Abstract
Highly porous Al 2O 3 scaffolds were prepared from natural cellulosic sponges via pyrolysis and Al-vapour phase infiltration. Subsequent oxidation and sintering in air resulted in porous Al 2O 3 ceramics with an open cellular morphology and a total porosity of 95%. The Al 2O 3-sponges were immersed in highly supersaturated simulated body fluid (5 × SBF) solutions with different Mg 2+ and HCO 3− concentrations. After soaking of the porous Al 2O 3 sponges for 4 days a homogeneous calcium phosphate layer with a thickness of approximately 2 μm and a Ca : P ratio of 1.62 (apatite) was found.
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