Flowability characterization of nanopowders
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Flowability characterization of nanopowders. / Xanthakis, Epameinondas; Ruud van Ommen, J.; Ahrné, Lilia.
I: Powder Technology, Bind 286, 2015, s. 156-163.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Flowability characterization of nanopowders
AU - Xanthakis, Epameinondas
AU - Ruud van Ommen, J.
AU - Ahrné, Lilia
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - Flowability
KW - Nanopowders
KW - Powder flow tester
U2 - 10.1016/j.powtec.2015.08.015
DO - 10.1016/j.powtec.2015.08.015
M3 - Journal article
AN - SCOPUS:84939832411
VL - 286
SP - 156
EP - 163
JO - Powder Technology
JF - Powder Technology
SN - 0032-5910
ER -
ID: 202130964