Please use this identifier to cite or link to this item: https://repositorio.ufba.br/handle/ufba/585
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dc.contributor.authorNascimento, Marcio Luis Ferreira-
dc.contributor.authorNascimento, Eduardo do-
dc.contributor.authorPontuschka, Walter Maigon-
dc.contributor.authorMatusuoka, Masao-
dc.contributor.authorWatanabe, Shigueo-
dc.date.accessioned2010-11-10T20:07:59Z-
dc.date.available2010-11-10T20:07:59Z-
dc.date.issued2006-01-01-
dc.identifier.issn03666913-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ufba/585-
dc.description.abstractWe collected and analyzed literature data on ionic conductivity sigma and activation energy EA in the binary sodium silicate system in a wide composition range. The Anderson and Stuart model has been considered to describe the decreasing tendency of activation energy EA with alkali concentration in this system. In this analysis were considered experimental parameters, such as shear modulus G and relative dielectric permittivity e. A general conductivity rule is found in 194 of 205 glasses, when one plots log sigma vs. EA/kBT, where kB is the Boltzmann constant and T is the absolute temperature. This fact means that the arrhenian relation has universal uniqueness of form sigma=sigma(EA,T) in wide Na2O composition range. The results also show that there is strong correlation by more than 19 orders of magnitude on conductivity with EA/kBT. An explanation for this behavior links ionic conductivity and microscopic structure. The problem of phase separation in this system is also considered.en
dc.description.provenanceSubmitted by Marcio Luis Ferreira Nascimento (mlfn@ufba.br) on 2010-11-10T20:07:59Z No. of bitstreams: 1 AndersonStuart-NS2-General-C52-Nascimento.pdf: 516515 bytes, checksum: d5b7af44e61a206376ab39291ab20323 (MD5)en
dc.description.provenanceMade available in DSpace on 2010-11-10T20:07:59Z (GMT). No. of bitstreams: 1 AndersonStuart-NS2-General-C52-Nascimento.pdf: 516515 bytes, checksum: d5b7af44e61a206376ab39291ab20323 (MD5) Previous issue date: 2006-01-01en
dc.language.isoenen
dc.subjectVidroen
dc.subjectCondutividadeen
dc.subjectAnderson-Stuarten
dc.subjectModeloen
dc.titleTest of Anderson-Stuart model in sodium silicate glasses and the general arrhenian conductivity rule in wide composition rangeen
dc.typeArtigo de Periódicopt_BR
dc.typeArtigo de Periódicoen
dc.description.localpubBrasilen
dc.identifier.numberCerâmica, Brazil, v. 52, n. 321, p. 22-30en
Appears in Collections:Artigos Publicados em Periódicos (PEI)

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