ТЕРМОДИНАМИЧЕСКИЙ РАСЧЕТ И 3D-МОДЕЛИРОВАНИЕ T-x-y И P(Se2)-T-x ДИАГРАММ В СИСТЕМЕ Сu–Pb–Se ПО ЛИКВИДУСУ PbSe
| Autor: | N. B. Babanly, E. I. Mamedov, A. N. Mamedov, N. Ya. Ahmedova |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Ternary numeral system
Materials science Diagram Analytical chemistry chemistry.chemical_element Binary compound Liquidus Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law Materials Chemistry Solid phases Physical and Theoretical Chemistry Crystallization Ternary operation Selenium |
| Zdroj: | Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases. 20:84-92 |
| ISSN: | 2687-0711 |
| DOI: | 10.17308/kcmf.2018.20/480 |
| Popis: | From the condition that the chemical potentials of the components of the AB compoundare equal in the equilibrium liquid and solid phases, taking as pure liquid components as the standardstate, equations are obtained for calculating and modeling of partial excess thermodynamic functions,of the pressure-temperature-composition diagram and liquidus surfaces of the binary compound inthe ternary system A–B–C. The equations obtained are tested on the Cu–Pb–Se system in the liquidusregion of the PbSe compound. It is shown that the vapor phase mainly consists of two atomic moleculesof selenium Se2. For the liquidus regions PbSe(p-type)-Se and PbSe(n-type)-Pb, the followingdependences are obtained, respectively:lg Se p 2 (Pa) = [–1281 + 5624(1000/T) – 9190(1000/T)2 + 6648(1000/T)3 – 1797(1000/T)4] – 10.35 xCu2 ;lg Se p 2 (Pa) = [2026 – 8778(1000/T) + 14247(1000/T)2 – 10259(1000/T)3 + 2759(1000/T)4] – 8.36 xCu2 .For the thermodynamics calculation and modeling of surface crystallization PbSein the ternary systemCu -Pb-Se is obtained dependence:T = [ + ( - x ) Gexs (xl )] / [ . - . ln x ( - Cu.PbSe Se Se 110693 1 0 35D 25 695 8 31 1 xSe )]Where DGexs lPbSe, = –76057 + 335550,738хSe – 2,41759E6хSe2 + 7,33249E6хSe3 – 9,7868E6 хSe4 + 4,69725E6хSe5.3D visualization of the obtained analytical dependencies is carried out with the help of a computerprogram OriginLab2017. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|