Study on Conversion Time of Brushite to Monetite via Hydrothermal Method

Abstract

The aim of this research is to identify the optimum conversion time of brushite to monetite. Obtaining optimum conversion time is important to reduce energy consumption and time for cost saving. The presence of distilled water in brushite powder with assistant of temperature and pressure for 45 min under hydrothermal treatment yielded to monetite. The constant temperature at 160 °C with 15, 30, 45 and 60 min for treatment times was used to execute the synthesis of monetite. The treatment times were extended until 2, 6 and 8 h to determine the transformation of phase. The XRD and SEM analysis were used for phase and morphology identifications. The XRD result at 45 min treatment time showed monetite peaks appeared greatly as compared to pure brushite. Whereas, the SEM results showed the existent of polygonal morphology that may referred to the monetite phase. The results obtained in this study conclude that at 45 min treatment time is the optimum conversion time from brushite to monetite