Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/27502
Title: Flowability characterization of nanopowders
Authors: Xanthakis, Epameinondas 
Van Ommen, J. Ruud 
Ahrne, Lilia 
Major Field of Science: Natural Sciences
Field Category: Chemical Sciences
Keywords: Nanopowders;Flowability;Powder flow tester
Issue Date: Dec-2015
Source: Powder Technology, 2015, vol. 286, pp. 156-163
Volume: 286
Issue: 156
Start page: 163
Journal: Powder Technology 
Abstract: The applications of nanopowders are increasing significantly over the last years. In most of these applications, the flow behavior of the nanopowders seems to be a complicated, multiparametric but critical issue for the proper design of the processes. We have investigated, classified and compared several different metal oxide nanoparticles with respect to their flow properties. The flow properties of titania, silica and alumina hydrophilic nanopowders as well as their corresponding hydrophobic counterparts were determined by means of an annular shear cell powder flow tester (PFT). All the tested powders showed difficulties in flow while the titania nanopowders showed the highest difficulty among them. The results acquired regarding the compressibility, the flow functions and the effective angle of internal friction revealed that in all the cases the hydrophobic nanopowder seemed to be more cohesive than its hydrophilic counterpart. Moreover, the nanoparticles, no matter their polarity, showed negligible hygroscopicity while in the case of the alumina nanopowders the flow properties can be significantly influenced by ca. 1% (w/w) of moisture content.
URI: https://hdl.handle.net/20.500.14279/27502
ISSN: 1873328X
DOI: 10.1016/j.powtec.2015.08.015
Rights: © Elsevier
Attribution-NonCommercial-NoDerivatives 4.0 International
Type: Article
Affiliation : SP Food and Bioscience 
Delft University of Technology 
Publication Type: Peer Reviewed
Appears in Collections:Άρθρα/Articles

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