Preparation and electrical properties of dense micro-cermets made of nickel ferrite and metallic copper

Dense micro-cermets made of nickel ferrites and copper micrometric particles were obtained from partial reduction under hydrogenated atmosphere at 350 C of mixed copper nickel ferrites, and sintering in nitrogen at 980 C. The small copper particles are homogeneous in size and well dispersed in the s...

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Bibliographic Details
Published in:Solid state sciences 2009-08, Vol.11 (8), p.1503-1506
Main Authors: Baco-Carles, Valérie, Pasquet, Isabelle, Laurent, Véronique, Gabriel, Armand, Tailhades, Philippe
Format: Article
Language:English
Subjects:
Engineering Sciences
Materials
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Summary:Dense micro-cermets made of nickel ferrites and copper micrometric particles were obtained from partial reduction under hydrogenated atmosphere at 350 C of mixed copper nickel ferrites, and sintering in nitrogen at 980 C. The small copper particles are homogeneous in size and well dispersed in the spinel oxide matrix. No exudation of copper metal was observed after sintering. The micro-cermets prepared are semi-conducting materials with electrical conductivity lying from 44 to 130 S/cm at 980 C. Their overall characteristics make them interesting for inert anodes dedicated to aluminium electrolysis in melted cryolite.
ISSN:1293-2558
DOI:10.1016/j.solidstatesciences.2009.05.016