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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics


A High-Temperature-Capacitor Dielectric Based on K0.5Na0.5NbO3-Modified Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3

DC Field Value Language Dittmer, Robert ko Anton, Eva-Maria ko Jo, Wook ko Simons, Hugh ko Daniels, John E. ko Hoffman, Mark ko Pokorny, Jan ko Reaney, Ian M. ko Roedel, Juergen ko 2014-10-21T08:34:39Z - 2014-10-21 ko 2012-11 -
dc.identifier.citation JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.95, no.11, pp.3519 - 3524 ko
dc.identifier.issn 0002-7820 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract A high-temperature dielectric, (1x)(0.6Bi(1/2)Na(1/2)TiO(3)0.4Bi(1/2)K(1/2)TiO(3))xK(0.5)Na(0.5)NbO(3), off the morphotropic phase boundary of the parent matrix 0.8Bi(1/2)Na(1/2)TiO(3)0.2Bi(1/2)K(1/2)TiO(3), has been developed for application as a high-temperature capacitor. In addition to temperature-dependent permittivity and dielectric loss, DC conductivity and field-dependent permittivity are reported. These properties are correlated with temperature-dependent structure data measured at different length scales using Raman spectroscopy and neutron diffraction. It is suggested that all materials investigated are ergodic relaxors with two types of polar nanoregions providing different relaxation mechanisms. The most attractive properties for application as high-temperature dielectrics are obtained in a material with x,=,0.15 at less than 10% variation of relative permittivity of about 2100 between 54 degrees C and 400 degrees C. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher WILEY-BLACKWELL ko
dc.subject Dc conductivity ko
dc.subject Different length scale ko
dc.subject Ergodics ko
dc.subject Field-dependent permittivity ko
dc.subject High temperature ko
dc.subject Morphotropic phase boundaries ko
dc.subject Polar nanoregions ko
dc.subject Relative permittivity ko
dc.subject Relaxation mechanism ko
dc.subject Relaxors ko
dc.subject Structure data ko
dc.subject Temperature dependent ko
dc.subject TiO ko
dc.title A High-Temperature-Capacitor Dielectric Based on K0.5Na0.5NbO3-Modified Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3 ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84868453183 ko
dc.identifier.wosid 000310600900029 ko
dc.type.rims ART ko
dc.description.wostc 19 *
dc.description.scopustc 14 * 2015-05-06 * 2014-10-21 *
dc.identifier.doi 10.1111/j.1551-2916.2012.05321.x ko
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