1. Nano silver has big specific surface, so it has good catalyst active. 2. Nano silver particle and appearance Under TEM the size is : 20-30nm around 70% 30-40nm around 15% 40-50nm around 10% 50-60nm around 5% Nano silver particle is like a ball. 3. Nano silver specific surface 11.5945±0.1302m2/g。 4. Laser particle list: Use laser to test size, the conclusion is 5.6-82.3nm is 100% 5. Nano silver crystalling phase analysis The crystalling phase analysis conclusion is: 84% is cube, 16% is hexahedron , the size of cube nano silver is 145A0 6. Tap and loosen density Loose density 0.79g/cm3, tap density 2.14g/cm3 7.Chemical ingredient analysis Metal impurity less 0.05%。