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침전법에 의한 SnO2 분말의 제조
Preparation of SnO2 Powders by the Precipitation Method
HWAHAK KONGHAK, August 1997, 35(4), 457-462(6), NONE
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Abstract
SnCl4·5H2O의 수용액으로부터 침전법에 의해 주석산 침전을 제조해 이것을 열처리함으로 SnO2 분말을 제조하였다. 이 과정 중 열처리 온도 및 침전물의 pH변화가 분말의 특성에 미치는 영향을 조사하였다. 주석산 침전은 하소온도 증가에 따라 흡착수 및 구조수가 방출되어 비표면적이 감소하였으며, 600℃ 부근의 온도에서 결정화가 일어나 대단히 미세한 0.04-0.05μm 크기의 SnO2 분말이 형성되었다. 반면에 pH 4-12의 범위에서 침전물의 pH변화는 SnO2 분말의 비표면적 및 입자크기에 큰 영향을 주지 못했다.
SnO2 powder was prepared by calcination of the stannic acid precipitated from SnCl4·5H2O aqueous solution by the precipitation method. The effects of calcination temperature and precipitation pH were investigated on the properties of SnO2 powder. The stannic acid showed the decrease of specific surface area due to the release of absorbed water and structural water with the increase of calcination temperature and was crystallized to SnO2 powders at 600℃, which were composed of very fine particles with 0.04-0.05 μm in diameter. On the other hand, the variation of precipitation pH in 4-12 pH range did not show a big difference in the specific surface area and particle size of SnO2 powders.
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Iin PL, Pelton AD, Bale CW, J. Am. Ceram. Soc. Bull., 66(2), 221 (1981)
Kaneko S, Kanamori J, Imoto F, 일본화학회지, 6, 906 (1976)
Son YM, Kwon HB, Roberts EW, J. Electrochem. Soc., 138(7), 2185 (1991)
Xu C, Tamaki J, Miura N, Yamazoe M, Sens. Actuators B-Chem., 3, 147 (1991)
Kittaka S, Morishige K, Fujimoto T, J. Colloid Interface Sci., 72(2), 191 (1979)
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