B. Boonchom
Aug 12, 2009
Citations
0
Influential Citations
32
Citations
Journal
Journal of Alloys and Compounds
Abstract
Abstract Calcium dihydrogenphosphate monohydrate (Ca(H 2 PO 4 ) 2 ·H 2 O) was prepared by a rapid and simple precipitation method using CaCO 3 and H 3 PO 4 in aqueous and acetone media at ambient temperature. The thermal transformation of the synthesized Ca(H 2 PO 4 ) 2 ·H 2 O at 500 °C was obtained to be CaP 2 O 6 occurred through the dehydration and the phosphate condensation reactions, as revealed by thermoanalytical techniques (TG/DTG/DTA). The synthesized Ca(H 2 PO 4 ) 2 ·H 2 O and its decomposition product CaP 2 O 6 were characterized by X-ray powder diffraction (XRD), Fourier transfer infrared (FTIR) spectroscopy and scanning electron microscope (SEM). Thermal behavior and the morphology of the synthesized Ca(H 2 PO 4 ) 2 ·H 2 O in aqueous and acetone media are compared with those of other works. The SEM micrograph of Ca(H 2 PO 4 ) 2 ·H 2 O show parallelogram-like microparticles containing small and large grain sizes. The aqueous and acetone media are proposed to play an important role in the synthetic process of calcium phosphates in exhibiting different physical properties, which are important for specific applications.