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Grain size effect on the nonlinear dielectric properties of barium titanate ceramics
Alexandru Ioan Cuza University.
IENI-CNR.
IENI-CNR.
Department of Materials and Environmental Chemistry, University of Stockholm.ORCID iD: 0000-0003-3060-9987
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2010 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 97, no 24Article in journal (Refereed) Published
Abstract [en]

The nonlinear dielectric properties of dense BaTiO(3) ceramics with grain size of 1 mu m-90 nm were investigated. In the finest ceramics, the permittivity reduces below 1000 and a remarkable nonhysteretic linear dc-tunability [epsilon(E)] is obtained at high field, above 40 kV/cm. The observed behavior was explained by considering the nanostructured ceramic as a composite formed by ferroelectric grains, whose nonlinearity is reducing, and by low-permittivity nonferroelectric grain boundaries, whose volume fraction increases when decreasing the grain size. Reducing the grain size in ferroelectric dense materials is an alternative route to accomplish the application requirements: nonhysteretic tunability and permittivity below 1000.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2010. Vol. 97, no 24
Keyword [en]
Alternative routes, Application requirements, Barium titanate ceramics, Dense materials, Ferroelectric grains, Grain size, Grain size effect, High field, Nanostructured ceramic, Non-Linearity, Nonlinear dielectric properties, Tunabilities
National Category
Ceramics Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-86997DOI: 10.1063/1.3526375ISI: 000285481000061OAI: oai:DiVA.org:kth-86997DiVA: diva2:501278
Note
QC 20120215Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2017-12-07Bibliographically approved

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