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    STUDIA CHEMIA - Issue no. 1 / 2015  
         
  Article:   MAGNESIUM INFLUENCE ON BIOACTIVITY OF SILICATE GLASSES PREPARED BY DIFFERENT SOL-GEL ROUTES.

Authors:  VIORICA SIMON.
 
       
         
  Abstract:   Xerogels of SiO2, SiO2-CaO, SiO2-MgO and SiO2-CaO-MgO compositions were prepared following the acid catalysed and quick alkali mediated sol-gel routes. The samples were characterized by X-ray diffraction, scanning electron microscopy and elemental composition energy-dispersive X-ray spectroscopy both before and after 8 days immersion in simulated body fluid. The results indicate that the calcite formation is favoured on calcium containing samples with up to 15 mol % MgO prepared by quick sol-gel route. Above this concentration magnesium inhibits the calcite formation and implicitly the expected bioactivity. 

Keywords: sol-gel, magnesium, bioactivity
 
         
     
         
         
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