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PREPARATION OF ALUMINA FIBERS FROM ALUMINUM SALTS BY THE SOL-GEL METHOD
Korean Journal of Chemical Engineering, January 1999, 16(1), 75-81(7), 10.1007/BF02699008
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Abstract
Alumina fibers were synthesized from two different systems, AlCl3-Al powder-H2O and Al(NO3)3-Al powder-H2O, by the sol-gel method. For the former system, gel fibers were obtained from solutions in a composition range of Al powder/AlCl3 molar ratios of 2 to 5. For the latter system, the spinnable range was narrower compared to the aluminum chloride system. The thermogravimetry analysis (TGA) curve of the aluminum chloride system showed a weight loss up to 700℃, while the TGA curve of the aluminum nictate system showed no weight loss above 400℃, which indicates that thermal decomposition of Cl- is more difficult than that of NO3-.
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Sacks MD, Tseng TY, Lee SY, Ceram. Bull., 63, 301 (1984)
Song KC, Chung IJ, J. Non-Cryst. Solids, 107, 193 (1989)
Song KC, Chung IJ, J. Non-Cryst. Solids, 108, 37 (1989)
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Yogo T, Iwahara H, J. Mater. Sci., 27, 1499 (1992)
