PHASE EQUILIBRA IN THE Ag2Se–Ag8GeSe6–Ag8SiSe6 SYSTEM AND CHARACTERIZATION Of the Ag8Si1-xGexSe6 SOLID SOLUTIONS ФАЗОВЫЕ РАВНОВЕСИЯ В СИСТЕМЕ Ag2Se–Ag8GeSe6–Ag8SiSe6 И ХАРАКТЕРИСТИКА ТВЕРДЫХ РАСТВОРОВ Ag8Si1-xGexSe6

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Ashirov G., Babanly K., Mashadiyeva L., Yusibov Y., Babanlı M.

Chemical Problems, vol.21, no.3, pp.229-241, 2023 (Scopus)

• Nəşrin Növü: Article / Article
• Cild: 21 Say: 3
• Nəşr tarixi: 2023
• Doi nömrəsi: 10.32737/2221-8688-2023-3-229-241
• jurnalın adı: Chemical Problems
• Jurnalın baxıldığı indekslər: Scopus, Academic Search Premier
• Səhifə sayı: pp.229-241
• Açar sözlər: Argyrodite family compounds, crystal lattice parameters, liquid surface, phase equilibria, silver-germanium selenide, silver-silicon selenide, solid solutions, T-x diagram
• Açıq Arxiv Kolleksiyası: Məqalə
• Adres: Bəli

Qısa məlumat

Phase equilibria in the Ag2Se–Ag8SiSe6–Ag8GeSe6 system were studied by differential thermal analysis and X-ray diffraction thechnique. Based on the experimental results and literature data, the projection of the liquidus surface of the Ag2Se–Ag8SiSe6–Ag8GeSe6 system, the isothermal section at 300 K and some polythermal sections of the phase diagram were constructed. It was determined that continuous series of solid solution are formed based on high-temperature cubic modification and limited solid solution areas are formed based on low-temperature modification of initial compounds on the Ag8SiSe6–Ag8GeSe6 side of concentration triangle. The formation of solid solutions leads to a sharp decreasing of polymorphic transition temperatures of ternary compounds and stabilization of high-temperature phases at room temperature. The liquidus surface of the Ag2Se–Ag8SiSe6–Ag8GeSe6 system consists of 2 areas reflecting the initial crystallization of α'-phase based on HT-Ag2Se and HT-Ag8Si1-xGexSe6 solid solutions. The obtained new phases are of interest as environmentally safe materials with thermoelectric properties and mixed ion-electron conductivity.