Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, 20500 Turku, Finland.
J Mater Sci Mater Med. 2013 Jun;24(6):1407-16. doi: 10.1007/s10856-013-4910-9. Epub 2013 Mar 20.
In this paper, we investigate the effect of SrO substitution for CaO in 50P₂O₅-10Na₂-(40-x)CaO-xSrO glass system (x from 0 to 40) on the thermal and structural properties and also on the glass reactivity in simulated body fluid (SBF) in order to find new glass candidates for biomedical glass fibers. The addition of SrO at the expense of CaO seems to restrain the leaching of phosphate ions in the solution limiting the reduction of the solution pH. We observed the formation of an apatite layer at the surface of the glasses when in contact with SBF. SrO and MgO were found in the apatite layer of the strontium ion-containing glasses, the concentration of which increases with an increase of SrO content. We think that it is the presence of MgO and SrO in the layer which limits the leaching of phosphate in the solution and thus the glass dissolution in SBF.
本文研究了 SrO 取代 50P₂O₅-10Na₂-(40-x)CaO-xSrO 玻璃系统（x 从 0 到 40）中 CaO 对热学、结构性能以及在模拟体液（SBF）中的玻璃反应性的影响，目的是寻找用于生物医学玻璃纤维的新型玻璃候选材料。用 SrO 取代 CaO 似乎可以抑制磷酸盐离子在溶液中的浸出，从而限制溶液 pH 值的降低。当玻璃与 SBF 接触时，我们观察到在玻璃表面形成了一层磷灰石。在含有 Sr 的玻璃的磷灰石层中发现了 SrO 和 MgO，其浓度随 SrO 含量的增加而增加。我们认为，正是层中存在 MgO 和 SrO 限制了溶液中磷酸盐的浸出，从而限制了玻璃在 SBF 中的溶解。
