O. G. Kuznetsova, A. M. Levin, A. O. Bol’shikh, O. M. Levchuk, M. A. Kaplan
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Electrical Conductivity of Rhenium-Containing Ammonium Carbonate Solutions and the Calculation of Its Activation Energy
The conductometric method is used to study the dependences of the electrical conductivity (EC) of aqueous solutions of ammonium carbonate and solutions of the ammonium carbonate–ammonium perrhenate system on the reagent content in the concentration range 0.1–1.8 mol/L for (NH4)2CO3 and 0.01–0.1 mol/L for NH4ReO4 and on the solution temperature in the range 20–50°C. EC is found to increase linearly with the electrolyte temperature and nonlinearly with the reagent concentration. The temperature coefficients of EC and its activation energies are calculated in the concentration and temperature ranges under study. The EC activation energy is found to decrease as the solution temperature increases. The calculated EC activation energies indicate a diffusion character of charge transfer.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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