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Colossal dielectric permittivity of BaTiO3-based nanocrystalline ceramics sintered by spark plasma sintering

Valdez-Nava, Zarel and Guillemet-Fritsch, Sophie and Tenailleau, Christophe and Lebey, Thierry and Durand, Bernard and Chane-Ching, Jean-Yves Colossal dielectric permittivity of BaTiO3-based nanocrystalline ceramics sintered by spark plasma sintering. (2009) Journal of Electroceramics, vol. 22 (n° 1 - 3). pp. 238-244. ISSN 1385-3449

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Official URL: http://dx.doi.org/10.1007/s10832-007-9396-8

Abstract

In pursuit of high permittivity materials for electronic application, there has been a considerable interest recently in the dielectric properties of various perovskite oxides like calcium copper titanate or lanthanum doped barium titanate. When processed in a particular way, this later material present at ambient temperature and at f= 1 kHz unusual interesting dielectric properties, a so called “colossal” permittivity value up to several 106 with relatively low dielectric losses. Moreover and contrary to what is classically expected and evidenced for this type of materials, no temperature dependence is observed. This behavior is observed in nanopowders based ceramics. An assumption to explain the observed properties is proposed. These results have important technological applications, since these nanoceramics open a new route to the fabrication of very thin dielectric films.

Item Type:Article
Additional Information:Thanks to Springer Verlag editor. The definitive version is available at http://www.springerlink.com/ The original PDF of the article can be found at Journal of Electroceramics website : http://www.springerlink.com/content/100285/?p=e0c61bb66f2047b299fa4c6cc06646e8&pi=0
Audience (journal):International peer-reviewed journal
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Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Celine Cabaup

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