| Title: | High-temperature stabilization of bulk amorphous Al2O3 |
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| 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) |
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| Files: |  05_JNon-CrystSolids_High-temperature_stabilization_of_bulk_amorphous_Al2O3.pdf (2,67 MB)
MD5: C9B9FE964AF359C66D01160B3F195C82
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| 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. |
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| Keywords: | Amorphous aluminium oxide, Polysilane, Nanocomposite, Stabilization |
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| Publication version: | Version of Record |
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| Year of publishing: | 2018 |
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| Number of pages: | 363-370 |
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| Numbering: | 499 |
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| PID: | 20.500.12556/RUNG-4011-764a0adc-91f4-2817-72b8-9d139fbd497c  |
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| COBISS.SI-ID: | 5179899 |
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| DOI: | 10.1016/j.jnoncrysol.2018.07.055 |
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| NUK URN: | URN:SI:UNG:REP:KN6F86WO |
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| Publication date in RUNG: | 30.07.2018 |
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| Views: | 5586 |
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| Downloads: | 24 |
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