamma-izlucheniem [Electrophysical properties of composites based on low density polyethylene and zeolite meneral, modified by gamma radiation]. ]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 14 – 25. DOI: 10.30791/1028-978X-2022-8-14-25

 

A mixed-ligand complex of nickel trimesinate
with 1,10-phenanthroline as an adsorbent
for organic dyes and a precursor
of nanostructured materials


V. A. Zhinzhilo, K. V. Slepova, I. E. Uflyand


Metal-organic frameworks based on nickel and cobalt trimesinates were synthesized according to a modified procedure by the interaction of nickel acetate or cobalt nitrate and trimesic acid in the presence of alkali. They have been used to extract the organic Congo red and methylene blue dyes from their aqueous solutions. The degree of adsorption depends on temperature and reaches 97 % for Congo red, while for methylene blue it is about 83 %. The mechanisms and characteristic parameters of the adsorption process are analyzed using empirical models of the isotherms of Langmuir, Temkin, and Freundlich, of which the most optimal adsorption process is described by the Freundlich model. The calculated thermodynamic parameters indicate a spontaneous process in the case of nickel trimesinate, while for cobalt trimesinate the adsorption of Congo red is spontaneous, and the adsorption of methylene blue is a forced process.


Keywords:mixed-ligand complexes, pollutants, adsorption, thermolysis, nanostructured materials.


DOI: 10.30791/1028-978X-2022-8-26-35

Zhinzhilo Vladimir — Southern Federal University (Rostov-on-don, 344090, Zorge str., 7), PhD (Chem.), senior lecturer, specialist in nanomaterials and chemical analysis. E-mail:
i06993@yandex.ru.

Slepova Ksenia — Southern Federal University (Rostov-on-don, 344090, Zorge str., 7), student, specialist in chemical analysis. E-mail: kslepova12@gmail.com.

Uflyand Igor — Southern Federal University (Rostov-on-don, 344090, Zorge str., 7), Dr.Sc. (Chem.), professor, head of cheir of analytical chemistry, specialist in nanomaterials and chemical analysis. E-mail: ieuflyand@sfedu.ru.

Zhinzhilo V.A., Slepova K.V., Uflyand I.E. Smeshanno-ligandnyj kompleks trimezinata nikelya s 1,10-fenantrolinom kak adsorbent dlya organicheskih krasitelej i prekursor nanostrukturirovannyh materialov [A mixed-ligand complex of nickel trimesinate with 1,10-phenanthroline as an adsorbent for organic dyes and a precursor of nanostructured materials].Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 26 – 35. DOI: 10.30791/1028-978X-2022-8-26-35

 

Formation of composites with a hydrogel
matrix filled with cobalt ferrite/piezoelectric
magnetoelectric elements
by stereolitographic 3D printing


S. A. Tikhonova, P. V. Evdokimov, V. I. Putlyaev,
D. O. Golubchikov, A. M. Murashko,
N. V. Leontiev, Ya. Yu. Filippov, I. M. Shcherbakov


The results of the formation of composite bone implants filled with magnetoelectric elements (MEs) magnetostrictor/piezoelectric by stereolithographic 3D printing are presented. Such implants are capable of generating local electric fields under the action of an external magnetic field, creating an additional electrical stimulus for bone tissue regeneration. CoFe2O4was used as a magnetostrictive material, and BaNiO3, Na0.5K0.5NBO3, and BiFeO3 were used as piezoelectric materials. Magnetoelectric elements filled hydrogel matrix based on a photopolymerized polyethylene glycol diacrylate (PEGDA) monomer. The main problems of stereolithographic formation of macroporous composites are associated with very strong absorption of UV radiation (405 nm) by monomer suspensions, containing CoFe2O4and BiFeO3 particles.


Keywords:osteoconductive implant, magnetoelectric elements, cobalt ferrite, barium titanate, sodium potassium niobate, bismuth ferrite, hydrogel, bioceramics, stereolithography.


DOI: 10.30791/1028-978X-2022-8-36-47

Tikhonova Snezhana —Lomonosov Moscow State University, Department of Materials Sciences, (Moscow, 119991, Leninskiye Gory 1), PhD student, specialist in composite biomaterials and 3D printing. E-mail: kurbatova.snezhana@yandex.ru.

Evdokimov Pavel — Institute of General and Inorganic Chemistry of the Russian academy of sciences (Moscow, 119334, Leninsky Prospekt, 31); Lomonosov Moscow State University (119191, Moscow, Leninskiye Gory 1, building 3), PhD in chemistry, researcher, specialist in the field of bioceramics, calcium phosphate sintering. E-mail: pavel.evdokimov@gmail.com.

Putlayev Valery — Lomonosov Moscow State University, Chemistry Department (119991, Moscow, Leninski Gory, 1, bd. 3, GSP-1), assoc. prof., expert in chemistry of inorganic materials. E-mail: valery.putlayev@gmail.com.

Golubchikov Daniil — Lomonosov Moscow State University, Department of Materials Sciences, (Moscow, 119991, Leninskiye Gory 1), student, specialist in the field of composite biomaterials and 3D printing. E-mail: dddannn2113@gmail.com.

Murashko Albina — Lomonosov Moscow State University, Department of Materials Sciences, (Moscow, 119991, Leninskiye Gory 1, building 73, Laboratory building B), student, specialist in the field of bioceramics and stereolithographic printing. E-mail: amur2908@gmail.com.

Leontiev Nikolai — Lomonosov Moscow State University, Chemistry department (119991, Moscow, Leninski Gory, 1, bd. 3, GSP-1), student, specialist in the field of ceramic osteoconductive materials and 3D printing. E-mail: ganzauskas@ya.ru.

Filippov Yaroslav — Lomonosov Moscow State University, (119991, Moscow, Leninskiye Gory, 1), PHD in chemistry, senior researcher, specialist in the field of the development of new materials. E-mail: filippovya@gmail.com.

Shcherbakov Ivan — Lomonosov Moscow State University (119991, Moscow, Leninskiye Gory 1), assistant of the Department of General and Specialized Surgery of the FFM MSU, specialist in the field of bone tissue regeneration. E-mail: imscherbackov@yandex. ru.

Tikhonova S.A., Evdokimov P.V., Putlyaev V.I., Golubchikov D.O., Murashko A.M., Leontiev N.V., Filippov Ya.Yu., Shcherbakov I.M. Formirovanie kompozitov s gidrogelevoj matricej, napolnennyh magnitoelektricheskimi elementami ferrit kobal'ta/p'ezoelektrik, metodom stereolitograficheskoj 3D-pechati [Formation of composites with a hydrogel matrix filled with cobalt ferrite/piezoelectric magnetoelectric elements by stereolitographic 3D printing]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 36 – 47. DOI: 10.30791/1028-978X-2022-8-36-47

 

Composite material carboxymethylcellulose –
graphene oxide decorated with iron nanoparticles
for sorption removal of heavy metal ions
from polluted aqueous media


E. A. Neskoromnaya, A. V. Melezhyk, E. S. Mkrtchan,
A. E. Memetova, A. V. Babkin


The paper presents an easy-to-implement and cheap technology for the synthesis of an effective sorption material based on graphene oxide, carboxymethylcellulose and iron nanoparticles. The synthesized nanocomposite is a partially ordered structure corresponding to the reduced graphene oxide, superficially modified with a layer of carboxymethyl cellulose (CMC). Iron nanoparticles of various structures and sizes have been identified in the structure of the synthesized material. The structures of the resulting composite and the raw materials were studied using the methods of SEM, TEM, XRD, and IR-Fourier spectroscopy. The presence of iron particles in the structure of the material in various forms (Fe2O3, FeO, Fe0) was shown. Sorption properties of the synthesized nanocomposite have been studied. The effect of the pH of the solution and the weight of the adsorbent suspension on its sorption activity during the extraction of Pb and Zn ions from aqueous solutions has been studied. The synthesized material demonstrates the greatest sorption activity at pH = 6 and the weight of the sample m = 1 mg. During the experimental analysis of the kinetics of the process, high values of the sorption activity of the synthesized material were established (for Pb ions — 680 mg·g–1, Zn ions — 387 mg·g–1). The obtained kinetic curves are best described by a pseudo-second-order model. The synthesized composite material can be successfully used for the adsorption of heavy metals from polluted aqueous media.


Keywords: graphene oxide, carboxymethylcellulose, iron nanoparticles, hydrothermal carbonization, sorption, heavy metals.


DOI: 10.30791/1028-978X-2022-8-48-60

Neskoromnaya Elena — Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian academу of sciences (Moscow, 119334, ul. Kosygina, 19), PhD, senior researcher, specialist in the field of adsorption processes and synthesis of carbon nanocomposite materials. E-mail: lenok.n1992@mail.ru.

Melezhik Alexander — Tambov State Technical University (Tambov, 392000, ul. Leningradskaya, 1), PhD, senior researcher, specialist in the synthesis of carbon nanomaterials. E-mail: nanocarbon@rambler.ru.

Mkrtchyan Elina — Tambov State Technical University (Tambov, 392000, ul. Leningradskaya, 1), graduate student, specialist in adsorption technologies and carbon nanomaterials synthesis. E-mail: elina.mkrtchyan@yandex.ru.

Memetova Anastasia — Tambov State Technical University (Tambov, 392000, ul. Leningradskaya, 1), PhD, senior researcher, specialist in the field of adsorption technologies and carbon nanomaterials synthesis. E-mail: anastasia.90k@mail.ru.

Babkin Alexander —Lomonosov Moscow State University (Moscow, 119991, ul. Leninskiye gory, 1), PhD, senior researcher, specialist in the field of adsorption technologies and carbon nanomaterials synthesis; Federal State Research and Design Institute of Rare Metal Industry “Giredmet” (Moscow, 111524, Elektrodnaya ul., 2, bd. 1), leading researcher of the Testing Analytical and Certification Center. E-mail: flex_trol@mail.ru.

Neskoromnaya E.A., Melezhyk A.V., Mkrtchan E.S., Memetova A.E., Babkin A.V. Kompozicionnyj material karboksimetilcellyuloza – oksid grafena, dekorirovannyj nanochasticami zheleza dlya sorbcionnogo udaleniya ionov tyazhelyh metallov iz zagryaznennyh vodnyh sred [Composite material carboxymethylcellulose – graphene oxide decorated with iron nanoparticles for sorption removal of heavy metal ions from polluted aqueous media]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 48 – 60. DOI: 10.30791/1028-978X-2022-8-48-60

 

Investigation of thermal stability
and mechanical properties of composite
wire obtained by the Al – 0.25 % Zr – 0.1 % (Sc,Hf)
aluminum alloys


I. S. Shadrina, A. V. Nokhrin, V. N. Chuvil’deev,
V. I. Kopylov, A. A. Bobrov, N. N. Berendeev,
 A. V. Piskunov, A. A. Murashov, N. Y. Tabachkova


The thermal stability of a bimetallic wire made of four novel aluminum alloys Al – 0.25 % Zr with different Sc and Hf contents has been investigated. A wire made of pure aluminum A99 was studied as an object of comparison. Alloys were obtained by injection molding in vacuum. Cast samples were subjected to severe plastic deformation and annealing, which ensured the formation of a uniform microstructure and the release of stabilizing Al3(Zr,Sc,Hf) nanoparticles. The wire Æ 0.26 mm was obtained by joint deformation of an aluminum alloy with a copper shell by rolling in rolls. The effect of 30-minute annealing in the temperature range from 200 to 500 °C on the parameters of the microstructure and physical and mechanical properties (microhardness, strength, plasticity, specific electrical resistivity) of the wire was studied. The wire has high strength and increased thermal stability. After annealing at a temperature of 500 °C, a homogeneous fine-grained structure with a grain size of 3 – 5 mm was formed in the wire, increased hardness and strength of the samples was observed due to the separation of Al3(Zr,Sc,Hf) particles. There is an intense diffusion of copper from the shell into the surface layers of the aluminum alloy, which can lead to embrittlement of the wire.


Keywords: aluminum alloys, microalloying, hardness, electroconductivity, zirconium, scandium, hafnium.


DOI: 10.30791/1028-978X-2022-8-61-75

Shadrina Iana — Lobachevsky National Research University of Nizhny Novgorod (603022, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), PhD student, engineer, specialist in aluminum alloys study. E-mail: janashadr@gmail.com.

Nokhrin Aleksey — Lobachevsky National Research University of Nizhny Novgorod (603022, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), Dr Sci (Phys-Math), head of the laboratory, specialist in the field of diffusion processes in metals and alloys. E-mail: nokhrin@nifti.unn.ru.

Chuvil’deev Vladimir —Lobachevsky National Research University of Nizhny Novgorod PTRI UNN (603950, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), Dr Sci (Phys-Math), professor, director of Physical and Technical Research Institute UNN, specialist in the field of diffusion processes in metals and alloys. Email: chuvildeev@nifti.unn.ru.

Kopylov Vladimir —Lobachevsky National Research University of Nizhny Novgorod (603022, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), PhD, leading researcher, specialist in the severe plastic deformation methods. E-mail: kopylov.ecap@gmail.com.

Bobrov Aleksandr — Lobachevsky National Research University of Nizhny Novgorod (603022, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), engineer, specialist in casting of metals and alloys. E-mail: aabobrov@bk.ru.

Berendeev Nikolay —Lobachevsky National Research University of Nizhny Novgorod (603022, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), PhD, senior researcher, specialist in mechanical test. E-mail: earl13@mail.ru.

Piskunov Aleksandr —Lobachevsky National Research University of Nizhny Novgorod (603022, Nizhny Novgorod, 23/3 Gagarin Ave, UNN), junior researcher, specialist in SEM. E-mail: avpiskunov@nifti.unn.ru.

Murashov Artem — Lobachevsky National Research Institute of Nizhny Novgorod State University (603022, Nizhny Novgorod, 23/3 Gagarin ave, UNN), graduate student, engineer, specialist in the SEM. E-mail: aamurashov@nifti.unn.ru.

Tabachkova Nataliya — National University of Science and Technology “MISIS” (119049, Moscow, Leninskiy ave., 4, NUST “MISIS”), PhD, associate professor, specialist in the TEM. E-mail: ntabachkova@gmail.com.

Shadrina I.S., Nokhrin A.V., Chuvil’deev V.N., Kopylov V.I., Bobrov A.A., Berendeev N.N., Piskunov A.V., Murashov A.A., Tabachkova N.Y. Issledovanie termicheskoj stabil'nosti struktury i mekhanicheskih svojstv kompozitnoj provoloki iz alyuminievyh splavov Al – 0,25 % Zr – 0,1 % (Sc,Hf) [Investigation of thermal stability and mechanical properties of composite wire obtained by the Al – 0.25 % Zr – 0.1 % (Sc,Hf) aluminum alloys].Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 61 – 75. DOI: 10.30791/1028-978X-2022-8-61-75

 

Production of ceramic composites based
on silicon nitride powder with sintering
additive precipitated


P. V. Andreev, P. D. Drozhilkin, E. E. Rostokina,
S. S. Balabanov, L. S. Alekseeva, M. S. Boldin,
A. A. Murashov, G. V. Scherbak, V. V. Grebenev, K. O. Karazanov


The process of spray drying synthesis of the charge compositions based on silicon nitride α-Si3N4 with organic compounds of aluminum and yttrium in the molar ratio of 3:5 (stoichiometry of yttrium-aluminum garnet) as the sintering additive is considered. The sintered compositions 91.5 % wt. Si3N4 + 8.5 % wt. additive (in terms of garnet) were investigated by X-ray diffraction analysis and scanning electron microscopy as well as by the methods of thermal analysis. The charge compositions were annealed in four stages up to a temperature of 1000℃ in order to decompose organics and form the oxide phase of the sintering additive. High-speed (100 °C/min) spark plasma sintering (SPS) technology was used to produce 10 mm ceramic samples in vacuum, under uniaxial pressure of 70 MPa. The microstructure, mechanical properties and phase composition of ceramics were investigated. Influence of preliminary annealing of charge compositions on structure, phase composition and physical-mechanical properties of ceramics were studied. It is established that preliminary multistage annealing of charge compositions influences the SPS kinetics as well as the density and phase composition of the ceramic. It has been established that the kinetics of SPS of the pre-annealed powders has two-stage character of the shrinkage. In this case denser ceramic microstructure is formed than in the case of reaction synthesis of sintering additive (for charge composition without pre annealing) during the SPS, but pre annealing slows down the growth of elongated β-Si3N4 grains and the volume of sintering additive phase increases. It is shown that in the case of sintering ceramics from unannealed charge compositions the material has lower density but higher hardness. Based on the Yang-Kutler model, the activation energy of the SPS process is determined and it is shown that the compaction kinetics of Si3N4 with sintering additive powders is determined by the intensity of viscous flow of the oxide phase on the grain boundaries of ceramics.


Keywords: silicon nitride, yttrium-aluminum garnet, deposition, reaction synthesis, spark plasma sintering, hardness, crack resistance.


DOI: 10.30791/1028-978X-2022-8-76-88

Andreev Pavel — Institution of Chemistry of High-Purity Substances named after G.G. Devyatykh, Russian Academy of Sciences (603137, Nizhny Novgorod, Tropinin street, 49), senior researcher, PhD (Phys-Math), specialist in methods of X-ray diffraction analysis. E-mail: andreev@phys.unn.ru.

Drozhilkin Pavel — Physical and Technical Research Institution of Nizhny Novgorod State University named after N.I. Lobachevsky (603950, Nizhny Novgorod, Gagarin Avenue, 23/3), laboratory assistant, graduate student, specialist in methods of X-ray diffraction analysis. E-mail: pddrozhilkin@yandex.ru.

Rostokina Elena — Institution of Chemistry of High-Purity Substances named after G.G. Devyatykh, Russian Academy of Sciences (603137, Nizhny Novgorod, Tropinin street, 49), senior researcher, PhD (Chem), specialist in high-temperature synthesis of nanopowders, rostokina@ihps.nnov.ru.

Balabanov Stanislav —Institution of Chemistry of High-Purity Substances named after G.G. Devyatykh, Russian Academy of Sciences (603137, Nizhny Novgorod, Tropinin street, 49), senior researcher, PhD (Chem), specialist in high-temperature synthesis of nanopowders. E-mail: balabanov@ihps.nnov.ru.

Alekseeva Lyudmila — Physical and Technical Research Institution of Nizhny Novgorod State University named after N.I. Lobachevsky (603950, Nizhny Novgorod, Gagarin Avenue, 23/3), junior researcher, specialist in chemical synthesis of nanopowders. E-mail: golovkina_lyudmila@mail.ru.

Boldin Maxim — Physical and Technical Research Institution of Nizhny Novgorod State University named after N.I. Lobachevsky (603950, Nizhny Novgorod, Gagarin Avenue, 23/3), researcher, head of the laboratory, PhD (Phys-Math), specialist in spark plasma sintering of metals, ceramics and hard alloys. E-mail:
boldin@nifti.unn.ru.

Murashov Artem — Physical and Technical Research Institution of Nizhny Novgorod State University named after N.I. Lobachevsky (603950, Nizhny Novgorod, Gagarin Avenue, 23/3), engineer, PhD student, specialist in scanning electron microscopy. E-mail: aamurashov@nifti.unn.ru.

Shcherbak Gleb —– Physical and Technical Research Institution of Nizhny Novgorod State University named after N.I. Lobachevsky (603950, Nizhny Novgorod, Gagarin Avenue, 23/3), laboratory assistant, graduate student, specialist in measuring physical and mechanical properties of ceramics. E-mail: kod.sherbak@yandex.ru.

Grebenev Vadim — Institution of Crystallography named after A.V. Shubnikov, Federal Research Center for Crystallography and Photonics, Russian Academy of Sciences (119333, Moscow, Leninsky Avenue, 59), senior researcher, PhD (Phys-Math), specialist in differential scanning calorimetry. E-mail: vadim_grebenev@mail.ru.

Karazanov Kirill — Physical and Technical Research Institution of Nizhny Novgorod State University named after N.I. Lobachevsky (603950, Nizhny Novgorod, Gagarin Avenue, 23/3), laboratory assistant, specialist in spark plasma sintering of metals, ceramics and hard alloys. E-mail: karazanov.kirill@mail.ru.

Andreev P.V., Drozhilkin P.D., Rostokina E.E., Balabanov S.S., Alekseeva L.S., Boldin M.S., Murashov A.A., Scherbak G.V., Grebenev V.V., Karazanov K.O. Izgotovlenie keramicheskih kompozitov na osnove poroshka nitrida kremniya s osazhdennoj spekayushchej dobavkoj [Production of ceramic composites based on silicon nitride powder with sintering additive precipitated]. ]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2022, no. 8, pp. 76 – 88. DOI: 10.30791/1028-978X-2022-8-76-88