Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis of SnO2 Powders by Oxidation Heat Treatment of Nano-sized Sn Powders and Their Microstructural Characteristics

나노크기 Sn 분말의 산화열처리에 의한 SnO2분말의 합성 및 미세조직 특성

  • Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Technology) ;
  • Lee, Sung-Il (Department of Materials Science and Engineering, Seoul National University of Technology) ;
  • Joo, Yeon-Jun (NAMATECH Co., Ltd. Hanyang Business Incubator)
  • Published : 2007.10.28
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Abstract

Oxidation behavior and microstructural characteristics of nano-sized Sn powder were studied. DTA-TG analysis showed that the Sn powder exhibited an endothermic peak at $227^{\circ}C$ and exothermic peak at $560^{\circ}C$ with an increase in weight. Based on the phase diagram consideration of Sn-O system and XRD analysis, it was interpreted that the first peak was for the melting of Sn powder and the second peak resulted from the formation of $SnO_2$ phase. Microstructural observation revealed that the $SnO_2$ powder, heated to $1000^{\circ}C$ under air atmosphere, consisted of agglomerates with large particle size due to the melting of Sn powder during heat treatment. Finally, fine $SnO_2$ powders with an average size of 50nm can be fabricated by controlled heat treatment and ultrasonic milling process.

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