Nurtono, Tantular
Abstract: Hydroxy apatite (HA) particles for biomaterial for implantation of bone tissues need homogen size and high crystallinity. Submicrometer, spherical, and monodispersed HA particles have been synthesized successfully by aerosol prosess in a flame reactor. A flame burner consisted of three concentric cylindrical pipes, each for starting material solution, LPG as fuel, and air as oxidizer. Ca(NO3)2.4H2O-(NH4)2HPO4 solution was selected as starting material. Temperature distribution and particle size evolution were predicted using computational fluid dynamics (CFD). The morphology and the crystallinity of the generated particles were analyzed using scanning electron microscope (SEM) and X-R Diffraction (XRD), respectively. The generated particles were highly affected by fuel flow rate, carrier gas flow rate and heat treatment after flame process. Their crystallinities increased with increasing the fuel flow rate and increased significantly by heat treatment of 800C for 2 hours after flame process.
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