Abstract:
Fabrication and characterization of hydroxyapatite from Geloina coaxans and
H3PO4 as precursors have been done. The main of chemical composition from
Geloina coaxans shell was CaCO3, this material can be used as calcium source
on fabrication of hydroxyapatite. Calcium oxide was obtained by calcination
CaCO3 at 900oC for 12 hour. Synthesis of HAp was done with molar ratio of
precursor 1,67 and pH of solution was adjusted at 11 with different stirring times
(4 and 6) hours. Hydroxyapatite synthesized was characterized using XRD
instrument, and the result proved that HAp nanopowder can be obtained
successfully with stirring time for 4 hour with specific peak at 2θ = 31.7. Using
Schererr equation, particle size of HAp powder was 26.42 nm. FTIR analysis was
also done to determine functional group of HAp. The FTIR spectra of HAp
powder obtained show there were characteristics band exhibited in sample
spectra. Thermal analysis and particle size analysis were also investigated with
TG-DTA and PSA instruments respectively. Analysis morphology by SEM
revealed nearly uniform spherical morphology
