- Synthesis of SnO2 Powders by Oxidation Heat Treatment of Nano-sized Sn Powders and Their Microstructural Characteristics
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Sung-Tag Oh, Sung-Il Lee, Yeon-Jun Joo
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J Korean Powder Metall Inst. 2007;14(5):287-291.
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DOI: https://doi.org/10.4150/KPMI.2007.14.5.287
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 Abstract
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- 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°C and exothermic peak at 560°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°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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