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Issue 44, 2012
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Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano-crystals

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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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Publication details

The article was received on 08 Apr 2012, accepted on 20 Sep 2012 and first published on 20 Sep 2012


Article type: Paper
DOI: 10.1039/C2JM32191B
Citation: 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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