Ionic conductivity and phase transitions in solid solutions Na 3 Sc 2(1−x) Yb 2x (PO 4 ) 3

Abstract

In this article, the concentration intervals of the existence of single-phase solid solutions
Na 3 Sc 2(1−x) Yb 2x (PO 4 ) 3 (x = 0 - 0,03) are established, the regularities concerning the conductive properties and phase transitions of the synthesized samples are studied. The features of ionic conductivity in the α –, β –, γ –phases of the solid solutions under study have been clarified. The behavior of the temperatures of the phase transitions Т α→β and Т β→γ , which
occur as a result of the substitution of ytterbium cations for scandium atoms in solid solutions Na ₃ Sc _2(1−x) Yb _2x (PO ₄ ) ₃ , has been established.