Synthesis of HfO2 from hafnium hydroxide hydrate

Synthesis of HfO2 from hafnium hydroxide hydrate

A comprehensive study of processes taking place during synthesis and subsequent thermal treatment of hafnium oxide was performed. Synthesis of HfO2 involves following stages: stepwise dehydration of hydrated hafnium hydroxide, crystallization of metastable tetragonal phase of HfO2 and subsequent irr...

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Veröffentlicht in:Journal of alloys and compounds 2019-06, Vol.790, p.405-412
Hauptverfasser: Polovov, Ilya B., Bataev, Yakov S., Afonin, Yurii D., Volkovich, Vladimir A., Chukin, Andrey V., Rakhmatullin, Aydar, Boča, Miroslav
Format: Artikel
Sprache:eng
Schlagworte:
Ceramics
Chemical Sciences
Chemical synthesis
Crystallization
Dehydration
Hafnium
Hafnium oxide
Heat treatment
Material chemistry
Oxide materials
Synthesis
Transition metal compounds
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Zusammenfassung:A comprehensive study of processes taking place during synthesis and subsequent thermal treatment of hafnium oxide was performed. Synthesis of HfO2 involves following stages: stepwise dehydration of hydrated hafnium hydroxide, crystallization of metastable tetragonal phase of HfO2 and subsequent irreversible transition to the stable monoclinic modification. Preliminary heat treatment lowered temperature of crystallization of HfO2 and resulted in changing process mechanism. •Synthesis of HfO2 from hydrated hafnium hydroxide.•In situ combined DTA, DSC, XRD and IR investigation of HfO2 formation.•Effect of preliminary heat treatment on crystallization of HfO2 and its structure.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.03.103