Nanocrystalline versus microcrystalline Lo2O:B2O 3 composites: Anomalous ionic conductivities and percolation theory

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dc.identifier.uri http://dx.doi.org/10.15488/2230
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2256
dc.contributor.author Indris, Sylvio
dc.contributor.author Heitjans, Paul
dc.contributor.author Roman, H. Eduardo
dc.contributor.author Bunde, Armin
dc.date.accessioned 2017-11-10T17:19:18Z
dc.date.available 2017-11-10T17:19:18Z
dc.date.issued 2000
dc.identifier.citation Indris, S.; Heitjans, P.; Eduarde Roman, H.; Bunde, A.: Nanocrystalline versus microcrystalline Lo2O:B2O 3 composites: Anomalous ionic conductivities and percolation theory. In: Physical Review Letters 84 (2000), Nr. 13, 2889. DOI: https://doi.org/10.1103/PhysRevLett.84.2889
dc.description.abstract We study ionic transport in nano- and microcrystalline (1−x)Li2O:xB2O3 composites using standard impedance spectroscopy. In the nanocrystalline samples (average grain size of about 20 nm), the ionic conductivity σdc increases with increasing content x of B2O3 up to a maximum at x≈0.5. Above x≈0.92, σdc vanishes. By contrast, in the microcrystalline samples (grain size about 10μm), σdc decreases monotonically with x and vanishes above x≈0.55. We can explain this strikingly different behavior by a percolation model that assumes an enhanced conductivity at the interfaces between insulating and conducting phases in both materials and explicitly takes into account the different grain sizes. © 2000 The American Physical Society. eng
dc.language.iso eng
dc.publisher College Park, ML : American Physical Society
dc.relation.ispartofseries Physical Review Letters 84 (2000), Nr. 13
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
dc.subject Conducting phases eng
dc.subject Ion conductivities eng
dc.subject Microcrystallines eng
dc.subject Percolation theory eng
dc.subject Boron compounds eng
dc.subject Differential thermal analysis eng
dc.subject Electric conductivity eng
dc.subject Grain boundaries eng
dc.subject Grain size and shape eng
dc.subject Ion implantation eng
dc.subject Nanostructured materials eng
dc.subject Percolation (solid state) eng
dc.subject Spectroscopic analysis eng
dc.subject X ray diffraction analysis eng
dc.subject Lithium compounds eng
dc.subject.ddc 530 | Physik ger
dc.title Nanocrystalline versus microcrystalline Lo2O:B2O 3 composites: Anomalous ionic conductivities and percolation theory
dc.type article
dc.type Text
dc.relation.issn 00319007
dc.relation.doi https://doi.org/10.1103/PhysRevLett.84.2889
dc.bibliographicCitation.issue 13
dc.bibliographicCitation.volume 84
dc.bibliographicCitation.firstPage 2889
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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