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Title:High-temperature stabilization of bulk amorphous Al2O3
Authors:ID Mavrič, Andraž, University of Nova Gorica, Materials Research Laboratory, Vipavska 13, SI-5000 Nova Gorica, Slovenia (Author)
ID Fanetti, Mattia, University of Nova Gorica, Materials Research Laboratory, Vipavska 13, SI-5000 Nova Gorica, Slovenia (Author)
ID Mali, Gregor, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia (Author)
ID Valant, Matjaž, University of Nova Gorica, Materials Research Laboratory, Vipavska 13, SI-5000 Nova Gorica, Slovenia (Author)
Files:.pdf 05_JNon-CrystSolids_High-temperature_stabilization_of_bulk_amorphous_Al2O3.pdf (2,67 MB)
MD5: C9B9FE964AF359C66D01160B3F195C82
 
Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:We present a method for high temperature stabilization of bulk amorphous aluminium oxide. The stabilization is achieved by dispersing polysilane dendritic molecules in aluminium hydroxide gel, which upon thermal treatment gives amorphous aluminium oxide stable up to 900 °C. The dispersed macromolecules covalently bind to the alumina matrix and induce homogeneously distributed strain fields that keep the alumina amorphous. The thermal conversion of the precursor system was followed by thermogravimetry with an evolved gas analysis, infrared spectroscopy and 29Si NMR. The amorphous structure of aluminium oxide was confirmed with an X-ray and electron diffraction. Additionally, the amorphous state was supported by presence of penta-coordinated aluminium detected by 27Al NMR and a low bandgap measured by a UV–visible absorption spectroscopy.
Keywords:Amorphous aluminium oxide, Polysilane, Nanocomposite, Stabilization
Publication version:Version of Record
Year of publishing:2018
Number of pages:363-370
Numbering:499
PID:20.500.12556/RUNG-4011-764a0adc-91f4-2817-72b8-9d139fbd497c New window
COBISS.SI-ID:5179899 New window
DOI:10.1016/j.jnoncrysol.2018.07.055 New window
NUK URN:URN:SI:UNG:REP:KN6F86WO
Publication date in RUNG:30.07.2018
Views:4248
Downloads:16
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Record is a part of a journal

Title:Journal of Non-Crystalline Solids
Publisher:Elsevier
Year of publishing:2018
ISSN:0022-3093

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P2-0377, P1-0021

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:30.07.2018

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