Naslov
Microstructural analysis of sol-gel-derived boehmite nanoparticles

Autori
Štefanić, Goran ; Musić, Svetozar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Diffraction Analysis of the Microstucture of Materials / - , 2007

Skup
The 5th Size-Strain conference 'Diffraction Analysis of the Microstructure of Materials'

Mjesto i datum
Garmisch-Partenkirchen, Njemačka, 07.10.2007. - 09.10.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Al-oxides; powder diffraction; FE-SEM; sol-gel; line broadening analysis

Sažetak
Sol-gel processing from Al-alkoxides is important synthesis route in the preparation of nanosize Al-oxide particles. Many researches investigated the conditions of slow hydrolysis of Al-oxides (group name for Al-hydroxides, -oxyhydroxides and – oxides). In the present work we focused on the synthesis of nanosize boehmite particles using abrupt hydrolysis of Al-sec-butoxide and the influence of the experimental conditions on the properties of the particles synthesized. The obtained results show that processing parameters (pH, temperature and time of the synthesis) significantly influence structural and microstructural properties of the obtained boehmite products. The results of FE-SEM analysis indicate significant difference in the morphology of the obtained boehmites (plates, needles, granules). The results of line broadening analysis of the powder diffraction patterns (Le Bail method - program GSAS) indicate presence of very small anisotropic crystal domains (from 1 to 7 nm in direction 010 and from 2 to 16 nm in direction perpendicular to 010). In all cases parameters that contribute to the strain broadening of the diffraction lines decrease to nearly zero, which indicate that the obtained boehmites are almost strain free.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA