Preparation and characterization of Na2O-Al2O3-B2O3 sol-gel glasses with aluminum lactate and formiate as precursors

dc.bibliographicCitation.firstPage165
dc.bibliographicCitation.journalTitleGlass Science and Technologyeng
dc.bibliographicCitation.lastPage172
dc.bibliographicCitation.volume78
dc.contributor.authorHoyer, Lars P.
dc.contributor.authorHelsch, Gundula
dc.contributor.authorFrischat, Günther Heinz
dc.contributor.authorZhang, Long
dc.contributor.authorEckert, Hellmut
dc.date.accessioned2023-12-15T15:29:01Z
dc.date.available2023-12-15T15:29:01Z
dc.date.issued2005
dc.description.abstractIn this work aluminum lactate and aluminum formiate have been used as precursors to obtain room temperature stable sols and gels and after annealing homogeneous glasses in the System Na2O-Al2O3-B2O3. The local environments and connectivities of boron and aluminum have been investigated by 11B and 27Al solid-state nuclear magnetic resonance (NMR). It was found that the local atomic structures of the sol-gel glasses markedly depend on the precursors and the preparation routes and are also dissimilar to those of melt quenched glasses of the same compositions. Thus, for example, the fractions of BO3/2 and BO4/2 units differ and it is interesting to note that there are no asymmetric ΒO2/2(O-) units present in the sol-gel materials. The 27Al spectra show AI in four-, five- and sixfold coordination, whose relative abundance in a given glass composition is also dependent on the preparadon route. Rotational echo double resonance (REDOR) 11B {27Al} and 27Al {11B} resuhs indicate that the extent of B-O-Al connectivity is diminished in the gel prepared glasses when compared to the melt cooled glasses. Element distributions are reported on the basis of secondary neutral mass spectrometry (SNMS) data, and the nanostructures of surfaces have been characterized by atomic force microscopy (AFM).
dc.description.versionpublishedVersion
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/13874
dc.identifier.urihttps://doi.org/10.34657/12904
dc.language.isoeng
dc.publisherOffenbach : Verlag der Deutschen Glastechnischen Gesellschaft
dc.relation.issn0946-7475
dc.rights.licenseCC BY 3.0 DE
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/de/
dc.subject.ddc660
dc.titlePreparation and characterization of Na2O-Al2O3-B2O3 sol-gel glasses with aluminum lactate and formiate as precursors
dc.typearticle
dc.typeText
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