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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

     
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