Items | Standards | ||
1st Grade | 2nd Grade | ||
ZnO | ≥95-98% | ≥95-98% | |
SEM mean particle size/nm | ≤100 | ≤100 | |
XRD line width method average particle size/nm | ≤100 | ≤100 | |
Specific surface | ≥30(m2/g) | ≥40(m2/g) | |
Pb | ≤0.03% | ≤0.05% | |
Mn | ≤0.003% | ≤0.005% | |
Cu | ≤0.001% | ≤0.003% | |
Cd | ≤0.005% | -- | |
105 ° C volatiles | ≤0.5% | ≤0.7% | |
Water soluble matter | ≤0.1% | ≤0.7% | |
HCl Insolubles | ≤0.02% | ≤0.05% | |
Ignition Loss | ≤4% | ≤4% | |
Bulk Density | 0.35g/ml | 0.4g/ml |