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Fabrication of Hydroxyapatite Ceramics via a Modified Slip Casting Route

The fabrication of dense phase-pure hydroxyapatite (HA) ceramics was investigated using a modified slip casting process. With the introduction of attritor milling into the process, the mean size of the HA powder was significantly reduced to 2 mum, resulting in a high relative 'green' density of 56 %, thereby giving a high sintered density of 98 % with mean grain size of around 0.6 mum at a sintering temperature of 1200 degreesC. Cell culture studies revealed that cells were growing and spreading well on these HA ceramics, indicating that no contamination was introduced during the fabrication process.