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Item |
Quality |
||
ZnO/% ≥ |
99 |
97 |
95 |
XRD /nm  ≤ |
20 |
52 |
100 |
Grain nm≤ |
20 |
57 |
100 |
Surface proportion (m2/g)≥ |
62 |
65 |
75 |
Join index≤ |
50 |
60 |
100 |
Lead oxide( Pb )/%≤ |
0.0005 |
0.0005 |
0.0005 |
Manganese Oxide /% ≤ |
0.0001 |
0.0001 |
0.0001 |
105oc volatile substances %≤ |
0.30 |
0.4 |
0.5 |
Water dissoluble % ≤ |
0.10 |
0.41 |
0.5 |
Hydrochloric acid insoluble %≤ |
0.02 |
0.02 |
0.02 |
Burning decrement %≤ |
2 |
2 |
2 |
Refractive index |
1.9 |
1.9 |
1.9 |
colour |
Yellowish |
Yellowish |
White |