Original title: Powder Rheology of Nanocrystalic Particles.
Authors: Kulaviak, Lukáš ; Pěnkavová, Věra ; Růžička, Marek ; Punčochář, Miroslav ; Zámostný, P. ; Grof, Z. ; Štěpánek, F. ; Schöngut, M. ; Havlica, Jaromír
Document type: Papers
Conference/Event: Konference pigmenty a pojva /10./, hotel Jezerka, přehrada Seč (CZ), 20171206
Year: 2017
Language: eng
Abstract: Pigments are mostly nanometric powder of anisometric particles providing complex rheological behaviour. The interparticle forces of grains (> 100 μm) are based on direct contact, which is mainly influenced by the particle size and shape. On the other hand powder (< 4 μm) and especialy nanometric powder (< 100 nm) is influenced mainly by electrostatic charges and by moisture (respectively by the liquid and solid bridges forming). However the morphology affects the surface area and thus the distribution of surface charge and\nthe moisture content on/in single particle. Last but not least, it is also good to know the history of the powder, i.e. the effect of aging and the memory of the powder on the strength of the material. The nanometric powder TiO2 was chosen as a demonstration material and measuring device was FT4 powder rheometer.
Keywords: electrostatic charging; moisture; powder history
Host item entry: Sborník, ISBN 978-80-906269-2-8
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.

Institution: Institute of Chemical Process Fundamentals AS ČR (web)
External URL: http://www.pigmentyapojiva.cz/assets/kpp2017-sbornik.pdf
Original record: http://hdl.handle.net/11104/0279962

Permalink: http://www.nusl.cz/ntk/nusl-371455


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