Abstract

Tika Permata Sari, Novesar Jamarun^*, Syukri, Zefri Azharman, Asregi Asril

DOI : http://dx.doi.org/10.13005/ojc/300440

In this work, hydroxyapatite was synthesized from limestone using the sol-gel method. Calcium carbonate (CaCO₃) and diammonium hydrogen phosphate ((NH₄)₂HPO₄) were  used as calcium and phosphate source. The hydroxyapatite was obtained by mixing the precursors at a variaty of temperature 50, 60, 70, 80 and 90°C. The resulting product were characterized by XRD and SEM-EDX. From the XRD data it can be seen that all of the product produced at different mixing temperature is a family hydroxyapatite. The compound prepared at 70°C showed smaller crystal size compared the one synthesized at 50 and 90°C. It also can be seen for SEM picture that the resulty material was agglomerated and spherical shape.

Hydroxyapatite; Temperature; Sol-Gel; Limestone

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