Phase formation in the Cu2SnS3-Sb2S3 system
Antimony sulfides are of interest because of their application in microwave, switching, and optics devices. The Cu2SnS3 compound, which belongs to the class of triple diamond-like semiconductors, is a promising material for use in optoacoustics, nonlinear optical devices, and photoelectric elements. Our study is devoted to the study of chemical interaction in the Cu2S-SnS2-Sb2S3 system and the construction of a phase diagram. Differential thermal (DTA), X-ray phase (XRD), and microstructural analysis (MSA), as well as measuring microhardness and density, were used to study phase equilibria in a quasi-three-dimensional Cu2S-SnS2-Sb2S3 system over a Cu2SnS3-Sb2S3 cross section. This established that the Cu2SnS3-Sb2S3 system was a quasibinary section of the quasiternal system Cu2S-SnS2-Sb2S3 and was of the eutectic type. The eutectic coordinates corresponded to 30 mol. % Cu2SnS3 and a temperature of 750 K. Based on the starting components in the section, the regions of solid solutions were determined. At room temperature (300 K), regions of solid solutions based on Cu2SnS3 (4 mol% Sb2S3) and based on Sb2S3 (12 mol% Cu2SnS3) were identified. For the first time, a state diagram of the Cu2SnS3-Sb2S3 section was constructed in a wide range of concentrations, and it was shown that it was a quasibinary section of the quasiternal system Cu2S-SnS2-Sb2S3. It was shown that the Cu2SnS3-Sb2S3 section was of the eutectic type, and the coordinates of the eutectic point corresponded to 30 mol.% Cu2SnS3 and 750 K. The regions of solid solutions based on Cu2SnS3-Sb2S3 were determined. Solid solutions based on Cu2SnS3 at room temperature formed 4 mol. % Sb2S3, and based on Sb2S3 formed 12 mol% Cu2SnS3. Solid solutions based on Sb2S3 crystallized in rhombic syngony, and solid solutions based on Cu2SnS3 crystallized in monoclinic syngony.
Keywords
eutectic,
Cu2SnS3,
quasibinary,
Sb2S3,
ternary system,
solid solution,
Cu2SnS3-Sb2S3Authors
| Mammadov Sharafat Gadzhiaga | Institute of Catalysis and Inorganic Chemistry M. Nagiyev National Academy of Sciences | azxim@mail.ru |
Всего: 1
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