Ag2S-Ga2S3-PbS QUASI-TERNARY SYSTEM
DOI:
https://doi.org/10.15421/jchemtech.v33i2.318398Keywords:
system, quasi-ternary system, triangulation, pseudoternary, compound, eutecticAbstract
Multicomponent chalcogenides of copper and silver are scientifically and practically prospective materials, widely used in microelectronics. Thus, these materials posses unique properties such as optical, electrical, ferroelectric and ion conductivity. One of the urgent problems in the solar energy is the development of easily producable, environmentally friendly materials, capable of efficiently converting solar energy into electricity and other energy types. From this point of view, the search for chalcopyrite-structured compounds, such as AgGaS2, CuInS2 and PbInS2, is of great importance. The synthesis of quaternary alloys was carried out in an evacuated quartz ampoule using pre-synthesized melts and high-purity elements at a temperature of 1100–1400 K. After melting the samples were gradually cooled down to 650–800 K at a rate of 10–15 degrees per hour, and then homogenization was carried out under the condition of 300–400 seconds.The state of equilibrium in the quasi-ternary Ag2S-Ga2S3-PbS system has been studied for the first time using modern methods of physicochemical analysis. The study has found that the four sections of the quasi-ternary system are quasi-binary, and based on them, the quasi-ternary system is triangulated into five pseudo-ternary subsystems. It has been proved that in the ternary system a four-component compound AgPb2GaS4 is formed and there are limited solubility regions based on the initial components.
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