November 13, 2015 was the 100th anniversary of Nikolay Alekseevich Zheltukhin, corresponding member of the Academy of Sciences of the USSR, Lenin Prize winner, a famous specialist in the field of thermal engineering, hydrodynamic stability, gas dynamics, and high-velocity aerodynamics.
M. A. MIKHAILENKO1, U. V. ANCHAROVA1, E. A. SHTARKLEV2, A. YU. VLASOV2, M. V. KOROBEINIKOV2, A. S. KOZLOV3, A. K. PETROV3, B. P. TOLOCHKO1,2 and N. Z. LYAKHOV1 1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: mikhailenko@solid.nsc.ru 2Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 11, Novosibirsk 630090 (Russia) 3Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Ul. Institutskaya 3, Novosibirsk 630090 (Russia)
Keywords: radiation-thermal synthesis, ferrites, mechanocomposite
Pages: 47–51
Radiation-thermal synthesis of ferrite Ni0.75Zn0.25Fe2O4. was investigated. Comparative analysis of the reactivity of mechanically activated mixtures obtained from commercial oxides and from metal nanooxides was carried out. It was shown that the formation of mechanocomposite was necessary for the efficient reaction.
O. A. PODGORNOVA and N. V. KOSOVA
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: kosova@solid.nsc.ru
Keywords: lithium-ion rechargeable cells, cathode materials LiCo1 - yFeyPO4, mechanical activation, crystal structure, cycling
Pages: 53–59
Single-phase superfine LiCo1–yFeyPO4 solid solutions were synthesized with the use of a mechanochemically stimulated carbothermal reduction of iron and cobalt oxides throughout the entire range of 0 ≤ y ≤ 1. The mechanical activation was carried out using an AGO-2 planetary mill. According to the scanning electron microscopy, the average primary particle size of the samples synthesized ranges within 200–250 nm. According to the XRD phase analysis, all the samples crystallize in the orthorhombic system, with space group Pnma. The volume of the unit cell increases with increasing the content of iron in samples. According to Mцssbauer (NGR) spectroscopy, all iron ions are in the oxidation state 2+ in an octahedral environment typical for olivine. Electrochemical properties of Li1 – yFeyPO4 were investigated by means of galvanostatic cycling. It has been demonstrated that with the increase of Fe content a marked shift in the potential of the Co2+/Co3+ pair toward lower voltage values occurs, whereas the potential of the Fe2+/Fe3+ pair remains almost unchanged.
V. R. PODUGOLNIKOV1,2 and N. V. KOSOVA1 1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: kosova@solid.nsc.ru 2Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090 (Russia)
Keywords: Na2FePO4F, mechanochemical synthesis, crystal structure, chemical and electrochemical exchange of Na for Li
Pages: 61–67
A solid-phase waste-free and energy-saving synthesis with the use of mechanical activation of single-phase cathode material Na2FePO4F (sp. gr. Pbcn) for sodium and lithium accumulator has been implemented. It has been demonstrated that the product is formed already at the stage of mechanical activation (MA) and is crystallized in the course of subsequent annealing up to 600 °С, whereas heating up to 700 °С results in decomposing the product formed to give Na3PO4, Fe3O4, Na0.11FeF3 and Na3Fe2(PO4)3. Electrochemical properties of Na2FePO4F have been studied in a cell with a lithium anode and lithium electrolyte. According to results of the studies the specific capacity of Na2FePO4F surface-modified with carbon is equal to 115 mA ⋅ h/g at a rate of cycling amounting to C/10. It has been found that the process of chemical and electrochemical replacing Li by Na in the structure of Na2FePO4F is completed by the formation of a compound with the composition NaLiFePO4F (sp. gr. Pbcn).
YA. E. TATARINOVA1,2 and V. P. ISUPOV2 1Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090 (Russia) 2Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: isupov@solid.nsc.ru
Keywords: mechanical activation, aluminium hydroxide, lithium carbonate, lithium γ–monoaluminate
Pages: 69–73
Lithium γ–monoaluminate was obtained as a result of mechanochemical activation of the mixture of lithium carbonate and aluminium hydroxide in AGO-2 planetary activator, followed by the thermal treatment. The effect of mixture composition and humidity on the phase composition and specific surface of lithium γ–monoaluminate was studied. It was shown that in the variation of the composition and humidity of the mixture the specific surface area of the final product decreases significantly (from 13 to 0.2 m2/g).
F. KH. URAKAEV, YU. M. BORZDOV, E. I. PETRUSHIN, V. S. SHEVCHENKO and N. P. POKHILENKO
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Koptyuga 3, Novosibirsk 630090 (Russia) E-mail: urakaev@igm.nsc.ru
Keywords: diamond, mechanical activation, mechanochemical reactors, milling bodies, abrasive reaction wear, effect of graphite
Pages: 75–79
The anomalous effect of graphite on the degree of wear of copper milling bodies was studied quantitatively. It was shown that mechanical activation of the system diamond–graphite–silicon with copper milling bodies led to the formation of copper-containing semi-products and stable coatings on the surface of milling bodies.
V. V. ZUEV, N. E. ZUEVA, P. K. KUTSENOGIY and E. S. SAVELYEVA
Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch of the Russian Academy of Sciences, Pr. Akademicheskiy 10/3, Tomsk 634055 (Russia) E-mail: vvzuev@imces.ru
Keywords: volcanic eruption, eruptive column, stratosphere, temperature, solar radiation, ozone depression, sulphuric acid aerosol, carbon particles
Pages: 81–86
The temperature anomalies and long-term depressions of ozone in the stratosphere observed after large-scale volcanic eruptions are poorly explained from the point of view of modern ideas about composition of the stratospheric aerosol of the volcanogenic nature. However, such post-volcanic phenomena could occur in case when the aerosol comp its surface. The basic opportunity of forming nanosized carbon aerosol (less than 0.1 μm in size) in the stratosphere in case of powerful Plinian type volcanic eruptions is shown in the paper. Estimates of the amount and lifetime of these particles allow explaining long-term temperature anomalies and the ozone depression in the stratosphere after volcanogenic perturbations.
L. A. IGNATIEV
Institute of Soil Science and Agricultural Chemistry, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 8/2, Novosibirsk (Russia) E-mail: arsey@issa.nsc.ru
Keywords: high molecular mass oil components, disposal methods, toxicity, plant production process, agrochemical properties of soil, translocation effect
Pages: 87–91
An effect of various concentrations of high molecular mass components of oil as wastes of petroleum production on the soil state and plant production processes was studied. From the standpoint of toxicity, its permissible concentrations values thereof for the normal vital function of plants were determined. A positive effect of oil on some agrochemical soil properties has been revealed, which opens up prospects for developing a biological method of utilization of oil wastes disposal.
E. I. KAPINUS, S. V. KAMYSHAN and E. V. MANUYLOV
Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, Ul. Generala Naumova 13, Kyiv 03164 (Ukraine) E-mail: eugenekapinus@yahoo.com
Keywords: sodium sulphide, zinc oxide, adsorption kinetics, photocatalytic oxidation kinetics
Pages: 93–98
Adsorption and photocatalytic oxidation kinetics for sulphide ions on zinc oxide in aqueous solutions has been studied. It has been found that the rate constants of sodium sulphide adsorption and photocatalytic oxidation on zinc oxide decrease with increasing the substrate concentration, which indicates an auto-inhibition of these processes due to blocking the surface of zinc oxide by sodium sulphide.
N. I. KOPYLOV1, YU. D. KAMINSKY1, ZH. DUGARZHAV2 and B. AVID2 1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: kolyubov@narod.ru 2Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ul. Mira, 4, Ulaanbaatar 210351 (Mongolia) E-mail: dugar21mn@yahoo.com
Keywords: Tavantolgoy deposit, black coal, thermolysis, gas components, low-melting, volatile fractions, baking, porosity, briquetting
Pages: 99–104
Integrated investigation of the thermolysis of black coal from the Tavantolgoy deposit (Mongolia) was carried out. It was discovered that coal decomposes during thermolysis within temperature range 300–500 °С with the evolution of gas, low-melting and low-boiling phases, intensively increases in volume and gets agglomerated. As a result, rather strong porous cake is formed. Its volume is 1.5–2 times larger than the volume of the initial sample. It was shown that coal from the Tavantolgoy deposit (without any binding additives) can be used for briquetting.
