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Caracterización de las propiedades eléctricas locales del CaCu3 Ti4 O12.

Valdez Nava, Zarel and Cheballah, Chafé and Laudebat, Lionel and Lebey, Thierry and Guillemet, Sophie Caracterización de las propiedades eléctricas locales del CaCu3 Ti4 O12. (2012) Ingenierias, 15 (57). 12-18. ISSN 1405-0676

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Official URL: http://ingenierias.uanl.mx/57/57_caracterizacion_de_las_propiedades.pdf


CaCu3Ti4O12 (CCTO) is a material that presents a colossal dielectric constant (>105). In this work, CCTO was synthesized by chemical coprecipitation and sintered at 1050°C. Electrical properties were studied in bulk ceramic materials, as well as on individual grains and trough grain boundaries in alternative regime and continuous current. In AC regime, grains and grain boundaries show a resistive-like behavior. In DC regime local grain and grain boundary measurements do not allow determining the origin of the non-symmetric response in the bulk samples. It is finally found that non-ohmic contact between the heterogeneous ceramic and the electrodes could explain both the bulk and local electrical behaviors.

Item Type:Article
HAL Id:hal-03526711
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Université de Toulouse > Institut National Universitaire Champollion - INU (FRANCE)
Laboratory name:
Deposited On:03 Jun 2019 10:02

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