Properties:
Molecular formula: ZnO
Molecular weight : 81.39
white /slight yellow fine powder , specific gravity 5.5－6.5 , granularity 0.15－0.7um ）, refractive index is 1.95 － 2.05 , specific heat in 20 ℃ 0.0915 ka. /g. ℃, melting point 1973 ℃, Zinc oxide evaporates in 1000 ℃ .
Molecular weight : 81.39
white /slight yellow fine powder , specific gravity 5.5－6.5 , granularity 0.15－0.7um ）, refractive index is 1.95 － 2.05 , specific heat in 20 ℃ 0.0915 ka. /g. ℃, melting point 1973 ℃, Zinc oxide evaporates in 1000 ℃ .
Standard: Company standard : HHXPQB － YHX(BLQ) － 2005
Technical index :
|
Item |
Value |
|
Appearance |
white powder |
|
Zinc oxide ( dry ) , % ≥ |
99.70 |
|
kali ( K ) , % ≤ |
0.0010 |
|
sodium oxide ( Na ) , % ≤ |
0.0010 |
|
ferric oxide ( Fe ) , % ≤ |
0.0020 |
|
cadmium oxide ( Cd ) , % ≤ |
0.0050 |
|
lead oxide ( Pb ) , % ≤ |
0.037 |
|
copper oxides ( Cu ) , % ≤ |
0.0002 |
|
Metal zinc ( Zn ) |
NA |
|
Moisture , % ≤ |
0.3 |
|
Insoluble matter in HCl , % ≤ |
0.006 |
|
Loss on ignition , % ≤ |
0.2 |
|
PH |
7.0-8.0 |
|
Average granularity μm , ≤ |
0.50 |
|
Residue on screen ( 44μm) , % ≤ |
0.10 |
lightning protector Zinc oxide is used in the making of ferrite
Packing, transportation and storage:
plastic bag or waterproof bag lined plastic woven bag , Net Wt. 50kg . size is : 580 × 1200mm .
It should ve protected by covers when transportation , avoid rain, moisture, or mixed with acidic matter .
packed in dry and airiness place, no contact with acid and alkali , In good condition, its valid period is an half year (the packing should be sealed), if expired, qualified product is still available .
It should ve protected by covers when transportation , avoid rain, moisture, or mixed with acidic matter .
packed in dry and airiness place, no contact with acid and alkali , In good condition, its valid period is an half year (the packing should be sealed), if expired, qualified product is still available .