Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/927
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dc.contributor.authorTeixeira, Nayara Gomes-
dc.contributor.authorDias, Anderson-
dc.contributor.authorMoreira, Roberto Luiz-
dc.date.accessioned2012-07-02T18:51:17Z-
dc.date.available2012-07-02T18:51:17Z-
dc.date.issued2007-
dc.identifier.citationTEIXEIRA, N. G.; DIAS, A.; MOREIRA, R. L. Raman scattering study of the high temperature phase transitions of NaTaO3. Journal of the European Ceramic Society, v. 27, n.13-15, p.3683–3686, mar. 2007. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0955221907000581>. Acesso em: 02 jul. 2012.pt_BR
dc.identifier.issn09552219-
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/927-
dc.description.abstractThe phase transition sequence of sodium tantalate (NaTaO3) ceramic samples has been investigated by Raman spectroscopy, from room temperature up to 640 ◦C. At room temperature, NaTaO3 shows an orthorhombically distorted perovskite structure belonging to the Pbnm space group. Raman and infrared vibrational spectra at 20 ◦C are in relative good agreement with group theory predictions for this group. At high temperatures, NaTaO3 shows three phase transitions, in the sequence Pbnm (∼450 ◦C) Cmcm (∼560 ◦C) P4/mbm (∼620 ◦C) Pm¯3m. The Raman spectra for the two intermediate high temperature phases showed a decreasing of the number of the active modes, accompanied by band broadening, and were well compatible with structural symmetry increasing at higher temperatures.pt_BR
dc.language.isoen_USpt_BR
dc.subjectDielectric propertiespt_BR
dc.subjectCapacitorspt_BR
dc.subjectSinteringpt_BR
dc.subjectSpectroscopypt_BR
dc.subjectPerovskitespt_BR
dc.titleRaman scattering study of the high temperature phase transitions of NaTaO3.pt_BR
dc.typeArtigo publicado em periodicopt_BR
dc.rights.licenseO Periódico Journal of the European Ceramic Society concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3333160050143-
Appears in Collections:DEQUI - Artigos publicados em periódicos

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