钙磷比对磷灰石微晶玻璃成核和结晶的影响。

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

作者信息

Clifford A, Hill R, Rafferty A, Mooney P, Wood D, Samuneva B, Matsuya S

机构信息

Department of Materials Science and Technology, University of Limerick, Limerick, Ireland.

出版信息

J Mater Sci Mater Med. 2001 May;12(5):461-9. doi: 10.1023/a:1011213406951.

DOI:10.1023/a:1011213406951

PMID:15348287

Abstract

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 (Ca5PO4)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.

摘要

研究了一系列基于4.5SiO₂-3Al₂O₃-YP₂O₅-3CaO-1.51CaF₂的玻璃的成核和结晶行为。改变参数Y以使钙磷比在1到2之间。所有研究的玻璃首先结晶为氟磷灰石（Ca₅PO₄)₃F）。钙磷比为1.67（对应于磷灰石）的玻璃整体成核生成氟磷灰石（FAP）。钙磷比小于或大于磷灰石的玻璃均表现出FAP的表面成核。然而，在比玻璃转变温度高约50K的温度下保持一小时的成核后，这些玻璃表现出FAP的整体成核。