Abstract

CARDENAS, Davier Olarte; MORENO ALDANA, Luis Carlos  and  DELGADO MEJIA, Edgar. Synthesis of pure monetite by heterogeneous acid-base reaction. Rev.Colomb.Quim. [online]. 2017, vol.46, n.1, pp.60-68. ISSN 0120-2804.

Five variations of the monetite (M) synthesis were evaluated modifying the stirring, the phosphoric acid addition rate, the homogeneity and the drying temperature. Products were assessed by means of XRD, FTIR, SEM-EDS analysis and chemical assay of Ca/P (calcium by titration with potassium permanganate and phosphorus by colorimetric assessment of the molybdenum blue complex). X-ray diffraction, infrared spectroscopy and Ca/P ratio indicate that the synthesized phosphate corresponds to pure monetite. It was found that the most influential factors affecting grain composition, crystal size, shape and structure as well as Ca/P molar ratio of synthesized phosphates were stoichiometry and ballmilling mechanoactivation.

Keywords : monetite; brushite; DCPA; calcium phosphates; DCPD; hydroxyapatite; phosphates synthesis.

        · abstract in Spanish | Portuguese     · text in Spanish     · Spanish ( pdf )