BIOACTIVE silica was prepared by precipitation of the gel by …….acid from sodium silicate in the presence of ethylene glycol. The formed gel was homogeneously mixed with calcium carbonate powder. The produced solid was heated at 500oC for 3 hr and the calcined material was treated with dilute hydrochloric acid to remove the carbonate. The investigation by X-ray showed that the produced solid before treatment contains amorphous silica with crystalline calcium carbonate phase. The treatment with HCl removed the crystalline calcium carbonate leaving pure amorphous silica in nano-sized particles as confirmed by SEM. The bioactivity of the obtained silica was performed by soaking it in simulative body fluid (SBF) for two weeks followed by investigation using SEM, IR and EDX.
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