TY - JOUR
T1 - Experimental thermodynamic study of intermetallic phases in the binary Ag-Te system by an improved EMF method
AU - Tesfaye, Fiseha
AU - Taskinen, Pekka
AU - Aspiala, Markus
AU - Feng, Dawei
N1 - This is my article published when I was working for Aalto University
PY - 2013/3
Y1 - 2013/3
N2 - A thermodynamic study of the solid two-phase regions of the binary Ag-Te system was made by an improved EMF method, using fast ion conductor RbAg4I5 as the solid electrolyte. The EMF measurements were made on three galvanic cells: [Ag RbAg4I5 Ag5Te3 + Te], [Ag RbAg4I5 Ag5Te3 + Ag1.9Te] and [Ag RbAg4I5 Ag1.9Te + Ag2Te]. Based on the results obtained, the EMF for each equilibrium phase assembly was expressed as a function of temperature, in the different regions of thermal stability of the substances. By using the observed EMF and temperature relations, the thermodynamic functions of the stoichiometric equilibrium phase assemblages: Ag5Te3-Te, Ag5Te3-Ag1.9Te, Ag5Te3-Ag2Te and Ag2Te-Ag1.9Te, in the lowerature range 22-204°C, as well as phase transformation temperatures, have been determined. Agreement between the results obtained and the literature values were established.
AB - A thermodynamic study of the solid two-phase regions of the binary Ag-Te system was made by an improved EMF method, using fast ion conductor RbAg4I5 as the solid electrolyte. The EMF measurements were made on three galvanic cells: [Ag RbAg4I5 Ag5Te3 + Te], [Ag RbAg4I5 Ag5Te3 + Ag1.9Te] and [Ag RbAg4I5 Ag1.9Te + Ag2Te]. Based on the results obtained, the EMF for each equilibrium phase assembly was expressed as a function of temperature, in the different regions of thermal stability of the substances. By using the observed EMF and temperature relations, the thermodynamic functions of the stoichiometric equilibrium phase assemblages: Ag5Te3-Te, Ag5Te3-Ag1.9Te, Ag5Te3-Ag2Te and Ag2Te-Ag1.9Te, in the lowerature range 22-204°C, as well as phase transformation temperatures, have been determined. Agreement between the results obtained and the literature values were established.
KW - A. Multiphase intermetallics
KW - B. Phase transformation
KW - B. Thermal stability
KW - B. Thermodynamic and thermochemical properties
KW - F. Electrochemical characterization
UR - http://www.scopus.com/inward/record.url?scp=84870298107&partnerID=8YFLogxK
U2 - 10.1016/j.intermet.2012.10.009
DO - 10.1016/j.intermet.2012.10.009
M3 - Article
AN - SCOPUS:84870298107
SN - 0966-9795
VL - 34
SP - 56
EP - 62
JO - Intermetallics
JF - Intermetallics
ER -