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    STUDIA CHEMIA - Issue no. 3 / 2011  
         
  Article:   SYNTHESIS AND CHARACTERIZATION OF STRONTIUM CONTAINING PHOSPHOSILICATE BIOGLASSES.

Authors:  ROZALIA VERES, CONSTANTIN CIUCE, VIORICA SIMON. 		 
       
         
  Abstract:  The structural properties of strontium containing silicophosphate glasses synthesized by sol-gel process were studied and compared with those of the strontium-free material. The samples were characterized by differential thermal analysis (DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and BET surface area analysis. Based on the DTA results, the 100 ºC dried gels were subjected to heat treatments at 300 ºC and 650 °C. X-ray diffractograms show a predominant amorphous character for all samples, even after the thermal treatments. The FT-IR analysis indicates weak changes in the local structure of Sr-free samples induced by progressive addition of SrO addition, as well as by increasing treatment temperature. The BET data reveal that the glasses are mesoporous.

Keywords: silicophosphate bioglasses; sol-gel; strontium; mesoporosity. 		 
         
     
         
         
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