Počet záznamů: 1
Homogeneous nucleation kinetics of polymorphic phases in solution
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SYSNO ASEP 0483457 Druh ASEP A - Abstrakt Zařazení RIV O - Ostatní Název Homogeneous nucleation kinetics of polymorphic phases in solution Tvůrce(i) Kožíšek, Zdeněk (FZU-D) RID, ORCID, SAI
Tahri, Y. (FR)
Gagniere, E. (FR)
Bounahmidi, T. (MA)
Mangin, D. (FR)Celkový počet autorů 5 Zdroj.dok. Book of abstracts of the 3rd World Congress on Materials Science, Engineering, Oil, Gas and Petrochemistry. - Barcelona : Scientific Future Group, 2017
S. 59-59Poč.str. 1 s. Akce 3rd World Congress on Materials Science, Engineering, Oil, Gas and Petrochemistry Datum konání 24.08.2017 - 26.08.2017 Místo konání Barcelona Země ES - Španělsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. ES - Španělsko Klíč. slova nucleation kinetics ; polymorphic phases Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) CEP LD15004 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora FZU-D - RVO:68378271 Anotace In our model, which includes nucleation, growth, and Ostwald ripening, the number density of nuclei of polymorphic phases is determined by numerical solution of kinetic equations. As a model system the L-glutamic acid (LGlu), which exhibits two monotropic polymorphs: a LGlu and b LGlu, was considered. Decrease of supersaturation during phase transition, due to formation of polymorphic phases, was taken into account. The critical sizes of nuclei of both phases increase with time as supersaturation decreases. Consequently, supercritical nuclei become undercritical and have tendency to diminish. The number of subcrictical clusters decreases, i.e. nucleation rate reaches negative values.
Such a behavior is in coincidence with Ostwald rule of stages, when large particles growt at the expense of small particles. Numerical results reflects well known experimental data at temperatures T=5, 20 and 40 oC.Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2018
Počet záznamů: 1