Characterization of Calcium Powders from Merauke Mangrove Crab Shells

In this study, we report the successful fabrication of calcium powders by utilizing mangrove crab shells originating from Merauke as a natural source of bio-ceramic. Calcium powders from Merauke mangrove crab shells were synthesized at different temperatures varying from 800 to 1000 °C for 5 h in ambient atmosphere. It is observed that the calcinations temperature plays a significant role in the formation of hydroxyapatite crystallite phase. From the XRD and FTI characterization, it is confirmed that hydroxyapatite crystal was well synthesized at temperature of 1000 °C with no more carbon phase remains. SEM image also shows better crystalline shape having crystal size of ~ 800 nm. However, due to long period of air exposed, samples may be hydrated to Ca(OH)2.