Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Formation Mechanism of SnO Plate

판상 SnO의 형성 메커니즘

  • Kim, Byeung Ryeul (Department of Metallurgical Engineering, Dong-A University) ;
  • Park, Chae Min (Department of Metallurgical Engineering, Dong-A University) ;
  • Lee, Woo Jin (Department of Metallurgical Engineering, Dong-A University) ;
  • Kim, Insoo (Department of Metallurgical Engineering, Dong-A University)
  • Received : 2010.07.07
  • Published : 2010.12.25
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Abstract

This study elucidates the formation mechanism of SnO plate observed during the precipitation reaction of a $SnCl_2$ aqueous solution. $Sn_{21}Cl_{16}(OH)_{14}O_6$ and $Sn_6O_4(OH)_4$ precipitates was formed at pH=3~5 and at pH=11, respectively. When the pH was in the range of 11.5~12.5, the $Sn_6O_4(OH)_4$ precipitates dissolved into $HSnO_2{^-}[Sn_6O_4(OH)_4+4OH^-={6HSnO_2{^-}+2H^+]$ and dissolved $HSnO_2{^-}$ ions reprecipitated to SnO plate $[HSnO_2{^-}+H^+=SnO+H_2O]$. The $Sn_6O_4(OH)_4$ precipitates completely transformed into SnO plate through a repeated process of dissolution-precipitation in the range of pH=11.5~12.5.

Keywords

Acknowledgement

Supported by : 신소형재가공청정공정개발연구센터

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