Graphene nanoplatelets for electrically conductive 3YTZP composites densified by pressureless sintering |
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| Affiliation: | 1. Dpto. de Física de la Materia Condensada, ICMS, CSIC-Universidad de Sevilla, Apdo. 1065, 41080 Sevilla, Spain;2. Inst. Ciencia de Materiales de Sevilla, ICMS, CSIC-Universidad de Sevilla, Américo Vespucio 49, 41092 Sevilla, Spain;1. Materials Genome Institute, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China;2. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China;3. KU Leuven, Department of Materials Engineering, Arenberg Kasteelpark 44, B-3001, Heverlee, Belgium;1. School of Light Industry, Harbin University of Commerce, Harbin, 150028, PR China;2. Laboratory for Space Environment and Physical Science, Research Center of Basic Space Science, Harbin Institute of Technology, Harbin, 150001, PR China;3. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, PR China;1. Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, PR China;2. Key Laboratory of Materials Processing Engineering, College of Materials Science and Engineering, Xi’an Shiyou University, Xi’an 710065, PR China;3. Institute of Materials Science, Technische Universität Darmstadt, FB Nichtmetallisch-Anorganische Werkstoffe, Alarich-Weiss-Straße 2, D-64287 Darmstadt, Germany;4. Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, PR China;5. Department of applied physics, Xi’an University of Sciences and technology, Xi’an 710054, PR China;1. Dpt. Glass Processing, FunGlass, Alexander Dub?ek University of Tren?ín, Tren?ín, Slovakia;2. Department of Industrial Engineering, Università degli Studi di Padova, Padova, Italy;3. Ceramics Department, National Research Centre, Cairo, Egypt;4. Joint Glass Centre of the IIC SAS, TnUAD, and FChFT STU, FunGlass, Alexander Dub?ek University of Tren?ín, Tren?ín, Slovakia |
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| Abstract: | 3 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. |
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| Keywords: | Graphene nanoplatelet Zirconia Pressureless sintering Electrical properties |
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