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Voltage dependent resistor used zinc oxide

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