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Simón Yobanny Reyes López,Rosa Saucedo Acuña,Rigoberto López-Juárez,Juan Serrato Rodríguez 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.5
A new simplified route to prepare crystalline α-alumina powders is proposed from the decomposition of aluminum formate Al(O2CH)3 precursor following a process of gelation of Al(O2CH)3 in an aqueous medium. Heat treated powders were characterized by XRD, Raman and infrared spectroscopy showing the presence of η-Al2O3 at 1000 o C and the transformation to α-Al2O3 at 1100 o C, where SEM images of α-Al2O3 reveled an size of 1-2 μm by the aggregated particles, and TEM images confirm a particles size of 200-300 nm. By other hand BET study showed that the specific surface area of η-Al2O3 and the α- Al2O3 obtained is higher than the specific surface area reported for these materials (until 118 m2 /g), ratify that this new route process at low temperature promote to obtain the powers with an excellent superficial area.