Aqueous precipitation method for the formation of Mg-stabilized beta-tricalcium phosphate: An X-ray diffraction study

abstract

The preparation of magnesium (Mg)-stabilized beta-tricalcium phosphate [beta-TCP, beta-Ca-3(PO4)(2)] was carried out by an aqueous precipitation method and the characterization was performed by powder X-ray diffraction. The transformation of calcium-deficient apatite (def-apatite) into beta-TCP occurred in the range of 600-700 degrees C in the case of Mg substitution, whereas in the absence of Mg the transformation took place at higher temperatures (700-800 degrees C). The thermal stability of Mg-stabilized beta-TCP powders was observed until 1400 degrees C resulting in higher density values when compared to that of pure beta-TCP, which indicated thermal stability only till 1100 degrees C and comparably lower density values. Addition of Mg to the precursors Ca/P molar ratio = 1.5 resulted in the formation of small amounts of hydroxyapatite [HAP, Ca-10(PO4)(6)(OH)(2)]. The calculated values for lattice parameters confirm the stabilization role played by Mg. (c) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

keywords

SUBSTITUTED HYDROXYAPATITE; TRANSFORMATION; DISSOLUTION; CERAMICS; BEHAVIOR; APATITE; TCP

subject category

Materials Science

authors

Kannan, S; Ventura, JM; Ferreira, JMF

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".