Microcellular Al2O3 ceramics from wood for filter applications

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Rambo CR, Andrade T, Fey T, Sieber H, Martinelli AE, Greil P
Zeitschrift: Journal of the American Ceramic Society
Verlag: Wiley-Blackwell
Jahr der Veröffentlichung: 2008
Band: 91
Seitenbereich: 852-859
ISSN: 0002-7820


Abstract


Microcellular biomorphous Al2O3 was produced by Al-vapor infiltration in pyrolyzed rattan and pine wood-derived biocarbon preforms. At 1600 degrees C the biocarbon preforms reacted with gaseous aluminum to form Al4C3. After oxidation in air at temperatures between 1550 degrees and 1650 degrees C, for 3 h, the biocarbon preforms were fully converted into alpha-Al2O3. Owing to the high anisotropy of biomorphous Al2O3, the compressive strength behavior was strongly dependent on the loading direction. The compressive strength of the specimens (0.1-11 MPa) is strongly dependent on their overall porosity and their behavior could be explained using the Gibson-Ashby model. The Darcian permeability (k(1)), as well as the non-Darcian permeability (k(2)), increased with an increase of the total porosity. The Darcian permeability of biomorphous Al2O3 was found to be in the range of 1-8 x 10(-9) m(2), which is in the order of magnitude of gas filters, and, therefore, suitable for several technological applications.



FAU-Autoren / FAU-Herausgeber

Fey, Tobias Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Greil, Peter Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)


Autor(en) der externen Einrichtung(en)
Federal University of Rio Grande do Norte / Universidade Federal do Rio Grande do Norte (UFRN)
Federal University of Santa Catarina / Universidade Federal de Santa Catarina (UFSC)


Zitierweisen

APA:
Rambo, C.R., Andrade, T., Fey, T., Sieber, H., Martinelli, A.E., & Greil, P. (2008). Microcellular Al2O3 ceramics from wood for filter applications. Journal of the American Ceramic Society, 91, 852-859. https://dx.doi.org/10.1111/j.1551-2916.2007.02223.x

MLA:
Rambo, Carlos Renato, et al. "Microcellular Al2O3 ceramics from wood for filter applications." Journal of the American Ceramic Society 91 (2008): 852-859.

BibTeX: 

Zuletzt aktualisiert 2018-11-08 um 02:44