NJGC  Vol.3 No.1 , January 2013
Structural Changes by Thermal Treatment up to Glass Obtention of P2O5-Na2O-CaO-SiO2 Compounds with Bioglass Composition Types
Abstract: P2O5-Na2O-CaO-SiO2 compounds are the base of certain glass types. Glasses are solids obtained by fast cooling of melted mix of certain compounds. Different compositions give origin to many products with a variety of applications such as: bottles, coatings, windows, tools for chemical industry, laboratory equipment, optics, as bioceramics, etc. The aim of this work was to analyze structural changes of different composition in the P2O5-Na2O-CaO-SiO2 systems thermally treated up to 1250?C, that is to say, before glass formation, by X ray diffraction. Intermediate and final developed phases up to 1100?C thermal treatment in samples were generated as a function of Na2O/CaO (1 and 1.62) and P2O5/Na2O ratios (0, 0.2 and 0.245). High-and low-combeites, calcium and sodium-calcium silicate were found at the highest studied temperature.
Cite this paper: C. Volzone and F. Stábile, "Structural Changes by Thermal Treatment up to Glass Obtention of P2O5-Na2O-CaO-SiO2 Compounds with Bioglass Composition Types," New Journal of Glass and Ceramics, Vol. 3 No. 1, 2013, pp. 53-57. doi: 10.4236/njgc.2013.31009.

[1]   L. L. Hench, “Bioceramics: From Concept to Clinic,” Journal of American Ceramic Society, Vol. 74, No. 7, 1991, pp. 1487-1510. doi:10.1111/j.1151-2916.1991.tb07132.x

[2]   O. H. Anderson and K. H. Karlsson, “Calcium Phosphate Formation at the Surface of Bioactive in vivo,” Journal of Non-Crystalline Solids, Vol. 119, No. 3, 1990, pp. 290-296. doi:10.1016/0022-3093(90)90301-2

[3]   L. L. Hench and H. A. Paschall, “Direct Chemical Bond of Bioactive Glass-Ceramic Materials to Bone and Muscle,” Journal of Biomedical Materials Research, Vol. 7, No. 3, 1973, pp. 25-42. doi:10.1002/jbm.820070304

[4]   G. Piotrowski, L. L. Hench, W. C. Allen and G. L. Miller, “Mechanical Studies of Bone Bioglass Interfacial Bond,” Journal of Biomedical Materials Research, Vol. 9, No. 4, 1975, pp. 47-61. doi:10.1002/jbm.820090408

[5]   J. Wilson, F. J. Schoen, G. H. Pigott and L. L. Hench, “Toxicology and Biocompatibility of Bioglasses,” Journal of Biomedical Material Research, Vol. 15, No. 6, 1981, pp. 805-817. doi:10.1002/jbm.820150605

[6]   S. Agathopoulos, D. U. Tulyaganov, J. M. G. Ventura, S. Kannan, A. Saranti, M. A. Karakassides and J. M. F. Ferreira, “Structural Analysis and Devitrification of Glasses Based on the CaO-MgO-SiO2 System with B2O3, Na2O, CaF2 and P2O5 Additives,” Journal of Non-Crystalline Solids, Vol. 352, No. 4, 2006, pp. 322-328. doi:10.1016/j.jnoncrysol.2005.12.003

[7]   D. Williams, “An Introduction to Medical and Dental Materials. Concise Encyclopedia of Medical & Dental Materials,” 2nd Edtion, The MIT Press, Cambridge, 1990.

[8]   P. N. De Aza, A. H. De Aza, P. Pena and S. De Aza, “Bioactive Glasses and Glass-Ceramics,” Boletin de la Sociedad Espa?ola de Cerámica y Vidrio, Vol. 46, No. 2, 2007, pp. 45-55. doi:10.3989/cyv.2007.v46.i2.249

[9]   Joint Committee on Powder Diffraction Standards, JCPDS.

[10]   G. W. Brindley and G. Brown, “Crystal Structures of Minerals and Their X-Ray Identification. Mineralogical Society,” Mineralogical Society and the Royal Society, Melbourne, 1980.

[11]   R. C. Roth, T. Negas and L. Hook, “Phase Diagrams for Ceramists,” American Ceramic Society Inc., Westerville, 1975.

[12]   R. C. Mackenzie, “Differential Thermal Analysis,” Academic Press, New York, 1970.

[13]   D. C. Clupper and L. L. Hench, “Crystallization Kinetics of Tape Cast Bioactive Glass 45S5,” Journal Non-Crystalline Solid, Vol. 318, No. 1-2, 2003, pp. 43-48. doi:10.1016/S0022-3093(02)01857-4

[14]   W. Lu, W. Duan; Y. Guo and C. Ning, “Mechanical Properties and in Vitro Bioactivity of Ca5(PO4)2SiO4 Bioceramic” Journal of Biomaterials Applications, Vol. 26, No. 6, 2012, pp. 637-650. doi:10.1177/0885328210383599