Particulate tin power and manufacturing method thereof

Abstract

The present invention relates to particulate tin powder and a manufacturing method thereof. More particularly, the present invention relates to a method of manufacturing particulate tin powder including i) preparing tin salt solution, ii) adding chelating agents to the tin salt solution, iii) adjusting pH of the tin salt solution to which the chelating agents are added, and iv) reductively depositing tin powder by adding reductant to the tin salt solution.

1 . A method of manufacturing particulate tin powder, comprising:
 i) preparing tin salt solution;   ii) adding chelating agents to the tin salt solution;   iii) adjusting pH of the tin salt solution to which the chelating agents are added; and   iv) reductively depositing tin powder by adding reductant to the tin salt solution.   
     
     
         2 . The method of manufacturing particulate tin powder of  claim 1 , wherein the concentration of the tin salt solution is 0.01 to 5 mol/L. 
     
     
         3 . The method of manufacturing particulate tin powder of  claim 1 , wherein the tin salt solution is composed of SnCl 2 , SnSO 4 , SnI 2 , SnF 2  SnBr 2 , Na 2 SnO 3 , or SnCH 3 SO 3  solution. 
     
     
         4 . The method of manufacturing particulate tin powder of  claim 1 , wherein the concentration of the chelating agents is 0.05 to 15 mol/L. 
     
     
         5 . The method of manufacturing particulate tin powder of  claim 1 , wherein the chelating agents are composed of nitrogen (N) or oxygen (O) containing compound. 
     
     
         6 . The method of manufacturing particulate tin powder of  claim 1 , wherein the chelating agents are composed of thiourea or thiourea derivatives. 
     
     
         7 . The method of manufacturing particulate tin powder of  claim 1 , wherein the reductant is composed of boron (B), phosphorus (P), or nitrogen (N) containing compound. 
     
     
         8 . The method of manufacturing particulate tin powder of  claim 1 , wherein the reductant is composed of sulfide, disulfide, or thiol. 
     
     
         9 . Particulate tin power manufactured by reductive deposition in a manufacturing method disclosed in  claims 1  to  8 . 
     
     
         10 . The particulate tin powder of  claim 9 , wherein the purity of the tin powder is equal to or larger than 95%. 
     
     
         11 . The particulate tin powder of  claim 9 , wherein a mean particle size (Dv50) of the tin powder is equal to or smaller than 1 μm. 
     
     
         12 . The particulate tin powder of  claim 9 , wherein the particle size distribution of the tin powder is 0.1 to 5 μm.