Pregled bibliografske jedinice broj: 398402
Effect of Ti4+ ion incorporation on the phase development of ZrO2-type solid solutions obtained using low temperature sol-gel technique
Effect of Ti4+ ion incorporation on the phase development of ZrO2-type solid solutions obtained using low temperature sol-gel technique // The Eighteenth Croatian-Slovenian Crystallographic Meeting
Varaždin, Hrvatska, 2009. (predavanje, nije recenziran, sažetak, znanstveni)
CROSBI ID: 398402 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Effect of Ti4+ ion incorporation on the phase development of ZrO2-type solid solutions obtained using low temperature sol-gel technique
Autori
Štefanić, Goran ; Musić, Svetozar ; Ivanda, Mile
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Skup
The Eighteenth Croatian-Slovenian Crystallographic Meeting
Mjesto i datum
Varaždin, Hrvatska, 17.07.2009. - 21.07.2009
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
ZrO2; X-ray diffraction; Raman spectroscopy; Electron microscopy; DSC; FT-IR spectroscopy
Sažetak
Low temperature hydrolysis and polycondensation reaction of zirconium and titanium propoxide, given in different molar ratios, were used to obtain amorphous precursors of the ZrO2-TiO2 system at the ZrO2-rich side of the concentration range. In order to insure quantitative transition of Zr4+ and Ti4+ ions from liquid to solid phase, a small amount of ammonia was used as a catalyst. The obtained gels were washed, dried and calcinated at different temperatures up to 1100 °C. Structural and microstructural changes produced during the thermal treatment of the amorphous precursors were examined by differential scanning calorimetry, X-ray powder diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The Zr/Ti molar ratio in the obtained products was determined by energy-dispersive X-ray spectrometry. The results of phase analyses indicated that maximum solubility of Ti4+ ions in the ZrO2 lattice occurred in the metastable products obtained after crystallization of the amorphous precursors. Precise unit-cell parameters of the ZrO2-type solid solutions were determined by using the Le Bail method (program GSAS) of whole-powder-pattern refinements. Effect of TiO2 content on the crystallization temperature of the amorphous precursors and phase development of ZrO2-type solid solutions during the thermal treatment were compared with the previously obtained results for ZrO2-SnO2 system. Differences in the thermal behaviour of these two systems will be discussed.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Projekti:
098-0982904-2952 - Sinteza i mikrostruktura metalnih oksida i oksidnih stakala (Ristić, Mira, MZOS ) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb
