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Your search keyword '"Meijer, Jan A. M."' showing total 13 results
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13 results on '"Meijer, Jan A. M."'

9. Creeping: an efficient way to determine the anticaking ability of additives for sodium chloride.

Author

Townsend, Eleanor R., Swennenhuis, Floris, van Enckevort, Willem J. P., Meijer, Jan A. M., and Vlieg, Elias

Subjects
SALT, CREEP (Materials), CRYSTAL growth
Abstract

This article investigates the relationship between additive induced creeping and anticaking activity in sodium chloride. Through a series of creeping experiments and powder flow analysis, we establish a clear correlation between the amount of creeping and the anticaking effect of an additive. Habit modification is found not to be a sufficient condition for an anticaking agent. The correlation is explained by the fact that both creeping and anticaking require blocking of crystal growth. [ABSTRACT FROM AUTHOR]

Published
2017
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12. The structure of PbCl2 on the {100} surface of NaCl and its consequences for crystal growth.

Author

Townsend, Eleanor R., Brugman, Sander J. T., Blijlevens, Melian A. R., Smets, Mireille M. H., de Poel, Wester, van Enckevort, Willem J. P., Meijer, Jan A. M., and Vlieg, Elias

Subjects
LEAD chlorides, CRYSTAL growth, SALT, ATOMIC structure, CRYSTAL structure, FERROCYANIDES, X-ray diffraction
Abstract

The role that additives play in the growth of sodium chloride is a topic which has been widely researched but not always fully understood at an atomic level. Lead chloride (PbCl2) is one such additive which has been reported to have growth inhibition effects on NaCl {100} and {111}; however, no definitive evidence has been reported which details the mechanism of this interaction. In this investigation, we used the technique of surface x-ray diffraction to determine the interaction between PbCl2 and NaCl {100} and the structure at the surface. We find that Pb2+ replaces a surface Na+ ion, while a Cl− ion is located on top of the Pb2+. This leads to a charge mismatch in the bulk crystal, which, as energetically unfavourable, leads to a growth blocking effect. While this is a similar mechanism as in the anticaking agent ferrocyanide, the effect of PbCl2 is much weaker, most likely due to the fact that the Pb2+ ion can more easily desorb. Moreover, PbCl2 has an even stronger effect on NaCl {111}. [ABSTRACT FROM AUTHOR]

Published
2018
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