Recognition of simplexes with immiscibility in ionic salt systems on the basis of phase trees for design of electrolytes for chemical current sources

Abstract

An algorithm is developed for searching secant elements and simplexes having immiscibility in multinary systems; phase trees of systems are the only initial data set required for the implementation of this algorithm. The Li,Na,Rb||F,Br four-component reciprocal system is used for testing the algorithm. As a result of experimental studies, immiscibility regions are demarcated inside the Li,Rb||F,Br ternary reciprocal system, in LiF-NaF-RbBr and LiF-NaBr-RbBr stable secant triangles, and in the LiF-LiBr-NaBr-RbBr stable tetrahedron. The low-melting alloy corresponding to the four-component invariant point, with a melting temperature of 272°C, may be recommended for use as an electrolyte in chemical current sources.