Characteristics of SnO 2 prepared by preparation method with ammonium nitrate

초록

SnO <inf>2</inf> powders were prepared from the calcination of stannic acids precipitated from the aqueous solution of SnCl <inf>4</inf> with ammonium nitrate as a precipitator at 90 °C. For the comparison of properties, the stannic acids were prepared from the homogeneous precipitation method using urea as a precipitator at the same temperature. The stannic acid from ammonium nitrate at a thermal gravity analysis showed the weight loss until 700 °C and the percentage of total weight loss was 16.5%. The crystallization of stannic acid into SnO <inf>2</inf> finished in the calcination at 600 °C for 2 h. The crystallite size of SnO <inf>2</inf> increased with the increase of calcination temperature and initial concentration of SnCl <inf>4</inf> solution. In case of the same calcination condition, SnO <inf>2</inf> prepared from homogeneous precipitation using urea had a relatively smaller crystallite size rather than SnO <inf>2</inf> prepared from ammonium nitrate.

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