Experimental investigation and thermodynamic calculation of excess enthalpies in the Ag-Pb-Te system

Autor(en): Romermann, F
Blachnik, R
Stichwörter: Ag-Pb-Te system; calorimetry; Chemistry; Chemistry, Physical; CU; excess enthalpies; LIQUID ALLOYS; Materials Science; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; thermodynamics
Erscheinungsdatum: 1998
Herausgeber: ELSEVIER SCIENCE SA
Journal: JOURNAL OF ALLOYS AND COMPOUNDS
Volumen: 280
Ausgabe: 1-2
Startseite: 147
Seitenende: 157
Zusammenfassung: 
The excess enthalpies of liquid alloys in the ternary system Ag-Pb-Te were experimentally determined at 973, 1073 and 1173 K in a heat flow calorimeter. Five sections AgyPb1-y-Te with constant concentration ratios x(Ag)/x(Pb) were measured. The enthalpy surface in the ternary system is characterized by a valley stretching from the exothermic minimum in the system Pb-Te (-26.9 kJ mol(-1) at x(Te) =0.337) to the exothermic minimum in the system Ag-Te (-21.0 kJ mol(-1) at x(Te)=0.520) at 1173 K. The association model was applied for the analytical description of the ternary liquid. Additional ternary interaction parameters had to be used for the calculation of the excess enthalpies which were obtained by adjusting the curves to the experimental data using the least squares method. (C) 1998 Elsevier Science S.A. All rights reserved.
ISSN: 09258388
DOI: 10.1016/S0925-8388(98)00666-5

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