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Title

Graphene nanoplatelets for electrically conductive 3YTZP composites densified by pressureless sintering

AuthorsLópez-Pernía, Cristina; Gallardo-López, A.; Morales-Rodríguez, A.; Poyato, Rosalía
Issue Date2019
PublisherElsevier
CitationJournal of the European Ceramic Society 39: 4435- 4439 (2019)
Abstract3 mol% yttria tetragonal zirconia polycrystalline (3YTZP) ceramic composites with 2.5, 5 and 10 vol% graphene nanoplatelets (GNP) were pressureless sintered in argon atmosphere between 1350 and 1450 °C. The effects of the GNP content and the sintering temperature on the densification, microstructure and electrical properties of the composites were investigated. An isotropic distribution of GNP surrounding ceramic regions was exhibited regardless the GNP content and sintering temperature used. Electrical conductivity values comparable to the ones of fully dense composites prepared by more complex techniques were obtained, even though full densification was not achieved. While the composite with 5 vol% GNP exhibited electrical anisotropy with a semiconductor-type behaviour, the composite with 10 vol% GNP showed an electrically isotropic metallic-type behaviour.
Publisher version (URL)http://dx.doi.org/10.1016/j.jeurceramsoc.2019.05.067
URIhttp://hdl.handle.net/10261/201998
DOIhttp://dx.doi.org/10.1016/j.jeurceramsoc.2019.05.067
Identifiersdoi: 10.1016/j.jeurceramsoc.2019.05.067
issn: 1873-619X
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