Naslov
THE INFLUENCE OF CALCINATION TEMPERATURE ON SOL-GEL DERIVED MULLITE

Autori
Mandić, Vilko ; Tkalčec, Emilija ; Kurajica, Stanislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
MATRIB 2011 Proceedings / Schauperl, Zdravko ; Šolić, Sanja - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2011, 290-296

ISBN
987-953-7040-20-8

Skup
MATRIB 2011

Mjesto i datum
Vela Luka, Hrvatska, 29.06.2011. - 01.07.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Mullite; calcination; sol-gel; XRD

Sažetak
Precursor powder of monophasic mullite (3Al2O3•2SiO2) was prepared by a sol-gel process using tetraethoxysilane (TEOS) and aluminium nitrate nonahydrate (Al(NO3)3*9H2O). Prepared gel was dried and grinded, the obtained powder was calcined at different temperatures ranging from 300 - 900 °C. Structure of amorphous gel has been examined using Fourier Transformed Infra Red (FTIR) spectroscopy. Spectra showed certain differences implying alterations of gel structure with calcination temperature. Thermal evolution of crystal phases was investigated by Differential Thermal and Thermo-gravimetric Analysis (DTA/TGA). It was observed that crystallization path of mullite is influenced by calcination temperature. Phases present after thermal treatment at 1000 °C were identified by X-ray diffraction (XRD). The samples reveal significant impact of calcination temperature on final sample composition, as well mullite composition. Maximal calcination temperature induces higher sample purity and mullite composition with reduced alumina content.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA