The influence of calcium to phosphate ratio on the nucleation and crystallization of apatite glass-ceramics

被引：0
作者：
A. Clifford
R. Hill
A. Rafferty
P. Mooney
D. Wood
B. Samuneva
S. Matsuya
机构：
[1] University of Limerick,Department of Materials Science and Technology
[2] University of Leeds,Division of Restorative Dentistry, Leeds Dental Institute
[3] Higher Institute for Chemical Technology,Department of Dental Materials Engineering, Faculty of Dentistry
[4] Kyushu University,undefined
来源：
Journal of Materials Science: Materials in Medicine | 2001年 / 12卷
关键词：
Polymer; Calcium; Phosphate; Crystallization; SiO2;
D O I：
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学科分类号：
摘要：
The nucleation and crystallization behavior of a series of glasses based on 4.5SiO2- 3Al2O3-YP2O5-3CaO-1.51CaF2 was studied. The parameter Y was varied to give calcium to phosphate ratios between one and two. All of the glasses studied crystallized firstly to fluorapatite (Ca5(PO4)3F). The glass with a calcium to phosphate ratio of 1.67, corresponding to apatite, bulk nucleated to give fluorapatite (FAP). The glasses with calcium : phosphate ratios either less than that of apatite, or greater than that of apatite all exhibited surface nucleation of FAP. However, following a nucleation hold of one hour at approximately 50 K above the glass transition temperature these glasses exhibited bulk nucleation of FAP. © 2001 Kluwer Academic Publishers
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页码：461 / 469
页数：8
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