Theobjective of this work has been the synthesis of wollastonite by solution combustion method.Thenovelty of this work has been\nobtaining the crystalline phase without the need of thermal treatments after the synthesis. For this purpose, urea was used as fuel.\nCalcium nitrate was selected as a source of calcium and colloidal silica served as a source of silicon. The effect of the amount of fuel\non the combustion process was investigated. Temperature of the combustion reaction was followed by digital pyrometry. The\nobtained products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and specific surface area.\nThe results showed that the combustion synthesis provides nanostructured powders characterized by a high surface area. When\nexcess of urea was used, wollastonite-2M was obtained with a submicronic structure.
Loading....