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Grain-size effects on the ferroelectric behavior of dense nanocrystalline BaTiO3 ceramics (Articolo in rivista)

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Grain-size effects on the ferroelectric behavior of dense nanocrystalline BaTiO3 ceramics (Articolo in rivista) (literal)

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Zhe Zhao; Vincenzo Buscaglia; Massimo Viviani; Maria Teresa Buscaglia; Liliana Mitoseriu; Andrea Testino; Mats Nygren; Mats Johnsson; Paolo Nanni (2004)
Grain-size effects on the ferroelectric behavior of dense nanocrystalline BaTiO3 ceramics
in Physical review. B, Condensed matter and materials physics; American Physical Society (APS), College Pk (Stati Uniti d'America)
(literal)

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Zhe Zhao; Vincenzo Buscaglia; Massimo Viviani; Maria Teresa Buscaglia; Liliana Mitoseriu; Andrea Testino; Mats Nygren; Mats Johnsson; Paolo Nanni (literal)

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http://puma.isti.cnr.it/linkres.php?resource=cnr.ieni/cnr.ieni.ge/2004-A0-015 (literal)

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Rivista

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In: Physical Review B, vol. 70 (2) pp. 1-8. The American Physical Society, 2004. (literal)

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Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden; Institute for Energetics and Interphases, Department of Genoa, National Research Council, via De Marini 6, I-16149 Genoa, Italy; Department of Process and Chemical Engineering, University of Genoa, Fiera del Mare, I-16129 Genoa, Italy; Department of Electricity and Electronics, University Al. I. Cuza Iasi, 700504, Romania (literal)

Titolo

Grain-size effects on the ferroelectric behavior of dense nanocrystalline BaTiO3 ceramics (literal)

Abstract

A progressive reduction of tetragonal distortion, heat of transition, Curie temperature, and relative dielectric constant has been observed on dense BaTiO3 ceramics with grain size decreasing from 1200 to 50 nm. The correlations between grain size, extent of tetragonal distortion, and ferroelectric properties strongly support the existence of an intrinsic size effect. From the experimental trends the critical size for disappearance of ferroelectricity has been evaluated to be 10-30 nm. The strong depression of the relative permittivity observed for the nanocrystalline ceramics can be ascribed to the combination of the intrinsic size effect and of the sizedependent \"dilution\" effect of a grain boundary \"dead\" layer. (literal)

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