Functional Gradient Alumina Ceramics with Controlled Porosity


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The work deals with preparation of functional gradient alumina ceramics with controlled porosity by slip casting method of aqueous alumina suspension containing pore-generating agent. The sol-gel transition of AlO(OH) was employed to stabilize pore-generating agent in the suspension. The composite bodies with layers of variable porosity were prepared. Based on dilatometer measurement the admission difference of irreversible dilatation changes #αirr between compounded layers was determined in order to prepare defect free bi-layer bodies. The dependence of physical and mechanical properties of as fired composite bodies on the porosity value was expressed.



Edited by:

Marc Anglada et al.




J. Andertová et al., "Functional Gradient Alumina Ceramics with Controlled Porosity", Key Engineering Materials, Vol. 333, pp. 223-226, 2007

Online since:

March 2007




[1] R. Tláskal: PhD Thesis, (in Czech) ICT Prague (2005).

[2] J. Andertová, J. Havrda, and R. Tláskal: Characterization of Porous Solids VII (ed. P. L. Llewellyn, J. Reuquerol, F. Rodriges-Reinoso, N. A. Seaton), submitted Elsevier (2006).

[3] J. Andertová, R. Tláskal, J. Havrda, Proceeding of CHISA, (ed. J. Novosad), Prague 48 (2004).

[4] J. Andertová, R. Tláskal, M. Maryška, J. Havrda, submitted J. Eur. Ceram. Soc. (2001).

[5] J. Andertová, R. Tláskal, J. Havrda, I. Zedníková, Proceeding of Conference on Porous Ceramic Materials, VITO, Belgium (2005).