The phase diagram and the electrical resistivity of liquid Na-Ga alloys

✍ Scribed by T. Itami; M. Shimoji; J. Meijer; G.J.B. Vinke; C. Van Der Marel; W. Van Der Lugt

• Publisher: Elsevier Science
• Year: 1986
• Weight: 418 KB
• Volume: 142
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(86)90206-8

✦ Synopsis

The phase diagram and the electrical resistivity of liquid Na-Ga alloys were studied experimentally. Compound formation in the solid state was observed at 20 at. % and at 37 at. % Na. The latter composition closely corresponds to the stoichiometric compound Na22Ga39, reported recently by Ling and Belin. The present DSC and electrical resistivity measurements do not show the existence of a region of immiscibility around 70 at. % Na. The electrical resistivity p shows a maximum value of 203.9/d2 cm in the isothermal curve at 560 ° for an alloy containing 57 at.% Na. In the neighbourhood of this composition, the temperature derivative dp/d T becomes slightly negative. The values of p and dp/d T remain within the metallic regime; yet, a description by the diffraction model is complicated by a lack of information on both liquid structure and ion-electron potentials.