Issue 44, 2012
From the journal:

Journal of Materials Chemistry

Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano-crystals

Zhijian Shen,*ad   Haixue Yan,b   Daniel Grüner,a   Lyubov M. Belova,c   Yasuhiro Sakamoto,a   Jianfeng Hu,a   Ce-Wen Nan,d   Thomas Höchee  and  Michael J. Reeceb  

* Corresponding authors

a Berzelii Center EXSELENT on Porous Materials and Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
E-mail: shen@mmk.su.se
Fax: +46-8-152187
Tel: +46-8-162388

b School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, UK
E-mail: h.x.yan@qmul.ac.uk
Tel: +44 (0)20-78825568

c Department of Materials Science and Engineering, Royal Institute of Technology, S-100 44 Stockholm, Sweden
E-mail: belova@mse.kth.se
Tel: +46-(0)8-790 8372

d Department of Materials Science and Engineering, State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
E-mail: cwnan@mail.tsinghua.edu.cn
Tel: +86-10-62773587

e Komponenten der Mikroelektronik und Mikrosystemtechnik, Fraunhofer-Institut für Werkstoffmechanik IWM, Walter-Hülse-Str. 1, D-06120 Halle, Germany
E-mail: thomas.hoeche@iwmh.fraunhofer.de
Fax: +49 345 55 89 101
Tel: +49 345 55 89 197

Abstract

An exceptional high ferroelectric remnant polarization (Pr) was observed in BaTiO3 ceramics owing to the formation of micron-sized grains possessing nano-scale mosaicity. Such a structural hierarchy was developed via a novel crystal-growth mechanism, namely ordered coalescence of nano-crystals achieved by synergetic atomic epitaxial growth and self-assembly of nano-crystals. The accommodating lattice defects in sub-grain boundaries due to the imperfect assembly of nano-crystals significantly contribute to the Pr enhancement by stimulating the dynamics of ferroelectric domain formation and switching. This finding defines a new approach to nanopowder sintering leading to enhanced properties sensitive to lattice defects.

Graphical abstract: Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano-crystals

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Article information

DOI
https://doi.org/10.1039/C2JM32191B
Article type
Paper
Submitted
08 Apr 2012
Accepted
20 Sep 2012
First published
20 Sep 2012

J. Mater. Chem., 2012,22, 23547-23552

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Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano-crystals

Z. Shen, H. Yan, D. Grüner, L. M. Belova, Y. Sakamoto, J. Hu, C. Nan, T. Höche and M. J. Reece, J. Mater. Chem., 2012, 22, 23547 DOI: 10.1039/C2JM32191B

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