期刊
JOURNAL OF CHEMICAL THERMODYNAMICS
卷 106, 期 -, 页码 228-231出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2016.12.004
关键词
Ag-Sn-Se-Br system; Phase equilibria; Thermodynamic properties; EMF method; Standard Gibbs energy of formation
Triangulation of the Ag-Sn-Se-Br system in the part of Ag2Se-SnSe-SnSe2-AgBr was carried out using the X-ray diffraction and differential thermal analysis methods. The spatial position of the established four-phase regions regarding figurative point of silver was used in order to write the equations of virtual potential-forming chemical reactions. Potential-forming processes were performed in electrochemical cells (ECCs) of the type (-) C vertical bar Ag vertical bar Ag3GeS3Br glass vertical bar D vertical bar C (+) where C are the inert (graphite) electrodes; Ag and D are the electrodes of the ECCs; D represents the equilibrium four-phase alloys, and Ag3GeS3Br glass is a membrane with purely ionic Ag+ conductivity. The linear dependencies of the EMF of cells on temperature in the range of 480-520 K have been used in order to calculate the standard thermodynamic values of saturated solid solutions of Ag7SnSe5Br and Ag8SnSe6 compounds in the four element part of the Ag-Sn-Se-Br system. (C) 2016 Elsevier Ltd.
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