Supercritical Debinding of Injection Molded Ceramics

Supercritical Debinding of Injection Molded Ceramics

Extraction of organic additives from extrusion‐molded cylinders of alumina by a supercritical fluid is investigated. Hildebrand parameters alone are not adequate to predict conditions for optimal polymer extraction with supercritical CO2. The results obtained with two models developed for the kineti...

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Veröffentlicht in:Journal of the American Ceramic Society 1995-07, Vol.78 (7), p.1787-1792
Hauptverfasser: Chartier, Thierry, Ferrato, Marc, Baumard, Jean F.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
General studies
Technical ceramics
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Zusammenfassung:Extraction of organic additives from extrusion‐molded cylinders of alumina by a supercritical fluid is investigated. Hildebrand parameters alone are not adequate to predict conditions for optimal polymer extraction with supercritical CO2. The results obtained with two models developed for the kinetics of binder extraction suggest that polymer extraction from green samples is controlled by diffusion without development of a reaction front. The solubility and diffusivity of polymers both affect the extraction rate, with opposite pressure and temperature dependencies.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1995.tb08890.x