Domain structure-dielectric property relationship in lead-free (1−x)(Bi1/2Na1/2)TiO3xBaTiO3 ceramics Ma, C. Tan, Xiaoli Tan, Xiaoli Dul'kin, E. Roth, M.
dc.contributor.department Materials Science and Engineering 2018-02-13T17:44:55.000 2020-06-30T06:08:53Z 2020-06-30T06:08:53Z Fri Jan 01 00:00:00 UTC 2010 2013-06-14 2010-11-23
dc.description.abstract <p>The domain morphology and crystal structure of (1−x)(Bi1/2Na1/2)TiO3xBaTiO3 lead-free piezoelectric ceramics were systematically studied with transmission electron microscopy for compositions x=0.04through 0.11. It was found that the ceramics with compositions x<0.06 display a R3csymmetry with ferroelectric domains of ∼100 nm forming complex structures at room temperature. Only nanodomains with faint contrast were observed in the compositions of 0.07≤x≤0.09. The presence of weak 1/2 (ooe)superlattice diffraction spots and absence of 1/2 (ooo) ones (o stands for odd and e stands for even miller indices) seem to suggest a P4bm symmetry at room temperature. The morphotropic phase boundary composition x=0.06 showed mixed R3c and P4bm phases. Large lamellar ferroelectric domains with P4mm symmetry were found to dominate in the ceramic of x=0.11. The observed domain structure correlates extremely well with the frequency dispersion of dielectric constant at room temperature and a new concept “relaxor antiferroelectric” was proposed to describe the dielectric behavior of compositions 0.07≤x≤0.09. These results are summarized in a phase diagram for unpoled ceramics in the (1−x)(Bi1/2Na1/2)TiO3xBaTiO3binary solid solution system.</p>
dc.description.comments <p>The following article appeared in <em>Journal of Applied Physics</em> 108 (2010): 104105 and may be found at <a href="" target="_blank"></a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1008
dc.identifier.contextkey 4834502
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath mse_pubs/6
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 01:05:19 UTC 2022
dc.source.uri 10.1063/1.3514093
dc.subject.disciplines Ceramic Materials
dc.subject.disciplines Materials Science and Engineering
dc.subject.keywords Ceramics
dc.subject.keywords Relaxor ferroelectrics
dc.subject.keywords Dielectrics
dc.subject.keywords Sodium
dc.subject.keywords Transmission electron microscopy
dc.subject.keywords Crystal structure
dc.subject.keywords Phase diagrams
dc.subject.keywords Superlattices
dc.subject.keywords Lead
dc.subject.keywords Ozone
dc.title Domain structure-dielectric property relationship in lead-free (1−x)(Bi1/2Na1/2)TiO3xBaTiO3 ceramics
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 62adb010-61c7-4fc2-a651-d8b152a926a9
relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
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