Abstract
Hydroxyapatite (Ca 10(PO 46(OH) 2) ceramic bars have been prepared by injection moulding. In this process, calcination treatment was used to reduce the fine fraction of the starting hydroxyapatite powder to improve the packing density and the flowability behaviour. The effect of different calcination temperatures on the powder characteristics, shaping by injection and sintering was investigated. The results show that a higher calcination temperature is beneficial for shaping but delays the sintering. The optimum calcination temperature obtained in this study is 900 °C and that for 50 v o solid loading feedstock, 43 MPa of 4-point bending strength and a Weibull modulus of 10.62 are obtained.
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