Ferroelectric ceramics with enhanced remnant polarization by ordered coalescence of nano- crystals
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
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.
IdentifiersURN: urn:nbn:se:su:diva-84796DOI: 10.1039/c2jm32191bISI: 000310934400033OAI: oai:DiVA.org:su-84796DiVA: diva2:581777