Thermodynamic properties of Ag-Pt alloy measured using a solid electrochemical method

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-01-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
191-197
Series
Archives of Metallurgy and Materials, Volume 63, issue 1
Abstract
AlthoughAg-Pt system is crucial for several technological applications, investigations of the thermodynamic properties of this system are limited. In the present study, activity of silver at various temperatures in the platinum rich solid solution was measured by a solid electrochemical method and employing AgI as the solid electrolyte. The EMF was determined using a galvanic cell (–)|Ag|AgI|Ag – Pt alloy|C|Pt(+), which provided novel experimental data on thermodynamic properties of aAg-Pt alloy.Activity, partial molar of Gibbs energy, enthalpy and entropy of silver in a solid solution containing 1 at % Ag between 573 and 673 K have been calculated. The results indicated that the activity of silver obtained in the present study shows a large positive deviation from the ideal Raoultian behavior. Microstructures of alloys with different compositions were also compared.
Description
Keywords
EMF method, Platinum, Silver, Silver conducting electrolyte, Thermodynamics
Other note
Citation
Santoso , I & Taskinen , P 2018 , ' Thermodynamic properties of Ag-Pt alloy measured using a solid electrochemical method ' , Archives of Metallurgy and Materials , vol. 63 , no. 1 , pp. 191-197 . https://doi.org/10.24425/118927