On the induction period for crystallization in solute−solvent systems by polythermal method
Artykuł w czasopiśmie
MNiSW
20
Lista A
| Status: | |
| Autorzy: | Sangwal Keshra, Mielniczek-Brzóska Ewa, Borc Jarosław |
| Rok wydania: | 2013 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 11 |
| Wolumen/Tom: | 48 |
| Strony: | 956 - 968 |
| Impact Factor: | 1,164 |
| Web of Science® Times Cited: | 5 |
| Scopus® Cytowania: | 6 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The data of induction period tin derived from the data of maximum undercooling ΔTmax at different cooling rates R for some solute−solvent systems at different saturation temperature T0 are discussed using classical and atomistic theories of three-dimensional nucleation. In the case of potassium nitrate aqueous solutions the tin data are analyzed in terms of the maximum supersaturation ratio Smax calculated from temperature dependence of solubility and the maximum undercooling ΔTmax and the values of solid−solution interfacial energy γ and number i* of molecules in the stable critically-sized nuclei predited from tin(lnSmax) and tin(ΔTmax) data are compared. These results revealed that: (1) the values of supersaturation calculated as lnS from solubility data are lower than the real values expected from the chemical potential difference Δμ and that the description of Δμ in terms of undercooling ΔTmax is realistic, and (2) analysis of induction period data for solute−solvent systems should be carried out using applied undercooling ΔT or maximum undercooling ΔTmax instead of the usually used lnS or lnSmax. Examination of tin(ΔTmax) data for different systems showed that: (1) the value of γ lies between 1.7 and 13.2 mJ/m2 while that of i* between 2 and 50, and (2) in several cases atomistic nucleation theory describes the tin(ΔTmax) data adequately. |
