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Journal of the Korean Ceramic Society 1994;31(3): 291. |
유기용매의 사용없이 알콕사이드로부터 코디어라이트 분말제조 |
류수착, 김호룡1, 김겸, 박희찬 |
부산대학교 무기재료공학과 1남해요업(주) |
Cordierite Powder Preparation from Alkoxides without Using Organic Solvents |
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ABSTRACT |
Cordierite powders were prepared by controlled hydrolysis of metal alkoxides with catalysts in water medium without using organic solvents. Water was adjusted to a certain pH by HC1 and NH4OH. $alpha$-Cordierite powder was prepared from aluminum isopropoxide, tetraethyl orthosilicate and magnesium ethoxide mixed with water adjusted to pH of 3. At water pH of 11, $alpha$-cordierite, mullite and $beta$-quartz phases were coexisted. The powders were freeze dried, calcined and then fired at different temperatures. The characteristics of powders were examined by means of DTA, X-ray diffraction, FT-IR, and electron microscopy. It was found that $alpha$-cordierite could be synthesized at temperature of 120$0^{circ}C$ from the powders prepared by alkoxides with water medium without organic solvents. |
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