Abstract
The use of graphene as a component for developing electroconductive ceramic composites is being profusely studied. It is a very promising additive as it has excellent mechanical properties, high electrical and thermal conductivities, it is lightweight and its aspect ratio allows reaching percolation with low contents.
In the particular case of zirconia, preparation of black coloured materials remains a challenge while many high added value applications are waiting for a solution. Graphene appears as a candidate for fulfilling all these requirements. In this work, 3Y–TZP/rGO composites were prepared by Spark Plasma Sintering Zirconia-rGO mixtures. Simultaneous sintering and in-situ reduction of graphene oxide opens a very interesting technological route for preparing this type of materials. The influence of graphene content on the electrical, mechanical and optical properties was studied. An rGO content as low as 0,29 vol% allows nanostructured black zirconia to be obtained but it has to be increased up to 1 vol% in order to reach electrical resistivity values <100Ωcm, required for electrodischarge machining.
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Authors would like to thank The Ministry of Education of the Russian Federation supported this work by contract №14.577.21.0089, unique identifier of contract RFMEFI57714X0089.
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Solís, N.W., Peretyagin, P., Torrecillas, R. et al. Electrically conductor black zirconia ceramic by SPS using graphene oxide. J Electroceram 38, 119–124 (2017). https://doi.org/10.1007/s10832-017-0076-z
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DOI: https://doi.org/10.1007/s10832-017-0076-z