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금속염을 함침한 TiO₂ 소결체의 전기 비저항 - 온도 특성
홍필선(Hong Phil Sun),양천희(Cheon Hoi Yang) 대한공업교육학회 1985 대한공업교육학회지 Vol.10 No.1
Titanium oxide sintered in air at 1000℃ for 2 hours was impregnated with several kinds of metallic salts in aqueous solution. The electrical resistivity of sintered bodies was measured as a function of the temperature by electrical multimeter. When the resistivity of specimen doped antimony was measured in air during the heating, two step extrema was observed. The first extrema in the low temperature was explained in terms of the desorption of the chemisorbed oxygen and oxidation, and the second extrema in the high temperature was by the precipitation of Sb₂O₃. In case of specimen doped Aluminum, the extrema was not appeared but the thermal hysteresis was done. These phenomena were explained in terms of the principle of controlled valency.