The Role of Hydrothermal Time in Determining the Phase Purity and Compressive Strength of Biogenic Hydroxyapatite from Meretrix meretrix Clam Shell
DOI:
https://doi.org/10.35895/rf.v6i2.90Kata Kunci:
Hydroxyapatite, Hydrothermal time, Purity, Compressive strength, Clam shellAbstrak
Biogenic hydroxyapatite (HA) often contains calcium hydroxide [Ca(OH)₂] as a residual unreacted phase. This study investigates the effect of synthesis duration on the phase purity and compressive strength of HA. HA was synthesized from Meretrix meretrix clam shell (MCS) via a hydrothermal method with reaction times of 15, 18, and 21 hours. Phase composition and purity of HA were characterized using X-ray diffraction (XRD). The results showed that at the 21-hour reaction time, the HA phase purity reached 98.85 %, while the residual Ca(OH)₂ content was 1.15 %. Mechanical properties were evaluated using a Universal Testing Machine (UTM), showing that the compressive strength of HA increased with longer synthesis durations. These findings demonstrate that optimizing hydrothermal synthesis time effectively enhances phase purity and compressive strength of HA, while also highlighting the potential of MCS as a sustainable and high-value biogenic source.
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