Phase Equilibria in the NaCl–Na₂CrO₄–RbI Stable Triangle of the Na⁺,Rb⁺||Cl^–,I^–,\({\text{CrO}}_{4}^{{2 - }}\) Four-Component Reciprocal System

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发表日期：

2025年2月1日

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K. D. Pleshakov,
E. M. Dvoryanova,
I. K. Garkushin

摘要

Abstract

The Na⁺,Rb⁺||Cl^–,I^–, \({\text{CrO}}_{4}^{{2 - }}\) four-component reciprocal system is studied, whose low-melting compositions are promising for the development of electrolytes for chemical current sources and heat-storage materials. The system is partitioned into stable simplices using graph theory, and a phase tree of the system is constructed to include three stable tetrahedra connected to one another by two stable triangles. Phase equilibria in the NaCl–Na₂CrO₄–RbI stable triangle are studied by differential thermal analysis (DTA) and thermogravimetric analysis (TGA). As a result of these studies, the melting point and the contents of components in the three-component eutectic are determined: E 430°C, 20% NaCl, 48% Na₂CrO₄, 32% RbI (equiv.). The compositions of the phases crystallizing in the eutectic are verified by X-ray powder diffraction (XRD).

Phase Equilibria in the NaCl–Na2CrO4–RbI Stable Triangle of the Na+,Rb+||Cl–,I–,\({\text{CrO}}_{4}^{{2 - }}\) Four-Component Reciprocal System

摘要

Phase Equilibria in the NaCl–Na₂CrO₄–RbI Stable Triangle of the Na⁺,Rb⁺||Cl^–,I^–,\({\text{CrO}}_{4}^{{2 - }}\) Four-Component Reciprocal System