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KMID : 0385520080210020123
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Analytical Science & Technology
2008 Volume.21 No. 2 p.123 ~ p.128
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A study on the preparation and analysis of cordierite by sol-gel method
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Chun Kyung-Soo
Lee Young-Hwan
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Abstract
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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(OC₃H?)₄ solution was used in the sol-gel reaction. SiO₂ component was confirmed by infrared spectra showing 1045 ㎝?¹ and the stretching vibration of gelish SiO₄ showed 1140 ㎝?¹ and 940 ㎝?¹. The component of Al₂O₃ showed at 580 ㎝?¹ and network structure of Al₂O? showed at 680 ㎝?¹. The component of MgO was confirmed at 575 ㎝?¹ as the stretching vibration. X-ray diffraction analysis showed μ-cordierite crystal was showed up at temperature above 1000℃ at the mole ratio of cordierite precursor and water (1:5). μ-Cordierite and α-cordierite were coexisted at 1050℃ for the mole ratio of cordierite precursor and ammonia (1:5) while α-cordierite was only existed at 1100℃ for the same mole ratio as mentioned above.
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KEYWORD
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sol-gel method, cordierite, precursor, hydrolysis rates, metal alkoxide
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