DC Field | Value | Language |
---|---|---|
dc.contributor.author | Fisher, John G. | ko |
dc.contributor.author | Rout, Dibyaranjan | ko |
dc.contributor.author | Moon, Kyoung-Seok | ko |
dc.contributor.author | Kang, Suk-Joong L | ko |
dc.date.accessioned | 2013-03-11T17:09:23Z | - |
dc.date.available | 2013-03-11T17:09:23Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010-04 | - |
dc.identifier.citation | MATERIALS CHEMISTRY AND PHYSICS, v.120, no.2-3, pp.263 - 271 | - |
dc.identifier.issn | 0254-0584 | - |
dc.identifier.uri | http://hdl.handle.net/10203/99687 | - |
dc.description.abstract | The effect of sintering atmosphere on the structure and phase transitions of (K0.5Na0.5)NbO3 lead-free piezoelectric ceramics has been studied. Ceramics were produced by sintering in atmospheres of O-2, air, 75 N-2-25 H-2 (mol%) and H-2. Their phase transition behaviour and structure were characterised using differential scanning calorimetry, X-ray diffraction (XRD), and Raman spectroscopy at both ambient and elevated temperatures. Room temperature XRD showed changes in the lattice parameters and a decrease in the orthorhombic distortion of the (K0.5Na0.5)NbO3 unit cell in samples sintered in 75 N-2-25 H-2 (mol%) and H-2. Differential scanning calorimetry, high-temperature XRD and high-temperature Raman scattering showed that sintering samples in reducing atmospheres lowers the orthorhombic-tetragonal and tetragonal-cubic phase transition temperatures. These phase transitions also changed in nature, becoming less first-order and more diffuse. Changes in Raman peak position and width as the sintering atmosphere became more reducing may indicate an increase in oxygen vacancy concentration and decreased A-site ordering. (c) 2009 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | DIFFUSE PHASE-TRANSITION | - |
dc.subject | PULSED-LASER DEPOSITION | - |
dc.subject | OXYGEN PARTIAL-PRESSURE | - |
dc.subject | 1ST-PRINCIPLES CALCULATION | - |
dc.subject | SCATTERING INVESTIGATIONS | - |
dc.subject | STRONTIUM-TITANATE | - |
dc.subject | BARIUM-TITANATE | - |
dc.subject | GRAIN-GROWTH | - |
dc.subject | BATIO3 | - |
dc.subject | NANBO3 | - |
dc.title | High-temperature X-ray diffraction and Raman spectroscopy study of (K0.5Na0.5)NbO3 ceramics sintered in oxidizing and reducing atmospheres | - |
dc.type | Article | - |
dc.identifier.wosid | 000276984600007 | - |
dc.identifier.scopusid | 2-s2.0-77949272154 | - |
dc.type.rims | ART | - |
dc.citation.volume | 120 | - |
dc.citation.issue | 2-3 | - |
dc.citation.beginningpage | 263 | - |
dc.citation.endingpage | 271 | - |
dc.citation.publicationname | MATERIALS CHEMISTRY AND PHYSICS | - |
dc.identifier.doi | 10.1016/j.matchemphys.2009.11.001 | - |
dc.contributor.localauthor | Kang, Suk-Joong L | - |
dc.contributor.nonIdAuthor | Fisher, John G. | - |
dc.contributor.nonIdAuthor | Rout, Dibyaranjan | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Ceramics | - |
dc.subject.keywordAuthor | Raman spectroscopy and scattering | - |
dc.subject.keywordAuthor | Crystal structure | - |
dc.subject.keywordAuthor | Phase transitions | - |
dc.subject.keywordPlus | DIFFUSE PHASE-TRANSITION | - |
dc.subject.keywordPlus | PULSED-LASER DEPOSITION | - |
dc.subject.keywordPlus | OXYGEN PARTIAL-PRESSURE | - |
dc.subject.keywordPlus | 1ST-PRINCIPLES CALCULATION | - |
dc.subject.keywordPlus | SCATTERING INVESTIGATIONS | - |
dc.subject.keywordPlus | STRONTIUM-TITANATE | - |
dc.subject.keywordPlus | BARIUM-TITANATE | - |
dc.subject.keywordPlus | GRAIN-GROWTH | - |
dc.subject.keywordPlus | BATIO3 | - |
dc.subject.keywordPlus | NANBO3 | - |
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