Characterization of Freeze‐Dried Al2O3and Fe2O3
- 1 August 1970
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 53 (8) , 440-444
- https://doi.org/10.1111/j.1151-2916.1970.tb12673.x
Abstract
Oxide crystallite formation and growth from freeze‐dried sulfates were studied for the representative materials Al2O3and Fe2O3. Transmission and scanning electron micrographs showed the formation and growth of chainlike aggregates of crystallites. Aggregation occurred as part of the nucleation and growth of the oxide, and discrete oxide particles were never present. Orientation of the chain aggregates was related to the ice structure formed during freezing. X‐ray line broadening data showed that crystallite size is a function of the 1/5 to 1/7 power of time for isothermal treatments. A qualitative analysis of material transport favored the surface diffusion mechanism.Keywords
This publication has 1 reference indexed in Scilit:
- Crystal Growth During CalcinationPublished by MIT Press ,1959