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柳道鉉(Do-Hyun You) 대한전기학회 2006 전기학회논문지C Vol.55 No.7
TiO₂-Nb₂O? sol was prepared using sol-gel method. Crystalline properties of gel powder changed from rutile phase to anatase phase with increasing Nb₂O? additives at 800℃, while they retained rutile phase regardless of Nb₂O? additives at 900℃, 1,000℃. They retained amorphous phase from 50℃ to 400℃, retained anatase phase from 500℃ to 600℃ and had rutile phase over 700℃ at 1mole% Nb₂O? additive. After TiO₂-Nb₂O? sol retained low viscosity with normal chain structure for a long time, its viscosity increased fast with network structure. DTA properties of gel powder had endothermic reaction due to evaporation of propanol and water about 78℃, had exothermic reaction due to propanol combustion about 290℃ and had exothermic reaction due to changing of TiO₂ phase about 640℃.