A. Clifford et al., The influence of calcium to phosphate ratio on the nucleation and crystallization of apatite glass-ceramics, J MAT S-M M, 12(5), 2001, pp. 461-469
Citations number
36
Categorie Soggetti
Multidisciplinary
Journal title
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
The nucleation and crystallization behavior of a series of glasses based on
4.5SiO(2)- 3Al(2)O(3)-YP2O5-3CaO-1.51CaF(2) was studied. The parameter Y w
as varied to give calcium to phosphate ratios between one and two. All of t
he glasses studied crystallized firstly to fluorapatite (Ca-5(PO4)(3)F). Th
e glass with a calcium to phosphate ratio of 1.67, corresponding to apatite
, bulk nucleated to give fluorapatite (FAP). The glasses with calcium : pho
sphate ratios either less than that of apatite, or greater than that of apa
tite all exhibited surface nucleation of FAP. However, following a nucleati
on hold of one hour at approximately 50 K above the glass transition temper
ature these glasses exhibited bulk nucleation of FAP. (C) 2001 Kluwer Acade
mic Publishers.