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Grain size effect on the nonlinear dielectric properties of barium titanate ceramics
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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2010 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 97, no 24, 242909- p.Article 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
2010. Vol. 97, no 24, 242909- p.
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Natural Sciences
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URN: urn:nbn:se:su:diva-66239DOI: 10.1063/1.3526375ISI: 000285481000061OAI: oai:DiVA.org:su-66239DiVA: diva2:467420
Note
authorCount :5Available from: 2011-12-19 Created: 2011-12-19 Last updated: 2017-12-08Bibliographically approved

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