A Facile Route to the Synthesis of Hydroxyapatite/ Wollastonite Composite Powders by a Two-Step Coprecipitation Method

A facile and fast method has been developed to synthesize pure hydroxyapatite/wollastonite (HAp/WT) composite powders of different weight ratio. HAp/WT composites could be easily prepared by a two-step coprecipitation route and subsequent heating of the precipitant for 2 h, using Ca(OH) 2 and H 3 PO 4 as starting materials in the first step then adding Ca(NO 3 ) 2 .4H 2 O and Na 2 SiO 3 .9H 2 O in the second step. XRD, FT-IR and XRF analyses confirmed the synthesis of pure HAp/WT composite powders. SEM data showed that the synthetic composites have agglomerated particles consisting of small particles with size less than 1 μ m. The results indicates that this route for synthesis of HAp/WT composites is promising for medical applications such as bone repair substitutes and drug carriers.