Thermodynamic Reassessment of the Na-Cu and Na-K Binary Systems

Abstract

Abstract:The Na-Cu and Na-K systems are of significant interest due to the use of liquid sodium and melt of sodium and potassium in the nuclear industry as a cooling agent in nuclear reactors. In the present work, thermodynamic modeling of phase equilibria in the Na-Cu and Na-K systems is carried out, based on the available published experimental data. This modeling was done using the "FactSage" software package (version 7.0). The set of Redlich-Kister equation parameters was obtained, which allows one to describe the dependence of Gibbs energy from composition and temperature for solutions that can be formed in the studied systems. Phase diagrams (T-x diagrams) of the investigated systems were calculated.

Measurement of Volume Changes and Associated Stresses in Ge Electrodes Due to Na/Na+ Redox Reactions

“…1b. Similarly, the Cu current collector is inert to Na as per Na-Cu equilibrium phase diagram [36][37][38] , and it will not contribute to the stress development during sodiation/desodiation cycling of Ge electrode. Sputterdeposited Ge thin films (under the above-mentioned conditions) are, in general, amorphous.…”