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

Zhijian Shen, Haixue Yan, Daniel Grüner, Lyubov M. Belova, Yasuhiro Sakamoto, Jianfeng Hu, Ce Wen Nan, Thomas Höche, Michael J. Reece

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9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)23547-23552
Number of pages6
JournalJournal of Materials Chemistry
Volume22
Issue number44
DOIs
Publication statusPublished - 2012 Nov 28

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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    Shen, Z., Yan, H., Grüner, D., Belova, L. M., Sakamoto, Y., Hu, J., Nan, C. W., Höche, T., & Reece, M. J. (2012). Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano-crystals. Journal of Materials Chemistry, 22(44), 23547-23552. https://doi.org/10.1039/c2jm32191b