Phase diagram of the Sn–P system
| Autor: | Tatiana P. Sushkova, Galina V. Semenova, Alexander Yu. Zavrazhnov, Elena Yu. Proskurina |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Absorption spectroscopy Vapor pressure Annealing (metallurgy) Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry Differential thermal analysis Phase (matter) Physical and Theoretical Chemistry 0210 nano-technology Tin Phase diagram Eutectic system |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 134:475-481 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | The T–x diagram of the Sn–P system was studied by differential thermal analysis, X-ray phase analysis and local X-ray spectral microanalysis. An optical tensimetric method was used to evaluate the saturated vapor pressure of phosphorus. The method consists of in situ scanning of electronic absorption spectra of steam at different temperatures in order to obtain quantitative information about the vapor phase. In the concentration range 43–70 mol% P of the system investigated, a single eutectic equilibrium with participation of higher tin phosphides was found: L ↔ Sn4P3 + SnP3. The Sn3P4 intermediate phase is formed only during prolonged annealing of the samples at a temperature of less than 623 K. A P–T–x diagram of the Sn–P system was constructed by a combination of differential thermal analysis and optical tensimetric methods. The coordinates of the four-phase equilibrium points were found: for the synthetics equilibrium Sn4P3 ↔ V + L1 + L2, the vapor pressure is 0.6 atm at 838 ± 2 K; for the eutectic equilibrium L ↔ V + Sn4P3 + SnP3 2.8 atm. |
| Databáze: | OpenAIRE |
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