Effects of Ca-dopant on the pyroelectric, piezoelectric and dielectric properties of (Sr 0.6Ba 0.4) 4Na 2Nb 10O 30 ceramics

Handle URI:
http://hdl.handle.net/10754/562430
Title:
Effects of Ca-dopant on the pyroelectric, piezoelectric and dielectric properties of (Sr 0.6Ba 0.4) 4Na 2Nb 10O 30 ceramics
Authors:
Yao, Yingbang; Mak, C. L.
Abstract:
Calcium-doped sodium strontium barium niobate (SBNN, (Sr 0.6Ba 0.4) 4-xCa xNa 2Nb 10O 30, 0 ≤ x ≤ 0.5) ceramics were prepared by a conventional solid-state reaction method. SBNN showed 'filled' tetragonal tungsten-bronze structure with fully occupied A-sites. The tetragonal structure, as revealed by X-ray diffraction (XRD) and Raman spectroscopy, was not affected by the Ca-dopant. Effects of Ca-doping concentration on the phase transitions as well as ferroelectric, piezoelectric and pyroelectric properties of the SBNN ceramics were investigated. From the dielectric studies, two anomalies were observed, namely, a sharp normal ferroelectric transition at 260 °C and a broad maximum at round -110 °C. The later was affected by the Ca-doping concentration and its origin was discussed. At x = 0.3, the sample exhibited the highest pyroelectric coefficient of 168 μC/m 2 K and the largest piezoelectric coefficient (d 33) of 63 pC/N at room temperature. On the basis of our results, the pyroelectric properties of the SBNN were improved by Ca-doping. © 2012 Elsevier B.V. All rights reserved.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab; Core Labs
Publisher:
Elsevier BV
Journal:
Journal of Alloys and Compounds
Issue Date:
Dec-2012
DOI:
10.1016/j.jallcom.2012.07.038
Type:
Article
ISSN:
09258388
Sponsors:
This research was supported by a research grant from the Hong Kong Polytechnic University (Grant No. GYJ72).
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorYao, Yingbangen
dc.contributor.authorMak, C. L.en
dc.date.accessioned2015-08-03T10:37:58Zen
dc.date.available2015-08-03T10:37:58Zen
dc.date.issued2012-12en
dc.identifier.issn09258388en
dc.identifier.doi10.1016/j.jallcom.2012.07.038en
dc.identifier.urihttp://hdl.handle.net/10754/562430en
dc.description.abstractCalcium-doped sodium strontium barium niobate (SBNN, (Sr 0.6Ba 0.4) 4-xCa xNa 2Nb 10O 30, 0 ≤ x ≤ 0.5) ceramics were prepared by a conventional solid-state reaction method. SBNN showed 'filled' tetragonal tungsten-bronze structure with fully occupied A-sites. The tetragonal structure, as revealed by X-ray diffraction (XRD) and Raman spectroscopy, was not affected by the Ca-dopant. Effects of Ca-doping concentration on the phase transitions as well as ferroelectric, piezoelectric and pyroelectric properties of the SBNN ceramics were investigated. From the dielectric studies, two anomalies were observed, namely, a sharp normal ferroelectric transition at 260 °C and a broad maximum at round -110 °C. The later was affected by the Ca-doping concentration and its origin was discussed. At x = 0.3, the sample exhibited the highest pyroelectric coefficient of 168 μC/m 2 K and the largest piezoelectric coefficient (d 33) of 63 pC/N at room temperature. On the basis of our results, the pyroelectric properties of the SBNN were improved by Ca-doping. © 2012 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis research was supported by a research grant from the Hong Kong Polytechnic University (Grant No. GYJ72).en
dc.publisherElsevier BVen
dc.subjectDielectric propertiesen
dc.subjectPiezoelectricen
dc.subjectPyroelectric propertiesen
dc.subjectRaman spectroscopyen
dc.subjectSodium strontium barium niobateen
dc.titleEffects of Ca-dopant on the pyroelectric, piezoelectric and dielectric properties of (Sr 0.6Ba 0.4) 4Na 2Nb 10O 30 ceramicsen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentCore Labsen
dc.identifier.journalJournal of Alloys and Compoundsen
dc.contributor.institutionDepartment of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kongen
kaust.authorYao, Yingbangen
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