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Microstructure and impedance spectroscopy of 3YTZP/SWNT ceramic nanocomposites

Opened Access Microstructure and impedance spectroscopy of 3YTZP/SWNT ceramic nanocomposites

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Autor: Poyato Galán, Rosalía
Macías Delgado, Julio
Gallardo López, Angela María
Muñoz Bernabé, Antonio
Domínguez Rodríguez, Arturo
Departamento: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Fecha: 2015
Publicado en: Ceramics International, 41 (1), 12861-12868.
Tipo de documento: Artículo
Resumen: This work provides new insights on microstructure and electrical properties of 3 mol% Y2O3–ZrO2 (3YTZP) composites with 0.5, 1, and 1.5 vol% single walled carbon nanotubes (SWNTs). The composites were spark plasma sintered (SPS) in identical conditions at 1250 °C from powder prepared by two different processing routines, with the aim of optimizing the SWNTs dispersion throughout the ceramic matrix. High densification and submicrometric grain size were achieved in all the composites. Electrical properties of the composites were characterized in a wide temperature range, and modeling of the impedance properties was approached by means of an equivalent circuit that allows separation of the individual SWNT bundles contribution to resistance from the resistance due to junctions between bundles. Effects of the homogeneous distribution of SWNTs at the ceramic grain boundaries on the crystalline phases, percolation threshold, total conductivity and evolution of junctions׳ resistivity with tem...
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Cita: Poyato Galán, R., Macías Delgado, J., Gallardo López, A., Muñoz Bernabé, A. y Domínguez Rodríguez, A. (2015). Microstructure and impedance spectroscopy of 3YTZP/SWNT ceramic nanocomposites. Ceramics International, 41 (1), 12861-12868.
Tamaño: 1.106Mb
Formato: PDF

URI: https://hdl.handle.net/11441/72164

DOI: 10.1016/j.ceramint.2015.06.123

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