The Excess Enthalpies of Liquid Ge–Pb–Te Alloys
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Abstract
The excess enthalpies of liquid alloys in the ternary system Ge-Pb-Te were determined at 1210 K in a heat flow calorimeter for five sections GeyPb1−y-Te with y = 0.2,0.4, 0.5, 0.6 and 0.8 and at 1153 K for Ge0.5Pb0.5–Te. The enthalpy surface in the ternary system is determined by a valley of exothermic minima, stretching from an exothermic minimum at the composition GeTe to one at the composition PbTe in the respective binaries. The excess enthalpies in the limiting metallic binary were adapted with the Redlich-Kister formalism. For the description of the thermodynamic functions in the ternary system the equation of Bonnier was taken using ternary coefficients. The calculated curves are in good agreement with the experimental data.
Abstract
Die Exzeßenthalpien flussiger Ge–Pb–Te-Legierungen wurden bei 1210 K in einem Wärmeflußkalorimeter gemessen. Es wurden fünf Schnitte GeyPb1-y-Te mit jeweils konstantem Konzentrationsverhältnis der binären Legierung Ge–Pb untersucht. Die resultierende Exzeßenthalpiefläche des ternären Systems wird durch eine Minimarinne bestimmt, die sich von dem exothermen Minimum im binären System Ge–Te zum exothermen Minimum im System Pb-Te erstreckt. Die analytische Beschreibung der Exzeßenthalpien der binären Randsysteme erfolgte nach Redlich-Kister, die der Werte des ternären Systems nach der Interpolationsformel von Bonnier unter Hinzunahme ternärer Koeffizienten. Die berechneten Kurven stimmen mit den experimentellen Ergebnissen gut überein.
Funding statement: The authors are grateful to the Deutsche Forschungsgemeinschaft and to the Fonds der Chemie for financial support
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© 1997 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Aufsätze
- Characterisation of γ′ Precipitates in Single Crystal Nickel-base Superalloy SC16 by Small Angle Neutron Scattering
- The Excess Enthalpies of Liquid Ge–Pb–Te Alloys
- Experimental Investigation and Thermodynamic Calculation of the Ternary System Mn–Y–Zr
- The Fe-Zn-Ti System at 450 °C
- Thermodynamic Assessment of the V–N System
- Schmelzfläche und Phasengleichgewichte mit Beteiligung der Schmelze im System Al-AlCo-AlNi
- Shear Bands In Cold Rolled Al–Mg Alloy Polycrystals
- Rolling and Recrystallization Textures in High Purity Al–Mg Alloys
- Effect of Modified Postweld Heat Treatment on Disbonding of 2.25 Cr-1 Mo Steel Overlay Welded with Austenitic Stainless Steel
- Effect of Vanadium Addition on Disbonding of 2.25Cr–1Mo Steel Overlay Welded with Austenitic Stainless Steel
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Mitteilung aus dem Materialprüfungsamt Nordrhein-Westfalen
- Buchbesprechung
- Fortbildungsseminar
Articles in the same Issue
- Frontmatter
- Aufsätze
- Characterisation of γ′ Precipitates in Single Crystal Nickel-base Superalloy SC16 by Small Angle Neutron Scattering
- The Excess Enthalpies of Liquid Ge–Pb–Te Alloys
- Experimental Investigation and Thermodynamic Calculation of the Ternary System Mn–Y–Zr
- The Fe-Zn-Ti System at 450 °C
- Thermodynamic Assessment of the V–N System
- Schmelzfläche und Phasengleichgewichte mit Beteiligung der Schmelze im System Al-AlCo-AlNi
- Shear Bands In Cold Rolled Al–Mg Alloy Polycrystals
- Rolling and Recrystallization Textures in High Purity Al–Mg Alloys
- Effect of Modified Postweld Heat Treatment on Disbonding of 2.25 Cr-1 Mo Steel Overlay Welded with Austenitic Stainless Steel
- Effect of Vanadium Addition on Disbonding of 2.25Cr–1Mo Steel Overlay Welded with Austenitic Stainless Steel
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Mitteilung aus dem Materialprüfungsamt Nordrhein-Westfalen
- Buchbesprechung
- Fortbildungsseminar
