Manipulation of powdery materials by a sequentially pulsed coplanar barrier discharge

• Autoři: RÁHEĽ Jozef; ZEMÁNEK Miroslav; ILČÍKOVÁ Martina; ZISCHKA Radek; HAŠANA Jaromír
• Rok publikování: 2019
• Druh: Článek ve sborníku
• Konference: SAPP XXII, Book of Contributed Papers
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• Klíčová slova: plasma; DBD; ceramic powders
• Popis: Practical implementation of dielectric barrier discharge (DBD) plasma activation of fine powders requires a proper management of their transport through the active discharge zone. We present results of a new method for the powder transport, which takes benefit from the natural tendency of powders to concentrate outside the DBD’s microfilament plasma channel. We have extended the number of DBD high voltage electrodes to 3 and 4 and started to sequentially energize only a chosen electrode pair. Locally fired plasma caused powders to pile up outside the formed discharge zone. Switching to another electrode pair shifted the place where powders pile up to a neighboring area. At optimized conditions, the repetitive shift of piling area was sufficient to initiate the directional drift of treated powders.

Související projekty

• Research center of surface treatment
• Rozvoj centra pro nízkonákladové plazmové a nanotechnologické povrchové úpravy
• Fyzikální aktivace povrchu keramických částic jako nástroj pro zlepšení vlastností jemnozrnné pokročilé keramiky