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In Situ Treatment of Thermal RF Plasma Processed Nanopowders to Control their Agglomeration and Dispersability

Leparoux, M. ; Leconte, Y. ; Wirth, A. ; Buehler, Th

In: Plasma Chemistry and Plasma Processing, 2010, vol. 30, no. 6, p. 779-793

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    Titre
    • In Situ Treatment of Thermal RF Plasma Processed Nanopowders to Control their Agglomeration and Dispersability
    Auteur
    • Leparoux, M.. Advanced Materials Processing, Empa, Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602, Thun, Switzerland
    • Leconte, Y.. CEA, IRAMIS, SPAM, LFP, 91191, Gif/Yvette, France
    • Wirth, A.. School for Life Sciences, University of Applied Sciences, Gruendenstrasse 40, 4132, Muttenz, Switzerland
    • Buehler, Th. School for Life Sciences, University of Applied Sciences, Gruendenstrasse 40, 4132, Muttenz, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Plasma Chemistry and Plasma Processing, 2010, vol. 30, no. 6, p. 779-793. Springer US; http://www.springer-ny.com
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:322331
    Summary
    Titanium carbonitride nanoparticles have been produced in an inductively coupled thermal plasma and subsequently modified using a surfactant that has been deposited in situ on their surface in-flight. The surfactant was injected in the reactor while the nanoparticles are still dispersed in the gas phase, allowing the coating of primary particles instead of the corresponding agglomerates. In contrast to naked TiCN nanoparticles, the surfactant coated particles could be readily dispersed in water with a short ultrasonic treatment and built up no large agglomerates as proved by Photon Correlation Spectroscopy measurements. The investigated surfactants seem, however, to undergo a chemical modification and/or a thermal degradation at the surface of the TiCN nanoparticles