Kiran P, Ramakrishna V, Trebbin M, Udayashankar N K, Shashikala H D
Department of Physics, Crystal Growth Laboratory, National Institute of Technology Karnataka, Surathkal 575025, India.
Hamburg Center for Ultrafast Imaging (CUI), University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
J Adv Res. 2017 May;8(3):279-288. doi: 10.1016/j.jare.2017.02.001. Epub 2017 Feb 24.
In the present work, the effect of the CaO/PO ratio on the composition of sol-gel synthesized 58SiO-(19 - )PO-(23 + )CaO ( = 0, 5, 10 and 15 mol%) glass samples was studied. Further, the effect of NBO/BO ratio on hydroxy carbonated apatite layer (HCA) forming ability based on dissolution behavior in simulated body fluid (SBF) solution was also investigated. CaO/PO ratios of synthesized glass samples were 1.2, 2, 3.6, and 9.5, respectively. NBO/BO ratios were obtained using Raman spectroscopic analysis as 0.58, 1.20, 1.46, and 1.78, respectively. All samples were soaked in the SBF solution for 7 days. The calculated weight losses of these samples were 58%, 64%, 83%, and 89% for corresponding NBO/BO ratios. The increase in CaO/PO ratio increases the NBO/BO ratios. However, the increase in NBO/BO ratio increases HCA forming ability of SBF treated samples. The HCA crystalline layer formation was confirmed through X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Raman and Infrared spectroscopic analysis. Higher CaO/PO ratio favors the increase in HCA formation for SBF treated calcium phospho silicate glasses.
在本研究中，研究了CaO/PO比（=0、5、10和15mol%）对溶胶-凝胶法合成的58SiO-(19 - )PO-(23 + )CaO玻璃样品组成的影响。此外，还基于在模拟体液（SBF）溶液中的溶解行为，研究了非桥氧/桥氧（NBO/BO）比对羟基碳酸磷灰石层（HCA）形成能力的影响。合成玻璃样品的CaO/PO比分别为1.2、2、3.6和9.5。通过拉曼光谱分析得到的NBO/BO比分别为0.58、1.20、1.46和1.78。所有样品在SBF溶液中浸泡7天。对于相应的NBO/BO比，这些样品计算得到的重量损失分别为58%、64%、83%和89%。CaO/PO比的增加会提高NBO/BO比。然而，NBO/BO比的增加会提高经SBF处理样品的HCA形成能力。通过X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、拉曼光谱和红外光谱分析证实了HCA晶体层的形成。较高的CaO/PO比对经SBF处理的磷酸钙硅酸盐玻璃中HCA形成的增加有利。
