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Iron-silica and nickel-silica nanocomposites prepared by high energy ball milling

Corrias, A., Ennas, G., Musinu, A., Paschina, G., Zedda, D. (1997) Iron-silica and nickel-silica nanocomposites prepared by high energy ball milling. Journal of Materials Research, 12 (10). pp. 2767-2772. ISSN 0884-2914. (doi:10.1557/JMR.1997.0368) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1557/JMR.1997.0368

Abstract

Metal-silica nanocomposites with different metal volume fractions have been prepared via solid state exchange reactions induced by ball milling followed by a reduction treatment in H2 flux. In nickel-containing mixtures oxygen transfers directly from NiO to Si while NiO is reduced to Ni. When NiO is present in a large ratio, its excess can be reduced by a thermal treatment in H2 flux. Nickel crystallites are obtained with nanometer size in the milling process and there is no significant growth during thermal treatment. Similar process conditions applied to Fe-containing mixtures give rise to a more complex reaction path which prevents the complete conversion of Fe(III) to Fe. Nickel-silica and iron-silica nanocomposites are also produced by ball milling mixtures of either nickel or iron with amorphous silica.

Item Type: Article
DOI/Identification number: 10.1557/JMR.1997.0368
Uncontrolled keywords: Ball milling, Binary mixtures, Cermets, Heat treatment, Hydrogen, Iron, Nickel, Reaction kinetics, Silica, Volume fraction, Solid state exchange reactions, Nanostructured materials
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 17 Dec 2014 12:33 UTC
Last Modified: 29 May 2019 13:57 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46233 (The current URI for this page, for reference purposes)
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