Institute of Physics Ministry of Science and Education Republic of Azerbaijan

INVESTIGATION OF PHYSICO-CHEMICAL, X-RAY AND ELECTROPHYSICAL PROPERTIES OF THE OBTAINED PHASES IN THE Ga₂Sr-SrSe SYSTEM

I.I. Aliyev¹, N.I. Yagubov², A.N. Sultanova², A.A. Hasanov³, A.T. Mammadova⁴

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ABSTRACT

Using methods of physicochemical analysis (DTA, XRF, MSA, as well as density and microhardness measurements), the chemical interaction in the Ga₂Sr-SrSe system was studied and its T-x phase diagram was constructed. It has been established that the Ga₂Sr-SrSe system is a quasi-binary section of the Sr-Ga-Se ternary system and belongs to the eutectic type. In the Ga₂Sr-SrSe system, there are limited regions of solid solutions based on the initial components at room temperature. Microstructural analysis showed that at room temperature, solid solutions based on the Ga2Sr compound reach 5 mol % SrSe, and based on SrSe-3.5 mol % Ga₂Sr. The composition of the eutectic formed between the Ga₂Sr and SrSe compounds is 25 mol % SrSe, at a temperature of 850°C. The lattice parameters were calculated as a result of X-ray diffraction analysis of solid solutions (SrSe)_1-x(Ga₂Sr)_x (x=0.01; 0.02; 0.03), respectively: for the SrSe compound, a=6.243 Å (SrSe) and for alloys solid solutions, a=6.263 Å (1 % Ga₂Sr), a=6.275 Å (2 % Ga₂Sr), a=6.298 Å (3 % Ga₂Sr). The temperature dependence of electrical conductivity and thermo-EMF of solid solution alloys (SrSe)_1-x(Ga₂Sr)_x (x=0.01; 0.02; 0.03) on composition was studied.

Keywords: system, phase, quasi-binary, eutectic, microhardness
DOI:10.70784/azip.1.2025137

Received: 17.03.2025
Internet publishing: 03.04.2025 AJP Fizika E 2025 01 en p.37-43

AUTHORS & AFFILIATIONS

1. Institute of Catalysis and Inorganic Chemistry named after M. Nagiyev, Ministry of Science and Education of the Republic of Azerbaijan
2. Baku State University, Baku, st. Z. Khalilov, 23.
3. Azerbaijan State University of Oil and Industry
4. Ganja State University

Graphics and Images

Fig.1-2 Fig.3-4-5

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