High-temperature stabilization of bulk amorphous Al [sub] 2O [sub] 3

Andraž Mavrič (Avtor), Mattia Fanetti (Avtor), Gregor Mali (Avtor), Matjaž Valant (Avtor)

Povzetek

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.

Ključne besede

amorphous aluminium oxide;polysilane;nanocomposite;stabilization;

Podatki

Jezik:	Angleški jezik
Leto izida:	2018
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UNG - Univerza v Novi Gorici
UDK:	54
COBISS:	5179899
ISSN:	0022-3093
Št. ogledov:	3595
Št. prenosov:	12
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

URN:	URN:SI:UNG
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 363-370
Zvezek:	ǂVol. ǂ499
Čas izdaje:	Nov. 2018
DOI:	10.1016/j.jnoncrysol.2018.07.055
ID:	10949691