Synthesis and characterisation of La0.4Ba0.6Ti0.6RE0.4O3 (where RE =Y, Yb) ceramics.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorFeteira, Antônio-
Autor(es): dc.creatorElsebrock, R.-
Autor(es): dc.creatorDias, Anderson-
Autor(es): dc.creatorMoreira, Roberto Luiz-
Autor(es): dc.creatorLanagan, Michael T.-
Autor(es): dc.creatorSinclair, Derek C.-
Data de aceite: dc.date.accessioned2019-11-06T13:33:15Z-
Data de disponibilização: dc.date.available2019-11-06T13:33:15Z-
Data de envio: dc.date.issued2015-04-01-
Data de envio: dc.date.issued2015-04-01-
Data de envio: dc.date.issued2006-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4886-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557942-
Descrição: dc.descriptionLa0.4Ba0.6Ti0.6RE0.4O3 (where RE =Y, Yb) powders were synthesised by the mixed oxide route. According to laboratory X-ray diffractometry both compositions are single-phase and can be indexed on the Pm3m space group; however, electron diffraction suggests the occurrence of anti-phase octahedral tilting or 1:1 ordering. Ceramics fired at 1600 ◦C for 4 h exhibit an average grain size of ∼20_m. Bright field TEM images suggest the occurrence of chemical inhomogeneity in both compositions. The dc conductivities and Raman spectra are similar for both compositions; however, La0.4Ba0.6Ti0.6Y0.4O3 ceramics exhibit εr ∼57, quality factor (Qf)∼750 GHz and temperature coefficient of resonance (TCF)∼12 ppm/K, whereas La0.4Ba0.6Ti0.6Yb0.4O3 ceramics exhibit εr ∼65, Qf∼4500 GHz and TCF∼1 ppm/K.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of the European Ceramic Society concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577180790323.-
Palavras-chave: dc.subjectBaTiO3 and titanates-
Palavras-chave: dc.subjectDielectric properties-
Palavras-chave: dc.subjectElectron microscopy-
Palavras-chave: dc.subjectPerovskites-
Título: dc.titleSynthesis and characterisation of La0.4Ba0.6Ti0.6RE0.4O3 (where RE =Y, Yb) ceramics.-
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