PERSPEKTIVNYE MATERIALY
2020, №07
Predictions of chalcospinels with composition
ABCX4 (X – S or Se)
N. N. Kiselyova, V. A. Dudarev, V. V. Ryazanov, O. V. Sen’ko, A. A. Dokukin
New chalcospinels of the most common compositions were predicted: AIBIIICIVX4(X — S or Se) and AIIBIIICIIIS4 (A, B, and C are various chemical elements). They are promising for the search for new materials for magneto-optical memory elements, sensors and anodes in sodium-ion batteries. The parameter “a” values of their crystal lattice are estimated. When predicting only the values of chemical elements properties were used. The calculations were carried out using machine learning programs that are part of the information-analytical system developed by the authors (various ensembles of algorithms of: the binary decision trees, the linear machine, the search for logical regularities of classes, the support vector machine, Fisher linear discriminant, the k-nearest neighbors, the learning a multilayer perceptron and a neural network), — for predicting chalcospinels not yet obtained, as well as an extensive family of regression methods, presented in the scikit-learn package for the Python language, and multilevel machine learning methods that were proposed by the authors — for estimation of the new chalcospinels lattice parameter value). The prediction accuracy of new chalcospinels according to the results of the cross-validation is not lower than 80%, and the prediction accuracy of the parameter of their crystal lattice (according to the results of calculating the mean absolute error (when cross-validation in the leave-one-out mode)) is ± 0.1 Å. The effectiveness of using multilevel machine learning methods to predict the physical properties of substances was shown.
Keywords:chalcospinel, crystal lattice parameter, prediction, machine learning.
DOI: 10.30791/1028-978X-2020-7-5-18
Kiselyova Nadezhda — Baikov Institute of Metallurgy and Materials Sciences of Russian Academy of Sciences (119334 Moscow, Russia, Leninskii Prospect, 49), Dr Sci (Chem), chief researcher, specialist in the application of information technologies (IT) to chemistry and materials science. E-mail: kis@imet.ac.ru.
Dudarev Victor — Higher School of Economics (National Research University), (101000 Moscow, Russia, 20 Myasnitskaya Ulitsa), PhD (Eng), associate professor; Baikov Institute of Metallurgy and Materials Sciences of Russian Academy of Sciences (119334 Moscow, Russia, Leninskii Prospect, 49), leading researcher, IT specialist. E-mail: vic@imet.ac.ru.
Ryazanov Vladimir — Federal Research Center Computer Science and Control of the Russian Academy of Sciences (119333 Moscow, Russia, ul. Vavilova, 40), Dr Sci (Phys-Math), professor, chief researcher, machine learning specialist. E-mail: rvvccas@mail.ru.
Sen’ko Oleg — Federal Research Center Computer Science and Control of the Russian Academy of Sciences (119333 Moscow, Russia, ul. Vavilova, 40), Dr Sci (Phys-Math), professor, leading researcher, machine learning specialist. E-mail: senkoov@mail.ru.
Dokukin Aleksandr — Federal Research Center Computer Science and Control of the Russian Academy of Sciences (119333 Moscow, Russia, ul.Vavilova, 40), PhD (Phys-Math), senior researcher; Baikov Institute of Metallurgy and Materials Sciences of Russian Academy of Sciences (119334 Moscow, Russia, Leninskii Prospect, 49), leading researcher, machine learning specialist. E-mail: alex_dok@mail.ru.
Reference citing:
Kiselyova N.N., Dudarev V.A., Ryazanov V.V., Sen’ko O.V., Dokukin A.A. Prognozirovanie hal'koshpinelej sostava ABCX4 (X — S ili Se). [Predictions of chalcospinels with composition ABCX4 (X – S or Se)]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 5 – 18. DOI: 10.30791/1028-978X-2020-7-5-18
Yttrium effect on the structural-phase state in situ
of Mo – 15.3 V – 10.5 Si composite
A. V. Larionov, K. V. Pikulin, S. V. Zhidovinova, L. Yu. Udoeva
The effect of yttrium on the structural-phase state of the Mo – 15.3 V – 10.5 Si hypereutectic alloy has been investigated using X-ray phase analysis and scanning electron microscopy with energy-dispersive X-ray analysis. It has been established that the main phases of Mo – (14.3 – 15.4) V – (9.8 – 10.6) Si – (0.3 – 5.3) Y alloys obtained under nonequilibrium crystallization are the metal solid solution (Mo1 – xVx)ss-matrix, silicide solid solution (Mo1 – xVx)3Si and silicide Y5Si3. In alloys doped with yttrium up to 1.0 at. %, the space between the dendrites of the (Mo1 – xVx)ssmetal phase is filled with (Mo1 – xVx)3Si solid solution, and Y5Si3 is located at the boundaries of the metal solid solution. At a concentration of yttrium in alloys above 3.0 at. % the space between (Mo1 – xVx)ssdendrites is filled with Y5Si3 silicide, inside which (Mo1 – xVx)3Si grains are formed. Triple or quaternary compounds containing yttrium were not detected. Elemental composition of alloy phases of the Mo – (14.3 – 15.4) V – (9.8 – 10.6) Si – (0.3 – 5.3) Y alloys is almost identical and is characterized by non-stoichiometry with respect to silicon. According to well-known literature data, the silicon contents in the (Mo1 – xVx)ssand (Mo1 – xVx)3Si phases are within the acceptable limits of the homogeneity region, and the silicon concentration in Y5Si3 (≈ 35.4 at.%) is beyond the established limits. Doping of the Mo – 15.3 V – 10.5 Si alloy with yttrium increases the dispersion of the structure. Particles of the main structural components become close in size. Wherein the volume ratio of the metallic phase to the silicide with increasing yttrium content in the alloys increases. The density of alloys varies between 8.7 – 9.0 g/cm3.
Keywords:molybdenum, vanadium, silicon, yttrium, in situ composite, hypoeutectic composition, phase composition, microstructure, density, microhardness.
DOI: 10.30791/1028-978X-2020-7-19-28
Larionov Aleksei — Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences (101, Amundsen st., Ekaterinburg, Russia, 620016), PhD, senior researcher, specialist in the field of reduction processes in the metallurgy of alloys and ligatures based on rare refractory metals. E-mail: a.v.larionov@ya.ru.
Pikulin Kirill — Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences (101, Amundsen st., Ekaterinburg, Russia, 620016), researcher, specialist in the field of high temperature synthesis of refractory materials. E-mail: pikulin.imet@gmail.com.
Zhidovinova Svetlana — Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences (101, Amundsen st., Ekaterinburg, Russia, 620016), PhD, senior researcher, specialist in the field of X-ray analysis and metallography. E-mail: zhysv@yandex.ru.
Udoeva Liudmila — Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences (101, Amundsen st., Ekaterinburg, Russia, 620016), PhD, senior researcher, specialist in the field of chemistry and metallurgy of rare metal alloys. E-mail: lyuud@yandex.ru.
Reference citing:
Larionov A.V., Pikulin K.V., Zhidovinova S.V., Udoeva L.Yu. Vliyanie ittriya na strukturno-fazovoe sostoyanie in situ kompozita Mo – 15,3 V – 10,5 Si [Yttrium effect on the structural-phase state in situ of Mo – 15.3 V – 10.5 Si composite]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 19 – 28. DOI: 10.30791/1028-978X-2020-7-19-28
Effect of highly porous bioceramics based on ZrO2 – Y2O3– CeO2 system on the biological tissues of experimental animals
M. V. Kalinina, N. Yu. Kovalko, D. N. Suslov, Yu. S. Andozhskaia, O. V. Galibin, O. A. Shilova
By reverse co-deposition of hydroxides synthesized highly dispersed powder (the average size 8 – 10 nm) of the composition (ZrO2)0.92(Y2О3)0.03(СеО2)0.05, based on it use comprehensive a blowing agent and mechanical activation of the obtained highly porous ceramics (average grain size 60 – 65 nm). The synthesized ceramic material-an implant with an open porosity of 55 % and a pore size of 40 – 800 nm was placed in the body of laboratory animals. The reaction of biological tissues of experimental animals to the introduction of plates made of composite highly porous materials based on t-ZrO2 15 months after their implantation was studied. It is revealed that enhanced revascularization is registered in capsules, and perfusion of tissues is registered in intact zone of ceramics introduction. The possibility of germination of vessels in soft tissues into the available pore space of ceramics is shown. The results obtained in vivo suggest that porous bioceramics based on t-ZrO2can be used in the production of endoprostheses and implants in such areas of medicine as orthopedics and traumatology.
Keywords: inverse co-precipitation, ultra-fine powders, highly porous bioceramics on the basis oft-ZrO2, in vivo, implants, implants.
DOI: 10.30791/1028-978X-2020-7-29-39
Kalinina Marina — Grebenschikov Institute of Silicate Chemistry of Russian Academy of Sciences (199034, Saint-Petersburg, Makarova naberezhnaya 2), PhD, senior researcher, specialist in physical and chemical properties of nanocrystalline oxide materials. E-mail: tikhonov_p-a@mail.ru.
Koval’ko Nadezhda — Grebenschikov Institute of Silicate Chemistry of Russian Academy of Sciences (199034, Saint-Petersburg, Makarova naberezhnaya 2), junior researcher, specialists in the field of synthesis and physicochemical properties of nanocrystalline oxide materials. E-mail: kovalko.n.yu@gmail.com.
Suslov Dmitrii — Russian scientific center of radiology and surgical technologies named after acad. A.M. Granov (197758, St.-Petersburg, pos. Pesochnii, Leningradskaya str., 70), PhD, leading researcher, specialist in the field of experimental research. E-mail: dn_suslov@rrcrst.ru.
Andozhskaya Yuliya — Pavlov First St.-Petersburg State Medical University (197022, Saint Petersburg, L’va Tolstogo str. 6-8), Dr Sci, assistant of department of hospital surgery no. 2, specialist in vascular surgery. E-mail: andozhskaya@mail.ru.
Galibin Oleg — Pavlov First St.-Petersburg State Medical University (197022, Saint Petersburg, L’va Tolstogo str. 6-8), Dr Sci, professor, head of biotechnology department, specialist in the field of experimental research. E-mail: ogalibin@mail.ru.
Shilova Olga — Grebenschikov Institute of Silicate Chemistry of Russian Academy of Sciences (199034, St-Petersburg, Makarova naberezhnaya 2), Dr Sci, professor, chief researcher, acting head of the Laboratory of inorganic synthesis, specialist in the field of physical chemistry and technology of glass-ceramic nanocomposite materials. E-mail: olgashilova@bk.ru.
Reference citing:
Kalinina M.V., Kovalko N.Yu., Suslov D.N., Andozhskaia Yu.S., Galibin O.V., Shilova O.A. Vliyanie vysokoporistoj biokeramiki na osnove sistemy ZrO2 – Y2O3 – CeO2 na biologicheskie tkani eksperimental'nyh zhivotnyh [Effect of highly porous bioceramics based on ZrO2 – Y2O3– CeO2 system on the biological tissues of experimental animals]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 29 – 39. DOI: 10.30791/1028-978X-2020-7-29-39
D,L-polylactide degradation in biological media: experiment and model
I. V. Arutyunyan, P. I. Borovikov, A. G. Dunaev, L. I. Krotova, A. P. Sviridov,
E. M. Trifanova, T. H. Fatkhudinov, G. T. Sukhikh, V. K. Popov
The processes of changes in the surface morphology and internal structure, as well as the molecular mass distribution of amorphous D, L polylactides during their hydrolytic degradation in the presence of extra-germinal mesenchymal stem cells (MSCs) (ratschwart jelly umbilical cord) of the rat and their metabolic products have been studied. It was shown that the degradation of initially monolithic polymer samples in culture and conditioned media occurs almost identically. However, in a culture medium containing MSCs, this process is much more intense. This effect can be interpreted in terms of the influence of enzymes secreted by living cells, which diffuse from the surface into the polymer sample and accelerate its hydrolysis, entering into a catalytic reaction with the ether bonds of polylactide molecules. A mathematical model has been developed and verified that takes into account both non-catalytic and catalytic channels of hydrolysis, changes in the porosity of the polymer sample, diffusion of short-length oligomers, and adequately interprets the experimental results.
Keywords: biodegradation of polymers, aliphatic polyesters, polylactides, autocatalytic hydrolysis, stem cells, mathematical model of degradation.
DOI: 10.30791/1028-978X-2020-7-40-51
Arutyunyan Irina — National Medical Research Center for Obstetrics, Gynecology and Perinatology named after academician V.I. Kulakov (4 Oparin st., Moscow, Russia 117997), PhD (Biol), senior researcher, expert in cell technology and tissue engineering. E-mail: labrosta@yandex.ru.
Borovikov Pavel — National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Academician V.I.Kulakov (117997 Moscow, Oparina str., 4), head of laboratory, expert in mathematical physics, informatics. E-mail: borpi@mail.ru.
Dunaev Andrey — Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences (2 Pionerskaya st., Troitsk, Moscow, Russia, 108840), junior researcher, expert in the field of chromatography, structure and properties of polymers and supercritical fluid technologies. E-mail: dunaewan@gmail.com.
Krotova Larisa — Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences (2 Pionerskaya st., Troitsk, Moscow, Russia, 108840) researcher, expert in spectroscopy, scanning electron microscopy and supercritical fluid technology. E-mail: krollar@yandex.ru.
Sviridov Alexander —Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences (2 Pionerskaya street, Troitsk, Moscow, Russia, 108840), Dr Sci (Phys-Math), head of laboratory, leading researcher, expert in the field of biophotonics, laser medicine, optical diagnostics of biological tissues. E-mail: sviridov@laser.ru.
Trifanova Ekaterina —Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences (2 Pionerskaya street, Troitsk, Moscow, Russia, 108840), research engineer, specialist in the field of biophysics and supercritical fluid technologies. E-mail: katikin@mail.ru.
Fatkhudinov Timur — Research Institute of Human Morphology (117418 Moscow, Cjurupy st., 3), Dr Sci (Med), deputy director for scientific development, specialist in the field of experimental morphology, regenerative medicine, cell biology and tissue engineering. E-mail: fatkhudinov@gmail.com.
Sukhikh Gennady — National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Academician V.I. Kulakov (4 Oparin st., Moscow, Russia 117997), academician of Russian Academy of Medical Sciences, Dr Sci (Med), professor, Honored master of science of the Russian Federation, director, expert in cell technology in medicine. E-mail: g_sukhikh@oparina4.ru.
Popov Vladimir —Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences (2 Pionerskaya street, Troitsk, Moscow, Russia, 108840) , doctor of physics and mathematics, head of laboratory, leading researcher, specialist in physical chemistry, biomaterials, laser, additive and supercritical fluid technologies. E-mail: popov@laser.ru.
Reference citing:
Arutyunyan I.V., Borovikov P.I., Dunaev A.G., Krotova L.I., Sviridov A.P., Trifanova E.M., Fatkhudinov T.H., Sukhikh G.T., Popov V.K. Degradaciya D,L-polilaktidov v biologicheskih sredah: eksperiment i model' [D,L-polylactide degradation in biological media: experiment and model]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 40 – 51. DOI: 10.30791/1028-978X-2020-7-40-51
Preparation and investigation of properties of metal-containing nanocomposites on the basis of epoxy diane resin
N. I. Kurbanova, S. K. Ragimova, N. Ya. Ishenko, S. F. Akhmedbekova, A. Z. Chalabiyeva
The influence of additions of nanofillers (NF) containing nanoparticles of copper and zinc oxides, stabilized by polymer matrix of high pressure polyethylene, prepared by mechano-chemical method on peculiarities of structure and properties of the metal-containing nanocomposites on the basis of epoxy diane resin (ED-20) by the methods of differential-thermal (DTA) and IR-spectral (IRS) and X-ray diffraction (XRD) has been investigated. It has been shown that an introduction of the metal-containing NF in composition with ED-20 shifts the cold curing reaction temperature from 90 to 75 °C, and hot curing from 125 to 100 °C and favors increase of its thermal stability, which is confirmed by growth of activation energy of thermal-oxidative destruction (Eact) from 210 to 225 kJ/mol. It has been shown that the nanoparticles of copper oxide increase the thermal properties of ED-20 and are the catalysts of curing reaction as evidenced by peak height on curing curve. In this case, the nanoparticles of zinc oxide practically don’t influence on thermal properties of nanocomposites on the basis of ED-20.
Keywords: epoxy diane resin (ED-20); metal-containing nanofillers; nanoparticles of copper and zinc oxide; thermal properties; DTA, and IRS and XRD.
DOI: 10.30791/1028-978X-2020-7-52-58
Kurbanova Nushaba Ismail gizi — Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), Dr Sci (Chem), head of laboratory, specialist in the field of development of composition materials and also nanocomposites on the basis of elastomers and thermoplasts and their binary mixtures. E-mail: ipoma@science.az; kurbanova.nushaba@mail.ru.
Ragimova Sevinj Kazim gizi — Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), dissertant, specialist in the field of development of composition materials. E-mail: ipoma@science.az.
Ishenko Nelli Yakovlevna — Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), PhD (Chem), head of laboratory, specialist in the field of development of composition materials. E-mail: ipoma@science.az.
Akhmedbekova Saida Fuad gizi — Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), PhD (Chem), leading researcher, specialist in the field of IR – spektroskopy. E-mail: ipoma@science.az.
Chalabiyeva Almaz Zulfugar gizi — Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), PhD (Chem), leading researcher, specialist in the field of development of composition materials. E-mail: ipoma@science.az.
Reference citing:
Kurbanova N.I., Ragimova S.K., Ishenko N.Ya., Akhmedbekova S.F., Chalabiyeva A.Z. Poluchenie i issledovanie svojstv metallsoderzhashchih nanokompozitov na osnove epoksidianovoj smoly [Preparation and investigation of properties of metal-containing nanocomposites on the basis of epoxy diane resin]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 52 – 58. DOI: 10.30791/1028-978X-2020-7-52-58
Methods for increasing the hardness and wear resistance
of economically alloyed high-strength steels for the manufacture of products operating in conditions of intense abrasive wear
V. I. Antipov, L. V. Vinogradov, I. O. Bannykh, A. G. Kolmakov, Yu. E. Mukhina, E. E. Baranov
A comprehensive overview of the structural factors on which the hardness of steel depends is presented, as well as methods of increasing the hardness and wear resistance of inexpensive, economically alloyed high-carbon steels suitable for operation in abrasive wear and high contact stresses are discussed. The mechanism of increasing the hardness of the material by multiple (cyclic) cold treatment of high-carbon steels hardened on martensite is considered. It is shown that quadruple cold treatment (with cooling to –70 °С) of rolls from cheap low-alloy steel 170Х2Ф increased their hardness from 58 – 59 HRC to 67 – 68 HRC, exceeding the indicators of the best foreign analogues. The possibilities of application of quenching with fast electric heating are described. It has been found that quenching of steel products with fast electric heating with high frequency currents (HFC), industrial frequency currents (IFC), passing electric current allows to increase their hardness on 2 – 4 units of HRC compared to quenching with relatively slow furnace heating. At the same time, the more dispersed the initial structure of ferrite-cementite mixture, the smaller the cementite plates in it, the greater the value of hardness increase during quenching with rapid electric heating. The effect of ultra-low tempering on the hardness of steel has been investigated, and it has been shown that in order to achieve high hardness of the material, it is desirable to use ultra-low tempering of high-carbon martensite at 100 – 140 °С, which contributes to the creation of nanoneodenicity on carbon, and allows to further increase hardness of low-alloy high-carbon steels by 1.5 – 2.0 units of HRC.
Keywords: hardness, low-alloy high-carbon steel, cyclic cold treatment, quenching.
DOI: 10.30791/1028-978X-2020-7-59-67
Antipov Valeriy — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Russia, Moscow, Leninskii pr. 49), PhD (Eng), senior scientific employee, specialist in powder metallurgy, coatings and composite materials.
E-mail: viantipov@imet.ac.ru.
Vinogradov Leonid — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Russia, Moscow, Leninskii pr. 49), PhD (Eng), senior scientific employee, specialist in powder metallurgy, coatings and composite materials.
E-mail: ltdvin@yandex.ru
Bannykh Igor — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Russia, Moscow, Leninskii pr. 49), PhD (Eng), deputy director, specialist in metal science. E-mail: iobannykh@imet.ac.ru.
Kolmakov Alexey — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334, Russia, Moscow, Leninskii pr. 49), Dr Sci (Eng), head of laboratory, correspondent member of RAS, specialist in the field of composite and nanomaterials, multifractal analysis, synergetics. E-mail: kolmakov@imet.ac.ru.
Mukhina Yulia — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Russia, Moscow, Leninskii pr. 49), PhD (Eng), research associate, specialist in the field of structural analysis and physical chemistry of inorganic materials. E-mail: mukhina.j.e.imet@yandex.ru.
Baranov Eugenius — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Russia, Moscow, Leninskii pr. 49), research associate, specialist in the field of composite materials. E-mail: arefiy@mail.ru.
Reference citing:
Antipov V.I., Vinogradov L.V., Bannykh I.O., Kolmakov A.G., Mukhina Yu.E., Baranov E.E. Metody povysheniya tverdosti i iznosostojkosti ekonomnolegirovannyh vysokoprochnyh stalej dlya izgotovleniya izdelij, rabotayushchih v usloviyah intensivnogo abrazivnogo iznosa [Methods for increasing the hardness and wear resistance of economically alloyed high-strength steels for the manufacture of products operating in conditions of intense abrasive wear]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 59 – 67. DOI: 10.30791/1028-978X-2020-7-59-67
Rising of charge stability of gate dielectric of MIS structure
by phosphorus doping
D. V. Andreev, G. G. Bondarenko, V. V. Andreev, A. A. Stolyarov
In the paper we demonstrate that the thermal doping of SiO2 film by phosphorus, causing formation of thin film of phospho-silicate glass on its surface, allows to rise charge stability of gate dielectric of MIS structure. We have ascertained that a presence of the film of phospho-silicate glass has given a possibility to significantly lower local injection currents flowing within defects because of electron capturing by traps located in the film of phospho-silicate glass what results in the rising of energy barrier. As a result, amount of the structures that comes to a state of breakdown at low values of charge injected into the dielectric under high fields noticeably reduces. We show that heating processes of injected electrons lowers in the films of phospho-silicate glass and this results in increasing of charge stability of the gate dielectric under high-field injection.
Keywords:MIS-structure, dielectric film, high fields, injection current, test.
DOI: 10.30791/1028-978X-2020-7-68-74
Andreev Dmitrii — Kaluga branch of Bauman Moscow State Technical University (Kaluga, 248000, Bazhenov str., 2), PhD (Eng), associate professor, specialist in physics of semiconductors and dielectrics. E-mail: dmitrii_andreev@bmstu.ru.
Bondarenko Gennady — National Research University Higher School of Economics (Moscow, 123458, Tallinskaya Ulitsa, 34), Dr Sci (Phys-Math), professor, head of laboratory, specialist in condensed matter physics and radiation solid-state physics. E-mail: gbondarenko@hse.ru.
Andreev Vladimir — Kaluga branch of Bauman Moscow State Technical University (Kaluga, 248000, Bazhenov str., 2), Dr Sci (Eng), professor, specialist in physics of semiconductors and dielectrics. E-mail: vladimir_andreev@bmstu.ru.
Stolyarov Alexander — Kaluga branch of Bauman Moscow State Technical University (Kaluga, 248000, Bazhenov str., 2), Dr Sci (Eng), professor, specialist in physics of semiconductors and dielectrics. E-mail: a.a.stolyarov@bmstu.ru.
Reference citing:
Andreev D.V., Bondarenko G.G., Andreev V.V., Stolyarov A.A. Povyshenie zaryadovoj stabil'nosti plenok podzatvornogo dielektrika MDP-struktur metodom ih legirovaniya fosforom [Rising of charge stability of gate dielectric of MIS structure by phosphorus doping]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 68 – 74. DOI: 10.30791/1028-978X-2020-7-68-74
Titanium hydroxide as precursor for obtaining
functional materials
L. G. Gerasimova, Yu. V. Kuzmich, E. S. Shchukina, M. V. Maslova
It was found that finely ground powders can polymorphically transform into other nonequilibrium crystalline phases in the study of phase transformations of X-ray amorphous titanium hydroxide (TH) in the process of mechanical activation in the presence of additives in the form of zinc compounds. Judging by the increase in the intensity of the peaks in the diffraction patterns, it can be stated that amorphous phase crystallizes in the form of anatase and brookite as a result of high-energy exposure. It is shown that the lower the degree of hydration of titanium hydroxide, the efficiency of the mechanical effect of the additive on phase transformations is higher. The following trend for the effect of the introduced modifier is observed — ZnSO4·7 H2O > Zn(NO3)2·6 H2O > ZnO. This dependence is due to the combination of physical and chemical transformations of the material located in the field of intense mechanical influence, confirmed by data on the calculation of crystallite size and microstrains. The conversion of excess mechanical energy into thermal energy initiates chemical processes with the formation of solid titanium-zinc solutions, which accelerate the restructuring of the crystalline structure upon calcination of the modified titanium hydroxide according to the scheme: anatase-brookite-rutile. The obtained results have the prospects of practical application in the production of the so-called “rutile” nuclei used in the industrial production of titanium dioxide for various purposes.
Keywords: mechanical-activated processing, titanium hydroxide, anatase, rutile, modifier, thermolysis, microstrains.
DOI: 10.30791/1028-978X-2020-7-75-84
Gerasimova Lidia — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” (184209, Russia, Murmansk region, Apatity, Аcademical city, 26a), Dr. Sci. (Eng.), leading researcher, specialist in hydrometallurgy titanium raw materials and production of functional materials. E-mail: l.gerasimova@ksc.ru.
Kuzmich Yuriy — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” (184209, Russia, Murmansk region, Apatity, Аcademical city, 26a), PhD (Chem), head of laboratory, specialist in powder metallurgy. E-mail: y.kuzmich@ksc.ru.
Shchukina Ekaterina —Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” (184209, Russia, Murmansk region, Apatity, Аcademical city, 26a), PhD (Eng), resercher, specialist in obtaining titanium compounds. E-mail: e.shchukina@ksc.ru.
Maslova Marina — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” (184209, Russia, Murmansk region, Apatity, Аcademical city, 26a), leading researcher, Dr. Sci. (Eng), specialist in treatment of waste, obtaining titanium containing products using as sorbent. E-mail: m.maslova@ksc.ru.
Reference citing:
Gerasimova L.G., Kuzmich Yu.V., Shchukina E.S., Maslova M.V. Gidroksid titana kak prekursor dlya polucheniya funkcional'nyh materialov [Titanium hydroxide as precursor for obtaining functional materials]. Perspektivnye Materialy — Advanced Materials (in Russ), 2020, no. 7, pp. 75 – 84. DOI: 10.30791/1028-978X-2020-7-75-84
