... in ranges of 20~1000nm at your requirement. Usages metallic nano cobalt powder Fe,Cu,Ni,Zn,Ag,Sn,Bi,CoAppearance: Different ... particle size 20 to 300 nm different specifications of nano or super fine cobalt powder, also can do special processing according to user ... requirements. metallic nano cobalt powder Fe,Cu,Ni,Zn,Ag,Sn,Bi ...