N 36 Nekrasov, V. N. Thermodynamic models of oxide dissolution processed in halogenide melts [Text] / V. N. Nekrasov, N. M. Barbin, L. E. Ivanovsky // International Symposium on Calorimetry and Chemical Thermodynamics (Moscow, June 23-28, 1991). - 1991. - P201-202. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): МОДЕЛИРОВАНИЕ ТЕРМОДИНАМИЧЕСКОЕ -- МОДЕЛЬ ТЕРМОДИНАМИЧЕСКАЯ -- РАСТВОРЕНИЕ -- ОКСИД -- РАСПЛАВ ГАЛОГЕНИДНЫЙ -- ГАЛОГЕНИД |
B 84 Brainin, M. I. Stability of flat boundaries of a liquid inclusion moving in a growing crystal [Text] / M. I. Brainin, D. A. Baraboshkin // Melts. - 1990. - V. 4, N 1. - P49-54. - Bibliogr.: 7 ref. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КРИСТАЛЛЫ РАСТУЩИЕ -- УСТОЙЧИВОСТЬ ПЛОСКИХ ГРАНИЦ -- ГРАНИЦА ПЛОСКАЯ Аннотация: В рамках теории малых возмущений исследуется устойчивость первоначально плоских границ включения расплава, перемещающегося в кристалле в однородном поле градиента температуры. Условия устойчивости границ анализируются с учетом их взаимодействия в отсутствие кинетических затруднений процессов кристаллизации и растворения Within the framework of the theory of small perturbations, the stability of initially flat boundaries of a liquid inclusion moving in a crystal in a uniform temperature field is investigated. The conditions of stability of the boundaries are analyzed by taking into account their interaction in the absence of any kinetic difficulties with crystallization and dissolution processes |
Y 96 Yushina, L. D. Investigation into the process of anode dissolution of copper in Cu+-conducting solid electrolytes [Text] / L. D. Yushina, I. V. Kochergina // Chemical Sensors: Proc. Int. Meet. (Fukuoka, Sept. 19-22, 1983). - 1983. - P312-315 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ХИМИЯ -- РАСТВОРЕНИЕ АНОДНОЕ -- АНОДНОЕ РАСТВОРЕНИЕ -- МЕДЬ -- Cu -- ЭЛЕКТРОЛИТЫ ТВЕРДЫЕ -- ТВЕРДЫЕ ЭЛЕКТРОЛИТЫ -- ЭЛЕКТРОЛИТЫ МЕДЬПРОВОДЯЩИЕ -- МЕДЬПРОВОДЯЩИЕ ЭЛЕКТРОЛИТЫ |
R 32 Red'kin, A. A. Modified alumina-cryolite bath with high electrical conductivity and dissolution rate of alumina [Текст] / A. A. Red'kin, O. Yu. Tkatcheva, Yu. P. Zaikov, A. P. Apisarov // Light Metals: proc . - 2007. - С. 513-517. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): DISSOLUTION -- ALUMINA-CRYOLITE |
Q 23 Quantum-Chemical Study of Ion Association in Electrolyte Systems Containing LiAsF6 [Текст] / S. E. Popov, A. E. Nikiforov, O. V. Bushkova, V. M. Zhukovsky // Journal of Physical Chemistry A. - 2004. - Vol. 108, № 46. - С. 10280-10287. - Библиогр. : с. 10287 (20 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): LiAsF6 -- ELECTROLYTE Аннотация: The possibility that ion clusters of different species are formed during dissolution of LiAsF6 in a low- or high-molecular-weight solvent has been studied. The Hessian matrix of clusters has been calculated by the numerical and analytical differentiation of their full energy in the MO LCAO approximation using the Roothaan?Hartree?Fock method and the PC GAMESS software package. It was found that stable ion clusters are represented by ion pairs Li+[AsF6]- with the bi- or tridentate coordination of the cation relative to the octahedral anion, triple ions [AsF6]-Li+[AsF6]- and Li+[AsF6]-Li+ with the bi- or tridentate coordination, ion dimers {Li+[AsF6]-}2 with the bidentate coordination, and also ion trimers {Li+[AsF6]-}3 and ion tetramers {Li+[AsF6]-}4 shaped as symmetric ring structures with the unidentate coordination. The frequencies and intensities of IR absorption bands of different species of ion clusters in the gaseous phase and nonaqueous solutions (acetone, ethanol, nitromethane, and tetrahydrofurane) have been calculated. This presents a basis for identification of ion particles during IR spectroscopic measurements in electrolyte solutions containing LiAsF6. |
S 53 Shardakov, N. T. A Geometrical Model of Glass-Enamel Coating. Part I. Calculation of the Open Surfase Fraction of Enameled Metal [Text] / N. T.; Institute of High-Temperature Electrochemistry (Ural Department of the RAS) Shardakov, V. Ya.; Institute of High-Temperature Electrochemistry (Ural Department of the RAS) Kudyakov // Protection of metals (Russia). - 2004. - V.40 , N 6. - P634-640. - Bibliogr.: p. 640 (13 ref). . - ISSN 0044-1856 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): GEOMETRICAL MODEL -- GLASS-ENAMEL COATING -- ENAMELED METAL -- CALCULATION -- SURFACE -- GAS BUBBLES -- MACROSTRUCTURE Аннотация: A geometrical model of glass-enamel coating (GEC) is proposed. Gas bubbles are chosen as the basic elements of its macrostructure, and the fundamental principles of the model are formulated. A model equation correlating the fraction of the open metal surface with the dissolution depth of enamel and GEC parameters is derived. Partial equations are derived according to various laws of the bubble size distribution such as invariance of the size, equal probability of any size, and normal, or lognormal distribution of bubbles over the size. It is shown that the open surface fraction always increases with the concentration of bubbles and contact angle, whereas its dependence on the GEC thickness and the statistical characteristics of the totality of bubbles has a more complex character |
A 60 Anodic behavior of the NiO-Fe2O3-Cr2O3-Cu composite during the low-temperature electrolysis of aluminum / V. A. Kovrov, A. P. Khramov, Yu. P. Zaikov, V. M. Chumarev, E. N. Selivanov // Russian Journal of Non-Ferrous Metals. - 2014. - Vol. 55, № 1. - P8-14 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИД ХРОМА -- АНОД -- ЭЛЕКТРОЛИЗ -- РАСТВОРЕНИЕ Аннотация: In order to fabricate oxide-metallic composites with the composition 25.3NiO-41.2Fe2O3-13.5Cr2O3-20.0Cu (wt %), the temperature and duration of sintering (1350°C, 30 min) that ensure the formation of the solid solution of chromium oxide in nickel ferrite have been determined. This material is tested as an anode for the electrolysis of the low-temperature solution with the composition 12.0NaF-36.8KF-51.2AlF3 (wt %), which was saturated with Al2O3 (t = 800°C). The amount of gaseous oxygen evolved on the anode was measured. It is shown that the main reaction on an anode at current density i = 0.015–1.0 A cm−2 is the oxidation of oxygen-containing anions from a melt with the formation of gaseous O2 and a substantial increase in the oxidation rate of the composite anode is observed at i > 1.0 A cm−2. The voltage across the electrolyzer (4.5 ± 0.5 V) and the anodic potential (2.43 ± 0.2 relative to the Al reference electrode) during a prolonged experiment (for 89 h, i = 0.4 A cm−2) indicate a stable and acceptable electrical conductivity of the material, while the dissolution rate, which was calculated by the weight loss (0.6 kg/yr) and volume loss (0.7 cm/yr), satisfy the requirements to inert anodes. |
A 60 Anodic behaviour of the Cu82Al8Ni5Fe5 alloy in low-temperature aluminium electrolysis / А. P. Khramov, V. A. Kovrov, Y. P. Zaikov, V. M. Chumarev // Corrosion Science. - 2013. - Vol. 70. - P194-201 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): АНОД -- ЭЛЕКТРОЛИЗ -- РАСТВОРЕНИЕ -- ЭЛЕКТРОЛИТ Аннотация: A Cu82Al8Ni5Fe5 wt.% alloy was evaluated as an inert anode in the electrolysis of an Al2O3-saturated, KF35.6–NaF12–LiF3–(AlF3)49.4 melt (790 °С) for 73 h. It was shown that metal consumption at the alloy/scale interface led to the formation of a ring-like gap that was filled with oxygen-free electrolyte. It was hypothesised that the electrochemical transfer of the alloy components through the gap occurred and the chemical oxidation of the alloy particles after the dissolution-deposition process took place in the scale. It was concluded that the rate of scale formation was governed by the percentage of current that had passed through the gap |
Z 19 Zakiryanova, I. D. In situ investigation of the mechanism of bao dissolution in chloride melts by raman spectroscopy / I. D. Zakiryanova, E. V. Nikolaeva, A. L. Bove // Journal of Applied Spectroscopy . - 2015. - Vol. 81, № 6. - P919-923. - Bibliogr. : p. 922-923 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СПЕКТРОСКОПИЯ -- РАССЕЯНИЕ КОМБИНАЦИОННОЕ -- ОКСИД БАРИЯ Аннотация: The mechanism of BaO dissolution in a melt of the BaCl2–KCl–NaCl eutectic mixture was determined in situ using Raman spectroscopy. The types, structures, and compositions of oxychloride groups present in the melt were established. It was found that BaO dissolution proceeded according to the reaction BaO (s) + [BaCl6] 4– (soln.) →[Ba2OCl6]4– (soln.) and was accompanied by the appearance of [Ba2OCl6] 4– groups (D3d symmetry) of a mixed oxychloride composition |