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1.
Инвентарный номер: нет.
   
   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
ББК 54
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.

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2.
Инвентарный номер: нет.
   
   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
ББК 54
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

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3.
Инвентарный номер: нет.
   
   E 43


   
    Electrochemical nucleation and growth of silicon in the KF-KCl-K2SiF6 melt / Y. P. Zaykov, S. I. Zhuk , A. I. Isakov, O. V. Grishenkova, V. A. Isaev // Journal of Solid State Electrochemistry. - 2015. - Vol. 19, № 5. - С. 1341-1345. - Библиогр.: с. 1345 (36 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КРЕМНИЙ -- ЭЛЕКТРООСАЖДЕНИЕ -- ЗАРОДЫШЕОБРАЗОВАНИЕ -- РОСТ -- ЦИКЛОТЕТРАФОСФАТ МАРГАНЦА -- ХРОНОАМПЕРОМЕТРИЯ -- КОЭФФИЦИЕНТ ДИФФУЗИИ
Аннотация: The work related to the study of the initial stages of the silicon electrodeposition on the glassy carbon electrode in molten KF-KCl-K2SiF6 was performed. The silicon nucleation and growth process was investigated using cyclic voltammetry, chronoamperometry, and scanning electron microscopy. It was shown that the electrocrystallization process occurs by the instantaneous nucleation with diffusion-controlled growth under the studied conditions. The Scharifker-Hills theoretical model was used to calculate the nucleation density and the diffusion coefficient of depositing ions.

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4.
Инвентарный номер: нет.
   
   I-69


   
    Interaction of heat resistance concrete with low melting electrolyte KF-AlF3 (CR = 1.3) [Текст] / Yu. P. Zaikov, A. Chuikin, A. A. Red'kin, A. P. Khramov, N. I. Shurov, O. V. Chemezov, V. A. Kryukovskii // Light Metals: proc . - 2007. - С. 369-372.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ELECTROLYTE -- RESISTANCE

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5.
Инвентарный номер: нет.
   
   L 79


   
    Liquidus Temperatures of Cryolite Melts With Low Cryolite Ratio [] / A. Apisarov , A. Dedyukhin , E. Nikolaeva , P. Tinghaev , O. Tkacheva, A. Redkin, Y. Zaikov // Metallurgical and Materials Transactions B. - 2011. - Vol. 42B, № 1. - С. 236-242. - Bibliogr. : p. 241-242 (24 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КРИОЛИТ -- ТЕМПЕРАТУРЫ ЛИКВИДУСА -- НИЗКОЕ КРИОЛИТОВОЕ ОТНОШЕНИЕ
Аннотация: The effect of calcium fluoride on liquidus temperatures of the cryolite melts with a low cryolite ratio (CR) was studied. The systems KF-NaF-AlF3 and KF-LiF-AlF3 with CRs of 1.3, 1.5, and 1.7 have been investigated. The liquidus curves of systems containing CaF2 are different and depend on the K/(K + Na) and K/(K + Li) ratios. In potassium cryolite with CRs of 1.3 and 1.5, the calcium fluoride solubility is low and increases with NaF (LiF) concentration. ??

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Metallurgical and Materials Transactions B\\MMT2011,V.42 N 1. - P.236-242.pdf
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6.
Инвентарный номер: нет.
   
   S 60


   
    Silica Solubility in Molten Fluoride–Chloride Electrolytes and Density of KF–KCl–K2SiF6–SiO2 Melts / Y. P. Zaikov, A. A. Redkin , A. A. Apisarov, I. V. Korzun , N. P. Kulik, A. V. Isakov, A. A. Kataev , O. V. Chemezov // Journal of Chemical & Engineering Data . - 2013. - Vol. 58, № 4. - С. 932-937. - Bibliogr. : p. 937 (17 ref.) . - ISSN 0021-9568
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
РАСТВОРИМОСТЬ -- ПЛОТНОСТЬ -- KF–KCl–K2SiF6–SiO2
Аннотация: The solubility of silica in fluoride–chloride electrolytes for use in the electrolysis of solar-grade silicon was studied. The visual method was used for the investigation. Liquidus temperatures were investigated by thermal analysis. The silica solubility rises with KF content and temperature. The densities of the compositions with high silica solubility were determined.

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7.
Инвентарный номер: нет.
   
   S 90


   
    Studies on the oxidation rate of metallic inert anodes by measuring the oxygen evolved in low-temperature aluminium electrolysis / V. A. Kovrov, A. P. Khramov, Yu. P. Zaikov, V. N. Nekrasov , M. V. Ananyev // Journal of Applied Electrochemistry . - 2011. - Vol. 41, № 11. - С. 1301-1309. - Библиогр.: с. 1309 (16 ref.) . - ISSN 0021-891Х
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
Al -- ЭЛЕКТРОД -- ИНЕРТНЫЙ АНОД -- ПАССИВАЦИЯ -- СКОРОСТЬ ОКИСЛЕНИЯ
Аннотация: The rate of oxygen evolution on metallic inert anodes was measured as a function of current density during electrolysis of a low-melting NaF(12)–KF–AlF3 bath ([NaF + KF]/[AlF3] = 1.5 mol mol-1) at 800 °C. The oxidation rate of the anode substrate (A cm- 2) was calculated. The anode oxidation process was depressed at the potentials of oxygen evolution. The dynamics of the decrease in the oxidation rate, which were obtained in previous study by the change in geometrical size of the metallic part of the specimen, was reproduced both by the technique proposed and also in potentiostatic electrolysis at potentials below that of oxygen evolution, in some cases, depending on prepolarisation.

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8.
Инвентарный номер: нет.
   
   T 44


   
    The Behavior of KBF4 in Potassium-Cryolite-Based Melts / А. Kataev, O. Tkacheva, A. Redkin, A. Rudenko, A. Dedyukhin , Yu. Zaikov // Journal of the Electrochemical Society. - 2015. - Vol. 162, № 4. - PH283-H285
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТЕМПЕРАТУРА ЛИКВИДУСА -- КРИОЛИТ -- ПРОВОДИМОСТЬ
Аннотация: The KBF4 impact on the physical-chemical properties of the KF-AlF3 and KF-NaF(10 wt%)-AlF3 melts with cryolite ratio (CR) 1.3–1.5 was studied at temperatures 700–800°C. The KBF4 additions (up to 15 mol%) to the potassium-cryolite-based electrolytes increase the liquidus temperature, however, the KBF4 presence in the cryolite-alumina melt improves the Al2O3 solubility and enlarges the range of homogeneity in the (cryolite-KBF4)-Al2O3 system. The KBF4 additions (within a concentration range of 0–10 mol%) do not noticeably impact the electrical conductivity of the KF-AlF3-KBF4 melt (CR = 1.3). The mass loss of the KF-AlF3-KBF4 samples with low CR determined by thermogravimetry analysis over two hours is not higher than 3% at temperature 800°C.

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9.
Инвентарный номер: нет.
   
   T 44


   
    Theoretical and experimental study of anode process at the carbon in KF–AlF3–Al2O3 melts / V. N. Nekrasov, A. B. Suzdaltsev, O. V. Limanovskaya, A. P. Khramov, Yu. P. Zaikov // Electrochimica Acta. - 2012. - Vol. 75. - С. 296-304. : граф. - Библиогр.: с. 303-304 (31 ref.) . - ISSN 0013-4686
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРОЛИЗ АЛЮМИНИЯ -- ТЕМПЕРАТУРА -- АНОД -- ПОЛЯРИЗАЦИЯ
Аннотация: The influence of the [KF]/[AlF3] ratio (1.1–1.5 mol mol−1), the Al2O3 concentration (1–5 wt.%) and the temperature (973–1073 K) on the overpotential of the anode process for a glassy carbon electrode in a KF–AlF3–Al2O3 melt under stationary and non-stationary conditions was studied by galvanostatic polarisation and chronopotentiometry. A theoretical (mathematical) description of the two-step electrode process at the carbon anode in KF–AlF3–Al2O3 melts under stationary and non-stationary conditions is suggested. The charge of the electric double-layer, the formation of an intermediate COads adsorption product at the anode surface, the limitations of the current transfer, which include the charge transfer through the electrode/electrolyte interface, and the diffusion and chemical interaction of the electroactive ions in the melt near the anode surface were taken onto account. Alterations of the basic parameters of the process were monitored and analysed. Estimates of anode process kinetics parameters (e.g., exchange current densities and the degree of the anode surface coverage by the intermediate product COads) for different experimental conditions were made by a comparison of the modelled and experimental polarisation curves. The electrochemical desorption of the intermediate product COads from the anode surface (the second step) was shown to be relatively slower than the charge transfer process (the first step). In addition, slow chemical reactions at current densities of 0.1–1 A cm−2 can occur prior to the electrode process.

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10.
Инвентарный номер: нет.
   
   А 11


   
    А14. Электропроводность расплава KCL-KF-K2SiF6 // XV Российской конф. по физической химии и электрохимии расплавленных и твердых электролитов (с международным участием). "Физическая химия и электрохимия расплавленных электролитов": тез. докл. - Нальчик, 2010. - С. 137-138.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРОПРОВОДНОСТЬ -- KCL-KF-K2SiF6

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