The miscibility gap region in liquid metal-chalcogen alloys

Electrical conductivity measurements were performed for liquid immiscible ( InxTl1-x)(0.80)Se-0.20, (InxTl1-x)(0.80)Te-0.20 and In-0.80(SexTe1-x)(0.20) alloys at temperatures up to 1200 K under ambient pressures of argon gas ( up to 50 MPa). The electrical conductivity shows the same dependence as bin ary liquid alloys which have a metal-nonmetal transition during the mixing- demixing process. It was revealed that variation of Se-to-Te ratio at const ant content of metal as well as variation of Tl-to-In ratio at constant con tent of chalcogen change the properties of coexisting liquids and affect th e temperature of phase separation. The results are analyzed in comparison w ith available data for immiscible In-Se, In-Te, TI-Se, Tl-Te and Tl-Se-Te a lloys. (C) 2001 Elsevier Science B.V. All rights reserved.