Supercritical fluid technologies for ceramic-processing applications
- Chemical Methods and Separations Group, Chemical Sciences Dept., Battelle Pacific Northwest Lab., Richland, WA (US)
This paper reports on the applications of supercritical fluid technologies for ceramic processing. The physical and chemical properties of these densified gases are summarized and related to their use as solvents and processing media. Several areas are identified in which specific ceramic processes benefit from the unique properties of supercritical fluids. The rapid expansion of supercritical fluid solutions provides a technique for producing fine uniform powders and thin films of widely varying materials. Supercritical drying technologies allow the formation of highly porous aerogel products with potentially wide application. Hydrothermal processes leading to the formation of large single crystals and microcrystalline powders can also be extended into the supercritical regime of water. Additional applications and potential applications are identified in the areas of extraction of binders and other additives from ceramic compacts, densification of porous ceramics, the formation of powders in supercritical micro-emulsions, and in preceramic polymer processing.
- OSTI ID:
- 6170878
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 72:6; ISSN 0002-7820; ISSN JACTA
- Country of Publication:
- United States
- Language:
- English
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CERAMICS
CHEMICAL PROPERTIES
COLLOIDS
CRYSTALS
DISPERSIONS
DRYING
EMULSIONS
EXTRACTION
FABRICATION
MICROEMULSIONS
MONOCRYSTALS
PHYSICAL PROPERTIES
POLYMERS
POWDERS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SUPERCRITICAL GAS EXTRACTION
SUPERCRITICAL STATE
TECHNOLOGY ASSESSMENT