Synthesis and thermal stability of sodium, magnesium co-substituted hydroxyapatites

abstract

Sodium and magnesium co-substituted hydroxyapatite (Hap) and beta-tricalcium phosphate mixtures were prepared through an aqueous precipitation method. Characterization results from XRD, FT-IR and thermal analysis have indicated the influence of additives (Na and Mg) on the thermal stability of the apatites. The elemental analyses have also confirmed the presence of Na+ and Mg2+ ions in the apatite structure. Calculated lattice parameters for the combined substitution of elements on the apatite structure were found to have contraction of the a-axis and expansion of the c-axis as well as of the unit cell volume with respect to that of pure Hap.

keywords

CALCIUM-PHOSPHATE CERAMICS; BETA-TRICALCIUM PHOSPHATE; CHEMICAL-CHARACTERIZATION; DEFICIENT HYDROXYAPATITE; APATITES; TEMPERATURE; POWDERS; RATIO; TCP

subject category

Chemistry; Materials Science

authors

Kannan, S; Rocha, JHG; Ferreira, JMF

our authors

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