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Title:High-temperature stabilization of bulk amorphous Al2O3
Authors:Mavrič, Andraž (Author)
Fanetti, Mattia (Author)
Mali, Gregor (Author)
Valant, Matjaž (Author)
Files:.pdf 05_JNon-CrystSolids_High-temperature_stabilization_of_bulk_amorphous_Al2O3.pdf (2,67 MB)
Work type:Not categorized (r6)
Tipology: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
Year of publishing:2018
Number of pages:363-370
COBISS_ID:5179899 Link is opened in a new window
DOI:10.1016/j.jnoncrysol.2018.07.055 Link is opened in a new window
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
Categories:Document is not linked to any category.
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Record is a part of a journal

Title:Journal of Non-Crystalline Solids
Year of publishing:2018

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Funding Programme:Cilnji raziskovalni programi
Project no.:P2-0377, P1-0021
Project ID:info:eu-repo/grantAgreement/ARRS/Cilnji%20raziskovalni%20programi/P2-0377%2C%20P1-0021