Voltage dependent resistor used zinc oxide is exclusively developed by our company for voltage dependent resistor and lightning arrester fields.
|
Item
|
Index
|
|
Zinc oxide(in dry basis)%≥
|
99.70
|
|
heavy metal(Zn)
|
no
|
|
lead oxide(Pb)%≤
|
0.0050
|
|
copper oxide(Cu)%≤
|
0.0002
|
|
manganic oxide(Mn)%≤
|
0.0001
|
|
potassium oxide(K)%≤
|
0.0010
|
|
sodium oxide(Na)%≤
|
0.0010
|
|
ferric oxide(Fe)%≤
|
0.0010
|
|
cadmium metal(Cd)%≤
|
0.0005
|
|
manganic %≤
|
0.005
|
|
loss on ignition %≤
|
0.2
|
|
water solubles%≤
|
0.05
|
|
moisture %≤
|
0.2
|
|
residue on sieve(45μm)%≤
|
0.05
|
|
PH
|
7.0~8.0
|
|
mean grain size(μm)≤
|
0.65
|
|
specific surface area㎡/g≥
|
4.0
|
|
tap densityg/ml≥
|
0.6
|
|
