Pregled bibliografske jedinice broj: 186386
The crystallization of HfO2 and ZrO2 under hydrothermal conditions
The crystallization of HfO2 and ZrO2 under hydrothermal conditions // Journal of alloys and compounds, 387 (2005), 1-2; 300-307 doi:10.1016/j.jallcom.2004.06.064 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 186386 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
The crystallization of HfO2 and ZrO2 under hydrothermal conditions
Autori
Štefanić, Goran ; Musić, Svetozar ; Molčanov, Krešimir
Izvornik
Journal of alloys and compounds (0925-8388) 387
(2005), 1-2;
300-307
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
hydrothermal crystallization ; HfO2 ; ZrO2 ; XRD ; Metastable phase
Sažetak
Hydrothermal crystallization of hydrous hafnia at 90 and 120 oC, was monitored at pH 3, 7, 9.5 and 13, using X-ray powder diffraction analyses. The obtained results showed that hydrothermal crystallization proceeded much more slowely in a neutral pH medium than in an acidic or alkaline medium. Phase analysis of the products of hydrothermal treatment showed that, regardless of pH, hydrous hafnia crystallized into m-HfO2. Stabilization of metastable cubic or tetragonal HfO2 occured upon adding a sufficient amount of stabilizing Na+ ions. Similarities and differences between the hydrothermal crystallization of HfO2 and the hydrothermal crystallization reported for ZrO2 were discussed. It was concluded that in both cases hydrothermal crystallization proceeds via a dissolution/precipitation mechanism in the whole pH range.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
