Correlation between the activation enthalpy and Kohlrausch exponent for ionic conductivity in oxide glasses

dc.contributor.author Ngai, Kia
dc.contributor.author Martin, Steve
dc.contributor.author Martin, Steve
dc.contributor.department Materials Science and Engineering
dc.date 2018-02-13T19:50:55.000
dc.date.accessioned 2020-06-30T06:09:00Z
dc.date.available 2020-06-30T06:09:00Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 1989
dc.date.embargo 2013-08-18
dc.date.issued 1989-11-15
dc.description.abstract <p>We have established for alkali ions in oxide glasses a strong correlation between the fractional (Kohlrausch) exponent <em>β</em> in the conductivity relaxation function, exp[-(t/τ*)β], and the activation energy E*a of τ* and <em>σ</em> when varying the composition of oxide glass formers and the alkali ions while holding the alkali-ion concentration constant. An even stronger correlation of the trends in <em>β</em> and the product βE*a is found. These correlations were expected conceptually by the coupling model for conductivity relaxation, and the latter was the motivation behind the present undertaking of the establishment of the correlation from experimental data. The glass-forming oxides considered include P2O5, SiO2, B2O3, Al2O3-B2O3, GeO2, and Al2O3-GeO2. In all, some 89 different compositions were examined and the alkali oxides considered include Li2O, Na2O, K2O, Rb2O, and some of their binary mixtures. The correlation will have a bearing on the viability of theoretical models of conductivity relaxation.</p>
dc.description.comments <p>This article is from <em>Physical Review B</em> 40 (1989): 10550–10556, doi:<a href="http://dx.doi.org/10.1103/PhysRevB.40.10550" target="_blank">10.1103/PhysRevB.40.10550</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/mse_pubs/74/
dc.identifier.articleid 1075
dc.identifier.contextkey 5036311
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath mse_pubs/74
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/55765
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/mse_pubs/74/1989_NgaiKL_CorrelationBetweenActivation.pdf|||Sat Jan 15 01:47:11 UTC 2022
dc.source.uri 10.1103/PhysRevB.40.10550
dc.subject.disciplines Ceramic Materials
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Materials Science and Engineering
dc.title Correlation between the activation enthalpy and Kohlrausch exponent for ionic conductivity in oxide glasses
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication e0385671-f8e7-4ceb-ba14-162c8acd29dd
relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
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