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Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano-crystals
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.ORCID iD: 0000-0003-4889-4210
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2012 (English)In: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 22, no 44, 23547-23552 p.Article in journal (Refereed) Published
Abstract [en]

An exceptional high ferroelectric remnant polarization (P-r) 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 P-r 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.

Place, publisher, year, edition, pages
2012. Vol. 22, no 44, 23547-23552 p.
Keyword [en]
Barium Titanate, Films, Dense
National Category
Chemical Sciences Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-109180DOI: 10.1039/c2jm32191bISI: 000310934400033Scopus ID: 2-s2.0-84870397011OAI: oai:DiVA.org:kth-109180DiVA: diva2:582900
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research
Note

QC 20130107

Available from: 2013-01-07 Created: 2012-12-21 Last updated: 2017-12-06Bibliographically approved

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Belova, Lyubov M.

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