TitleThermodynamics and Phase Diagram of the Ag-Cu-O System
Ludwig J.Gauckler (Nonmetallic Materials, Swiss Federal Institute of
Publication/Publisher"Advances in Supercoductivity VII", Proc. 7th.
Int. Symp. on Superconductivity (ISS94), Springer-Verlag Tokyo, Vol.1, (1995)
AbstractThe phase diagram of the Ag-CuOx system was experimentally
constructed. An eutectic reaction CuO + Ag = L1 (99at%Ag) at 1215K and a
monotectic reaction CuO + L1 (98at%Ag) = L2 (34.5at%Ag) at 1242K were detected
in air. TG experiments showed the weight loss at the monotectic temperature due
to oxygen evolution. The oxygen content of L2 in air at 1242K was an atomic
ratio (O/Cu) = 0.802 by the compositional dependency of oxygen loss. Under the
oxygen partial pressure PO2 of 0.01atm, the mixture of Cu2O and Ag absorbed some
amount of oxygen by the monotectic reaction at 1320K. Based on the isobaric
sections in Ag-CuO-Cu2O system at the various oxygen partial pressures, the
liquidus was estimated.