Ecology, Environment and Conservation Paper

SYNTHESIS OF CALCIUM PHOSPHATE BASED MARINE CORALS: A COMPARATIVE STUDY BETWEEN SOL-GEL AND PRECIPITATION METHOD

Siswanto, Retna Apsari and Aminatun

Abstract

Research on the effectiveness of calcium phosphate synthesis has been done using the precipitation method and the sol-gel method. The material used is marine coral from the South Coast of Java, namely Banyuwangi, East Java. Indonesia. The results showed that the synthesis of calcium phosphate using the sol-gel method requires a lower sintering temperature compared to the precipitation method. The optimal temperature which produces calcium phosphate is a stable phase of hydroxyapatite using the sol-gel method and precipitation respectively 550 oC and 900 oC. However, the precipitation method produces a greater percentage of hydroxyapatite phase compared to the sol-gel method. In addition, the precipitation method produces optimal calcium phosphate with a Ca/P ratio of 1.66, closer to theoretical calculations.