Sol-gel glasses as precursors of bioactive glass ceramics

被引：130
|
作者：
Román, J [1 ]
Padilla, S [1 ]
Vallet-Regí, M [1 ]
机构：
[1] Univ Complutense Madrid, Fac Farm, Dept Quim Inorgan & Bioinorgan, E-28040 Madrid, Spain
来源：
CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 03期
关键词：
D O I：
10.1021/cm021325c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The aim of this work was to study the influence of the composition and thermal treatment on the in vitro bioactivity of glasses and glass ceramics obtained by the sol-gel method, to obtain bioactive glass ceramics in a simpler system than those at present. For this purpose, gels in the systems SiO2-CaO (70S: 70/30) and SiO2-CaO-P2O5 (55S: 55/41/4) were heated at temperatures ranging between 700 and 1400 degreesC. The samples were characterized by DTA/TG, XRD, FTIR, SEM, and EDS and an in vitro bioactivity study in SBF was carried out. The results showed that all materials obtained (glasses or glass ceramics) were bioactive. The bioactivity was influenced by the initial gel composition, by the thermal treatment, and by the different phases present in the glass ceramics. In glasses the bioactivity decreased with the stabilization temperature. In the glass ceramics the bioactivity was favored by the presence of pseudo-wollastonite (most soluble phase of CaSiO3) and of tricalcium. phosphate.
引用
收藏
页码：798 / 806
页数：9
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