[en] The method of differential thermal analysis was applied to study the interactions among components of binary and ternary mixtures of zircon with sodium hydroxide and sodium carbonate as well as to determine the fusibility of products of interaction. Using X-ray diffraction analysis the formation of sodium metazirconate was found to result from the interaction of mixture components. Chemical analysis of leaching products showed that mixtures of sodium hydroxide and carbonate are the promising reagents for zircon break down

[en] Corrosion losses of tungsten covered by the layer of glass-enamel melt were determined at 800, 850, 900, 950 deg C. It is shown that the rate of high-temperature oxidation of tungsten decreases after application of glass-enamel melt on its surface. This is probably conditioned by reduction of area of metal interaction with oxidizing atmosphere

[en] Short communication

[en] Density, viscosity and electric conductivity of (LiCl-KCl)_eut-CuCl-CuCl₂ melts are studied depending on their composition and temperature (673-873 K) in the atmosphere of gaseous chlorine. Calculation of ion and electron contributions to electricity transfer, depending on molar-share concentration of copper chlorides is performed

[en] Two methods-gradient bath and thermal bridge methods-which make it possible to establish control over the crystal growth from solution-melt characterized by continous temperature decrease at the crystallization front are considered. In both cases heat conductivity equations are solved and simple analytical criteria for temperature axial gradient linearity for the while solidification process are found. Areas of practical application of both methods are indicated

[en] Method for determination of thermodynamic coefficients in multi-component alloys developed for solid solution model, is applied for determination of thermodynamic coefficients of nickel-germanium binary melt at the temperature of 1773 K. Concentration dependences of integral, surplus and partial Gibbs molar energies, integral and surplus entropies were found on the basis of the obtained concentration dependence of thermodynamic coefficient dependence of thermodynamic coefficients. Conclusion is made on possibility of this method application. The areas of a the method applicability are pointed out

[en] The method of isoperibolic calorimetry was applied for measurements of partial and integral enthalpy of alloy formation in three-component Ni-B-C system at 1900 ±15 K within a wide range of homogeneous solutions. It was shown that boron atoms intensely decreased Ni-C pairing interaction energy due to active interaction with nickel atoms. All this resulted in a decrease of carbon solubility

[en] By methods of thermo-and mass gravimetry is shown that oxidation kinetics of aluminium-cerium alloys depends on the phase composition and temperature. Liquid alloys oxidation is subjected to parabolic law. The oxidation rate constant is of the order 10^-3kg(m² x s). Refs. 3, figs. 5

[en] Absorption spectra of alkali metal molten halides (CsX, where X = F, Cl, Br, I) in the frequency range of 40000-30000 cm^-1 have been recorded by the method of reflection-absorption spectroscopy. Light absorption is explained by thermal molecular scattering on the high-temperature melt density fluctuations

[en] A method of studying surface fluctuations of liquid metal density in a wide range of temperatures is suggested. The method trial has been arranged for studying the behaviour of molten pure iron in ner the liquidus region. The method permitted ascertaining the presence of structural heterogeneity of the iron melt surface and its dynamics depending on temperature