Thermodynamic study of phase equilibrium of superionic alloys of Ag3SBr1−xClx system in the concentration range 0.0–0.4 and temperature range 370–395 K

Abstract

Thermodynamic assessment of the phase stability of the solid solutions of superionic alloys of the Ag3SBr1−xClx (I) system in the concentration range 0 ≤ x ≤ 0.4 and temperature range 370-395 K was performed. Partial functions of silver in the alloys of solid solution were used as the thermodynamic parameters. The values of partial thermodynamic functions were obtained with the use of the electromotive force method. Potential-forming processes were performed in electrochemical cells. Linear dependence of the electromotive force of cells on temperature was used to calculate the partial thermodynamic functions of silver in the alloys. The serpentine-like shape of the thermodynamic functions in the concentration range 0-4 is an evidence of the metastable state of solid solution. The equilibrium phase state of the alloys is predicted to feature the formation of * Corresponding Author. E-mail: riv018@i.ua

Novel synthesis of semiconductor chalcohalide anti-perovskites by low-temperature molecular precursor ink deposition methodologies

“…Until now, Ag 3 SX films have been produced by pulsed laser deposition (which requires high vacuum), 14 and laser ablation (from powders prepared at temperature above 600 1C). 15 Furthermore, in most studies on chalcohalide anti-perovskites, powders and pellets have been fabricated by a high temperature annealing (typically around 600 1C) of the solid-state precursors (Ag 2 S and AgX), 16,17 whereas we propose a chemically versatile and costeffective method that allows synthesis at low temperatures (220 1C). More recently, a revived interest in anti-perovskites has resulted in new works reporting the synthesis of high-purity Ag 3 SBr and Ag 3 SI powders at temperatures below 300 1C by mechanochemical synthesis.…”