Journal
CRYSTAL RESEARCH AND TECHNOLOGY
Volume 46, Issue 4, Pages 373-382Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/crat.201000509
Keywords
metastable zone width; interfacial free energy; nucleation; growth from solution
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Funding
- Syrian Ministry of Higher Education [3913/WB]
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This study presents an evaluation of a new method, called zero growth activation free energy, used to determine the metastable zone width for the secondary nucleation case. It predicts the metastable zone width with a maximum error of 5-10%. Estimation of the metastable zone width for different isothermal crystallization conditions can be modeled according to a chosen reference set of growth experiments carried out in the volume diffusion regime at different initial supersaturations, using seed crystals of a certain characteristic size. Moreover, the activation free energy of the secondary nucleation was estimated. The role of the enthalpy of immersion in the formation of secondary nucleation events inside the metastable zone was pointed out, as well as its effect in causing extra-fast growth rate. Furthermore, sucrose crystal surface free energy was estimated. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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