In vitro bioactivity and crystallization behavior of bioactive glass in the system SiO2-CaO-Al2O3-P2O5-Na2O-MgO-CaF2

被引:0
作者
Melek Erol
机构
[1] Istanbul Technical University,Department of Chemical Engineering, Chemical & Metallurgical Engineering Faculty
来源
Chemical Papers | 2010年 / 64卷
关键词
bioactive glass; crystallization kinetics; bioactivity; hardness; porosity;
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学科分类号
摘要
In this study, bioactivity of glass in the system SiO2-CaO-Al2O3-P2O5-Na2O-MgO-CaF2 was investigated. For this purpose, a glass sample was prepared by the traditional melting method. Crystallization behavior of bioactive glass was also investigated using differential thermal analyses. The Avrami constant of bioactive glass sample calculated according to the Ozawa equation was 3.72 ± 0.4, which indicates bulk crystallization. Using the Matusita-Sakka and the Kissinger equations, activation energy of crystal growth was determined as (394 ± 17) kJ mol−1 and (373 ± 12) kJ mol−1, respectively. These results indicate that the crystallization activation energy data of bioactive glass obtained in this study are accurate and reliable. Bioactivity of the resultant glass sample was analyzed by immersion in simulated body fluid. Scanning electron microscopy, thin film X-ray diffraction, ultraviolet spectroscopy and inductively coupled plasma techniques were used to monitor changes in the glass surface and the simulated body fluid composition. The results revealed that a hydroxyapatite layer was formed on the glass surface after 21 days of immersion in SBF. Formation of the hydroxyapatite layer confirmed the bioactivity of the glass in the system SiO2-CaO-Al2O3-P2O5-Na2O-MgO-CaF2. In addition, physical and mechanical properties of the sample were measured to determine changes in the properties with the immersion time. The results show that bioactive glass maintained its strength during the immersion in a simulated body fluid solution.
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页码:482 / 490
页数:8
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共 122 条
[1]  
Abel-Rahim M. A.(1992)Differential scanning calorimetric study of Bi Journal of Materials Science 27 4685-4689
[2]  
Ibrahim M. M.(2005)Se Biomaterials 26 2255-2264
[3]  
Dongol M.(2006)In Biomaterials 27 1832-1840
[4]  
Gaber A.(2009) chalcogenide glass Acta Biomaterialia 5 1211-1222
[5]  
Agathopoulos S.(2007)A new model formulation of the SiO Journal of the European Ceramic Society 27 1543-1546
[6]  
Tulyaganov D. U.(2006)-Al Ceramics International 32 515-520
[7]  
Valério P.(2003)O Journal of Non-Crystalline Solids 318 43-48
[8]  
Ferreira J. M. F.(2008)-B Applied Surface Science 255 391-395
[9]  
Agathopoulos S.(2000)O Powder Metallurgy and Metal Ceramics 39 381-394
[10]  
Tulyaganov D. U.(2008)-MgO-CaO-Na2O-F glass-ceramics Ceramics International 34 1667-1673