| abstract |
The invention relates to the technical field of voltage-sensitive resistance cards for lightning arresters, in particular to a zinc oxide resistance card and a preparation method and application thereof. The invention provides a zinc oxide resistance card which comprises the following raw materials in percentage by mole: 85-95% of ZnO and 0.01-4.0% of Bi 2 O 3 ，0.01‑4.0％Sb 2 O 3 ，0.05‑3.0％Co 2 O 3 ，0.01‑2.0％MnO 2 ，0.01‑3.0％NiO，0.01‑2.0％Fe 2 O 3 ，0.01‑2.0％A1 2 O 3 ，0.01‑2.0％Dy 2 O 3 . The zinc oxide resistance card provided by the invention does not need to add toxic substance Cr 2 O 3 By ZnO or Bi 2 O 3 、Sb 2 O 3 、Co 2 O 3 、MnO 2 、NiO、Fe 2 O 3 、A1 2 O 3 And Dy 2 O 3 The zinc oxide resistance card has the advantages of high potential gradient, high square wave current capacity, low residual voltage, high square wave current and large current impact resistance, good aging resistance and the like due to the mutual matching of various components. |