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