Naslov
Thermal and structural studies of sol–gel derived yttria-doped ZrO2 nanoparticles: effect of annealing condition

Autori
Bačić, Ivana ; Mandić, Vilko ; Ćurković, Lidija ; Otmačić-Ćurković, Helena ; Kurajica, Stanislav

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

Izvornik
Book of Abstracts of the 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC3) / Rotaru, Andrei ; Cerc Korošec, Romana - Rostock : Academica Greifswald, 2015, 270-270

ISBN
978-84-606-9257-7

Skup
3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC3)

Mjesto i datum
Ljubljana, Slovenija, 25.08.2015. - 28.08.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
zirconia; yttria doping; sol-gel; annealing

Sažetak
Sol-gel derived zirconia, ZrO2 (stabilized by yttria in 5 mol %) nanocrystals (5YSZ) were annealed at different temperatures in different atmosphere conditions (air and vacuum) and investigated. Prepared samples were characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), Fourier- transform infrared spectroscopy (FT-IR) and micro-Raman spectroscopy. The results of DTA and XRD analysis show the zirconia crystallization onset at temperature no lower than 400 ºC. Average crystallite size of the 5YSZ annealed in air at 400, 600, 700 and 800 °C were calculated to be 10, 15, 22 and 33 nm, respectively. On the other hand, crystallite size remains in the range 4–13 nm when the heat treatment was conducted in vacuum. Annealing atmosphere affects crystallization, resulting in lower thermal treatment requirements and enabling controlled crystallite growth. XRD and micro-Raman spectroscopy showed nanocrystalline 5YSZ samples were successfully stabilized in the tetragonal phase and preserved phase stability over the investigated thermal treatment range.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA