A study on the preparation and analysis of cordierite by sol-gel method

The golden turbid solution of cordierite precursor was obtained by using magnesium ethoxide in sol-gel method, while the clear solution of cordierite precursor was obtained when 5%-Zr(OC3H7)(4) solution was used in the sol-gel reaction. SiO2 component was confirmed by infrared spectra showing 1045 cm(-1) and the stretching vibration of gelish SiO4 showed 1140 cm(-1) and 940 cm(-1). The component of Al2O3 showed at 580 cm(-1) and network structure of Al2O6 showed at 680 cm(-1). The component of MgO was confirmed at 575 cm(-1) as the stretching vibration. X-ray diffraction analysis showed mu-cordierite crystal was showed up at temperature above 1000 degrees C at the mole ratio of cordierite precursor and water (1: 5). mu-Cordierite and mu-cordierite were coexisted at 1050 degrees C for the mole ratio of cordierite precursor and ammonia (1: 5) while mu-cordierite was only existed at 1100 degrees C for the same mole ratio as mentioned above.