Show simple item record

dc.contributor.authorYao, Yingbang
dc.contributor.authorMak, C. L.
dc.contributor.authorPloss, Bernd
dc.date.accessioned2015-08-03T10:38:04Z
dc.date.available2015-08-03T10:38:04Z
dc.date.issued2012-12
dc.identifier.issn09552219
dc.identifier.doi10.1016/j.jeurceramsoc.2012.07.034
dc.identifier.urihttp://hdl.handle.net/10754/562433
dc.description.abstractAlkali-doped strontium barium niobate (K 0.5Na 0.5) 2x(Sr 0.6Ba 0.4) 5-xNb 10O 30 (KNSBN) ceramics has been prepared by a conventional solid-state reaction method. The alkali-dopant concentration x has been varied from 0.24 to 1.15 so that the crystal structure was transformed from 'unfilled' to 'filled' tetragonal tungsten-bronze (TTB) structure. Apart from the change in the structural properties, the effects of the alkali-dopants on the phase transition as well as ferroelectric, piezoelectric and pyroelectric properties have also been investigated. Phase transitions have been studied in the temperature range of -200°C to 350°C. The origins of these phase transitions are discussed. The addition of the alkali-dopants enhances the ferroelectric, piezoelectric and pyroelectric properties of the KNSBN ceramics. Alkali-doping also favors abnormal grain growth and thus results in a porous microstructure, which might contribute to the enhancement of the pyroelectric performance. © 2012 Elsevier Ltd.
dc.publisherElsevier BV
dc.subjectDoping
dc.subjectPorosity
dc.subjectPyroelectricity
dc.subjectStrontium barium niobate
dc.titlePhase transitions and electrical characterizations of (K 0.5Na 0.5) 2x(Sr 0.6Ba 0.4) 5-xNb 10O 30 (KNSBN) ceramics with 'unfilled' and 'filled' tetragonal tungsten-bronze (TTB) crystal structure
dc.typeArticle
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Lab
dc.contributor.departmentCore Labs
dc.identifier.journalJournal of the European Ceramic Society
dc.contributor.institutionDepartment of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
dc.contributor.institutionDepartment of SciTec, University of Applied Sciences Jena, Carl-Zeiss-Promenade 2, 07743 Jena, Germany
kaust.personYao, Yingbang


This item appears in the following Collection(s)

Show simple item record