Phase Complex and Chemical Interaction in the Ternary Reciprocal System Li+,Rb+||Br–,$${\text{CrO}}4^{{2 - }}$$
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Abstract
Abstract— The phase complex of a ternary reciprocal system of lithium and rubidium bromides and chromates has been studied theoretically and experimentally for the first time. We have divided the phase complex into secondary phase compatibility triangles and obtained a linear phase tree, in which the vertices of each simplex describe crystallizing phases. Using the ion balance method, we have described chemical transformations and predicted crystallizing phases for mixtures with a preset composition. Using data for the bounding systems, we have constructed a computer 3D model of the phase complex and obtained polythermal and isothermal sections and liquidus surface isotherms. Using differential thermal analysis and X-ray diffraction, we have demonstrated adequacy of the proposed division into simplexes. Phase equilibria in the system have been studied experimentally, and we have determined the composition and melting point of ternary invariant points. The composition of the ternary eutectic E3 245 is recommended for use as a fusible electrolyte for electrochemical cells. Comparison of experimental data with prediction results derived from the model demonstrates adequacy of modeling of phase equilibria with the use of a 3D model.
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Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Solid-state spectroscopy and crystallography · Transition Metal Oxide Nanomaterials
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References (37)
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