Preparation of uniform colloidal particles of hafnium compounds
- 1 January 1991
- journal article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 1 (1) , 87-90
- https://doi.org/10.1039/jm9910100087
Abstract
Spherical colloidal particles of amorphous hafnium hydroxysulphate of narrow size distribution have been prepared by ageing at room temperature acidic solutions of hafnium oxychloride in the presence of metal sulphates. On calcination the powders crystallized into monoclinic hafnia, yet retained their spherical shape. The effects of several parameters (concentration of reagents, nature of the acid and the sulphate salt) on the characteristics of the precipitated particles were studied in detail. A mechanism for the formation of such particles is suggested.Keywords
This publication has 25 references indexed in Scilit:
- Infrared spectroscopic studies of the reactions of alcohols over group IVB metal oxide catalysts. Part 1.—Propan-2-ol over TiO2, ZrO2 and HfO2Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1989
- The selective formation of hydrocarbons from CO hydrogenation over oxide catalystsColloids and Surfaces, 1989
- Advanced CeramicsScientific American, 1986
- Production of Monodispersed Colloidal ParticlesAnnual Review of Materials Science, 1985
- Crack-size dependence of fracture toughness in transformation-toughened ceramicsJournal of Materials Science, 1984
- Sintering of new oxide ceramics using a high power cw CO2 laserApplied Physics Letters, 1984
- Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal OxidationJournal of the American Ceramic Society, 1982
- Structures, spectra and related properties of group IVB-doped vitreous silicaJournal of Non-Crystalline Solids, 1981
- Phase Relations and Thermal Expansion in the System HfO2‐TiO2Journal of the American Ceramic Society, 1976
- Some Properties of Hafnium Oxide, Hafnium Silicate, Calcium Hafnate, and Hafnium CarbideJournal of the American Ceramic Society, 1954