GLAS FORMATION IN THE QUASI-TERNARY SYSTEMS AІ 2S–ВIVS2–СV 2S3 (АI – CU, AG; ВIV – GE, SN, СV – AS, SB)

Abstract

The boundaries of the glass formation areas of quasiternary systems AІ 2S–ВIVS2–СV 2S3 (АI – Cu, Ag; ВIV – Ge, Sn, СV – As, Sb) have been established by based on the results of X-ray phase analysis. Maximum synthesis temperature was 1100 K, followed by quenching of the ampoules in 25% a solution of sodium chloride with crushed ice. The obtained glasses have been dark gray, yellow-red color monolithic alloys. There are continuous bands of glass formation on the sides GeS2–СV 2S3 in the studied germanium-containing systems АI 2S–GеS2–СV 2S3. The main factor is the tendency of GeS2, As2S3 and Sb2S3 to the glass formation. The content of 0 – 55 мол.% Ag2S have been obtained in the vitreous state from the cross section Ag2S–GeS2. In the quasi-binary system Ag2S – As2S3 there is a region of glass formation in the 0–70 mol.% Ag2S. The maximum content of the modifier Cu2S that could be introduced while preserving the glassy state is 10 and 15 mol.% in the systems Cu2S–GеS2–As(Sb)2S3. The maximum content of the Ag2S that is part of the glass in the systems Cu2S–GеS2–As(Sb)2S3 state is 10 and 15 mol.%. The areas of glass formation have been much smaller compared to similar germanium-containing in the statecontaining systems of the glassformation area, which is associated with the strengthening of the ionic component of the chemical bond by changing GeS2 to SnS2. We observe only two areas of glass formation in quasi-triple systems Сu(Ag)2S–SnS2–Sb2S3 which are on the side SnS2–Sb2S3: one in the area 17–23 mol.% Sb2S3, the maximum content of Cu2S and Ag2S is 3 and 2 mol.%; the other – 66–83 mol.% Sb2S3, the maximum content of Cu2S and Ag2S is 12 and 4 mol.%. In the system Cu2S–SnS2–As2S3 the region of glass formation state is 76–100 mol.% As2S3, the maximum content of Cu2S is 12 mol.%. In the Ag2S – SnS2 – As2S3 system, on the cross section of Ag2S–As2S3, the region of glass formation state is 0–75 mol.% Ag2S. On the cross section of SnS2–As2S3 the region of glass formation state is 78–100 mol.% As2S3.