Naslov
Phase development during the high-energy ball-milling of zinc oxide and iron - The mechanism of zinc ferrite formation

Autori
Štefanić, Ivka ; Krehula, Stjepko ; Musić, Svetozar ; Štefanić, Goran

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

Izvornik
Book of abstracts of the International Conference on the Applications of the Mossbauer Effect - ICAME 2013 / Musić, Svetozar ; Ristić, Mira ; Krehula, Stjepko ; Petrović, Željka - Zagreb : Institut Ruđer Bošković, 2013, 48-48

ISBN
978-953-6690-97-8

Skup
International Conference on the Applications of the Mossbauer Effect - ICAME 2013

Mjesto i datum
Opatija, Hrvatska, 01.09.2013. - 06.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ZnO; Fe; Zinc ferrite; High-energy ball-miling; FE-SEM; EDS; XRD; Mossbauer spectroscopy

Sažetak
High-energy ball-milling of the powder mixtures of zinc oxide and iron at different weight ratios was performed in air using the planetary ball mill with a stainless steel milling assembly. The milling time varied from 1 to 30 hours. For thermal stability study, the final milling products (30 hours) were subjected to temperature treatment at 500 °C and 1000 °C. Structural and microstructural changes during the ball-milling were monitored using X-ray powder diffraction (XRD), Mössbauer spectroscopy, field emission scanning electron microscopy (FE-SEM) and energy dispersive Xray spectrometry (EDS). The combined results of quantitative crystal phase analysis and Mössbauer spectroscopy indicated that the formation of zinc ferrite goes through a gradual oxidation and incorporation of iron ions into the zincite (ZnO) lattice. Iron oxidation goes in two steps, first from Fe^0 to Fe^2+ (appearance of the wüstite-type phase) and finally to Fe^3+ ions (formation of the zinc ferrite phase).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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