CONTROL OF THE SYNTHESIS OF α-TRICALCIUM ORTHOPHOSPHATE BY X-RAY DIFFRACTION AND SOLID-STATE ³¹P MAGIC ANGLE SPINNING NMR

Abstract

The effects of synthesis conditions on the quantitative preparation of α-tricalcium phosphate (α-TCP) by reactive sintering of hydroxyapatite-anhydrous dicalcium phosphate mixtures (HAP-DCPA), have been investigated. The following parameters of the synthesis were considered: Ca/P atomic ratio of the mixture, calcination temperature and time, and cooling rate. The yield and crystallinity of the final product have been estimated using X-ray diffraction (XRD) and solid-state ³¹P magic angle spinning NMR (MAS-NMR) techniques.