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January 26th, 2010

The Effect of Polyvinyl Alcohol on the Microstructure and Permeability of Freeze-Cast Alumina

Published on January 26th, 2010 | By: pwray@ceramics.org

Volume 93 Issue 1, Pages 115 – 120


Christopher Peko, Ben Groth, Ian Nettleship
Published Online: Nov 11 2009 2:41PM
DOI: 10.1111/j.1551-2916.2009.03398.x


Content, content, content

This study examined the effect of polyvinyl alcohol (PVA) on the microstructure and permeability of freeze-cast porous alumina. The PVA addition was shown to have a significant effect on the pore size, with the trends in microstructure morphology and scale being qualitatively consistent with the effects of PVA addition on constitutional supercooling. The measured Darcian permeabilities were between 10-10 m2 and 10-12 m2. The permeability decreased as the PVA content increased and a significant fraction of the flow could be attributed to inertial effects.


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