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The solid-solution regions in the Me Sm 2 S 4 -Me S and Me Sm 2 S 4 -Sm 2 S 3 ( Me = Ca, Ba) systems are revealed. The average ion, cation, and anion transport numbers of the synthesized solid electrolytes x Sm 2 S 3 [Ca(Ba)S] · (100 -x )Ca(Ba)Sm 2 S 4 ( x = 1-10 mol %) are determined by the electromotive force (emf) method with the use of concentration cells with and without transfer. In the phases under investigation, the ion transfer in the temperature range 673-723 K is provided by sulfide ions ( = 1.00 ± 0.02). The diffusion coefficients of S 2-ions in the solid electrolytes are determined by potentiostatic chronoamperometry. A vacancy mechanism of defect formation is proposed. It is demonstrated that the transport characteristics of the solid electrolytes based on the CaSm 2 S 4 compound are worse than those of the solid electrolytes based on the BaSm 2 S 4 compound.

The theoretical feasibility of sulfide ion transport in phases based on MeLn 2 S 4 (Me = Ca, Ba; Ln = Sm, Pr) is considered. Regions of solid solutions on the basis of ternary compounds are determined. A systematic investigation of phases is performed with the application of a variety of electrochemical methods, specifically, the conductimetry, emf in chemical concentration cells with and without transport, and Tubandt methods.

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The possibility of using sulfide-conducting solid electrolytes of the Me S-Ln 2 S 3 ( Me = Ca, Ba; Ln = Y, Nd, Pr, Sm, Tm) systems in sensors for analysis of sulfur-containing media is investigated. The appropriate design parameters and operating conditions of the sensors are chosen. The influence of multicomponent impurities on the sensor selectivity is analyzed.

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Independent results for vapor nucleation rates illustrate the nucleation rates inconsistencies for identical vapor-gas systems at the same conditions. Nature of these inconsistencies is not yet understood enough. Assumption is discussed that a reason for the experimental data inconsistencies is appeared in the result of the carrier gas effects on nucleation. It was supposed for a long time that any carrier gas is an ambient atmosphere to keep the nucleation temperature only. The recent experimental results have shown that a vapor-gas nucleation needs to be treated in approximation of binary solutions, i. e. a composition axis is appeared in addition to axes of nucleation rate versus pressure. Each single line of a nucleation rate isotherm is transformed to surface in a three dimensional space of nucleation parameters. Flow diffusion chamber and expansion Wilson type set up data comparison are discussed on the example of the published empirical data. It was shown using a model system that these two experimental realizations produce the inconsistent trajectories in the space of nucleation parameters. That misfit induces the different origin data inconsistencies and demonstrates relevance of gas treatment as an individual component of a nucleating vapor-gas system.