Recrystallization phenomena of solution grown paraffin dendrites

Hollander, F.F.A. and Stasse, O. and Suchtelen van, J. and Enckevort van, W.J.P. (2001) Recrystallization phenomena of solution grown paraffin dendrites. Journal of Crystal Growth, 233 (4). pp. 868-880. ISSN 0022-0248

PDF
Restricted to UT campus only: Request a copy
621Kb

Abstract:	Paraffin crystals were grown from decane solutions using a micro-Bridgman set up for in-situ observation of the morphology at the growth front. It is shown that for large imposed velocities, dendrites are obtained. After dendritic growth, aging or recrystallization processes set in rather quickly, changing the crystal shapes considerably from the well-known dendritic shapes of melt grown dendrites. It is shown that several factors may cause these post-growth shape transitions: surface minimization, uptake and subsequent sweating of solvent material, and polymorphic phase conversion. It is shown that the first two recrystallization mechanisms are the most important for tricosane (n-C23H48) and pentacosane (n-C25H52) dendrites. Surface minimization by increasing the thickness of the crystals is particularly favorable. For dotriacontane (n-C32H66) dendrites, the recrystallization behavior appears to be less dramatic. It is shown that the uptake and sweating out of solvent material afterwards may lead to formation of holes within the dendrites.
Item Type:	Article
Copyright:	© 2001 Elsevier
Research Group:	Transducers Science and Technology (TST)
Link to this item:	http://purl.utwente.nl/publications/74414
Official URL:	http://dx.doi.org/10.1016/S0022-0248(01)01602-5
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 201134