Synthesis of ultrafine refractory oxides zirconia-hafnia-yttria by sol-gel technology

Synthesis of ultrafine refractory oxides zirconia-hafnia-yttria by sol-gel technology

A transparent gel was prepared using a hydrolytically active solution of zirconium, hafnium, and yttrium alkoxoacetylacetonates. This gel served to synthesize ultrafine zirconia-hafnia-yttria complex oxide. The product dispersity was studied as affected by the parameters of xerogel heat treatment. T...

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Veröffentlicht in:Russian journal of inorganic chemistry 2012-03, Vol.57 (3), p.307-312
Hauptverfasser: Sevast’yanov, V. G., Simonenko, E. P., Simonenko, N. P., Kuznetsov, N. T.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Chemistry and Materials Science
Crystallites
Inorganic Chemistry
Lasers
Mathematical analysis
Oxides
Synthesis and Properties of Inorganic Compounds
Transmission electron microscopy
Xerogels
Yttrium
Zirconium
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Zusammenfassung:A transparent gel was prepared using a hydrolytically active solution of zirconium, hafnium, and yttrium alkoxoacetylacetonates. This gel served to synthesize ultrafine zirconia-hafnia-yttria complex oxide. The product dispersity was studied as affected by the parameters of xerogel heat treatment. The thermal behavior of the xerogel was studied by DSC-TGA. Elemental analysis (laser mass spectrometry) and phase analysis of the synthesized materials were carried out. Average crystallite sizes were calculated by the Scherrer relationship. The particle morphology was studied by TEM. Specific surface areas were determined. Sintering of ultrafine oxide powders was studied at 1000, 1200, and 1400°C.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023612030278