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Título: | Electrical performance of orthotropic and isotropic 3YTZP composites with graphene fillers |
Autor: | López-Pernía, Cristina; Muñoz, Ferreiro, Carmen; Moriche, R. CSIC ORCID; Morales-Rodríguez, Ana; Gallardo-López, Ángela; Poyato, Rosalía CSIC ORCID | Palabras clave: | Zirconia Aspect ratio Electrical conductivity Graphene-based nanostructures (GBN) Percolation threshold |
Fecha de publicación: | abr-2023 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 43(4): 1605-1612 (2023) | Resumen: | 3 mol% yttria tetragonal zirconia polycrystal (3YTZP) composites with orthotropic or isotropic microstructures were obtained incorporating few layer graphene (FLG) or exfoliated graphene nanoplatelets (e-GNP) as fillers. Electrical conductivity was studied in a wide range of contents in two configurations: perpendicular (σꓕ) and parallel (σ//) to the pressing axis during spark plasma sintering (SPS). Isotropic e-GNP composites presented excellent electrical conductivity for high e-GNP contents (σꓕ ∼ 3200 S/m and σ// ∼ 1900 S/m for 20 vol% e-GNP), consequence of their misoriented distribution throughout the matrix. Optimum electrical performance was achieved in the highly anisotropic FLG composites, with high electrical conductivity for low contents (σꓕ ∼ 680 S/m for 5 vol%), percolation threshold below 2.5 vol% FLG and outstanding electrical conductivity for high contents (σꓕ ∼ 4000 S/m for 20 vol%), result of the high aspect ratio and low thickness of FLG. | Versión del editor: | https://doi.org/10.1016/j.jeurceramsoc.2022.11.068 | URI: | http://hdl.handle.net/10261/347692 | DOI: | 10.1016/j.jeurceramsoc.2022.11.068 | ISSN: | 0955-2219 |
Aparece en las colecciones: | (ICMS) Artículos |
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3YTZP-composites.pdf | 2,71 MB | Adobe PDF | Visualizar/Abrir |
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