Activity coefficients of lanthanum in gallium and gallium-aluminum based alloys

• Published in: Journal of alloys and compounds Vol. 790; pp. 809 - 813
• Main Authors: Schetinskiy, A.V., Dedyukhin, A.S., Kharina, E.A., Volkovich, V.A., Yamshchikov, L.F.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 25.06.2019; Elsevier BV
• Subjects: Activity coefficients; Alloys; Aluminum; Aluminum base alloys; Electric potential; Electromotive force, EMF; Electromotive forces; Force measurement; Gallium base alloys; Lanthanum; Mathematical analysis; Precipitation; Rare earth alloys and compounds; Thermodynamic properties; Precipitation; Lanthanum; Thermodynamic properties; Rare earth alloys and compounds; Electromotive force, EMF
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.03.199

Activity of β-lanthanum were determined in gallium and gallium-aluminum alloy (12 mol. % Al) at 573–1081 K and 573–999 K, respectively, using the electromotive force measurements method. Partial molar thermodynamic functions of lanthanum in the said alloys were calculated. Solubility of lanthanum in liquid gallium was measured between 368 and 1073 K and activity coefficients of β-lanthanum in liquid Ga and Ga–Al alloy calculated. Comparison of results obtained for La–Ga and La–Ga–Al alloys showed that addition of aluminum to Ga–La alloys had an insignificant influence on thermodynamic properties of lanthanum. •Addition of Al to Ga–La alloys had insignificant influence on lanthanum properties.•Activity of β-lanthanum in gallium and gallium-aluminum alloy were determined.•Solubility of lanthanum in liquid gallium was determined by precipitation method.•Activity coefficients of La in gallium and gallium-aluminum alloy were calculated.