2nd International Nanotechnology Conference & Expo
April 3-5, 2017 Dubai, UAE
Effects of heat treatment temperature on the formation and stability of Na2Ca2Si3O9 crystalline phase: Advanced bioactive glass-ceramic for potential tissue engineering application
1Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Bangladesh
2Department of Glass and Ceramic Engineering, Bangladesh University of Engineering and Technology, Bangladesh
3Department of Biomedical Engineering, King Faisal University, Kingdom of Saudi Arabia
Recently, the SiO2-CaO-Na2O–P2O5 bioactive glass-ceramic system has shown high potential in tissue engineering applications due to its excellent biocompatibility, mechanical properties and remarkable bonding features with living tissues. This work focused on the synthesis of bioactive Na2Ca2Si3O9 crystalline phase along with amorphous phase by conventional solid-state reaction route. 50% SiO2, 23% CaO, 24% Na2O and 3% P2O5 powders were mixed and heat-treated under oxidizing environment at 800-1000°C for about 10 hours to attain the required structure. The X-ray diffraction (XRD) and Fourier transforms infrared spectroscopy (FTIR) were employed to investigate the effects of heat treatment temperature on the formation and stability of the Na2Ca2Si3O9 crystal phase. The resulting phase morphology was further examinedby the field emission scanning electron microscopy (FESEM). The XRD, FTIR and FESEM studies confirmed the formation of glassy phase above 950°C. However, it wasobserved that phosphorous rich silicorhenanite phase (Na2Ca4(PO4)2SiO4) decreased with increasing heat treatment temperature which might have great effect on bioactivity.
Keywords: Bioactive; Glass-ceramic; SiO2-CaO-Na2O–P2O5; Solid state reaction; Na2Ca2Si3O9 crystal