Electrical and dielectric characterization of Bi 12 GeO20 preparedby modified pechini method

Moraes, Carlos Gustavo Pereira; Jesus, Fabiane Alexsandra Andrade de; Macedo, Zélia Soares

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Campo DC	Valor	Idioma
dc.contributor.author	Moraes, Carlos Gustavo Pereira	-
dc.contributor.author	Jesus, Fabiane Alexsandra Andrade de	-
dc.contributor.author	Macedo, Zélia Soares	-
dc.date.accessioned	2026-02-02T19:58:34Z	-
dc.date.available	2026-02-02T19:58:34Z	-
dc.date.issued	2014	-
dc.identifier.citation	MORAES, C. G. P.; JESUS, F. A. A.; MACEDO, Z. S. Electrical and dielectric characterization of Bi 12 GeO20 preparedby modified pechini method. Advances in Condensed Matter Physics, New York, n. 1, 2014. Disponível em: https://onlinelibrary.wiley.com/doi/epdf/10.1155/2014/968349. Acesso em: 2 fev. 2026.	pt_BR
dc.identifier.issn	1687-8124	-
dc.identifier.uri	https://ri.ufs.br/jspui/handle/riufs/24468	-
dc.language	eng	pt_BR
dc.publisher	Hindawi Publishing Corporation	pt_BR
dc.relation.ispartof	Advances in Condensed Matter Physics	pt_BR
dc.subject	Dielectric characterization	eng
dc.subject	Bismuth germanate	eng
dc.subject	Pechini route	eng
dc.title	Electrical and dielectric characterization of Bi 12 GeO20 preparedby modified pechini method	pt_BR
dc.type	Artigo	pt_BR
dc.identifier.license	Creative Commons Atribuição 3.0 Não Adaptada (CC BY 3.0)	pt_BR
dc.description.resumo	Bismuth germanate (Bi12 GeO 20 ) ceramics were produced using modified Pechini route, and the synthesis parameters, crystallinephases, microstructure, and sintering conditions were investigated. Bi 12 GeO 20 powders with submicrometric particle sizes wereinvestigated for calcination temperatures from 400 to 600 C, with soaking times of 1 h and 5 h. Controlling the synthesis parameters,dense ceramics with two different grain sizes of 3.4 ± 0.5 um and 5.7 ± 0.8 um could be produced after sintering at 750∘C/1 h.The electric and dielectric properties of these ceramics were determined by impedance spectroscopy (IS). From the results, itwas concluded that the dielectric permittivity measured at high frequencies is insensitive to the grain size, while the AC darkconductivity presents a noticeable dependency on this feature. This behaviour was discussed on the basis of a Maxwell-Wagnerinterfacial relaxation, whose intensity depends directly on the volume fraction of grain boundaries in the sample.	pt_BR
dc.description.local	New York	pt_BR
dc.identifier.doi	https://doi.org/10.1155/2014/968349	-
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