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ZINC OXIDE VARISTOR AND METHOD FOR MANUFACTURING SAME

  • US 20190322588A1
  • Filed: 12/07/2017
  • Published: 10/24/2019
  • Est. Priority Date: 12/07/2016
  • Status: Active Grant
First Claim
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1. A zinc oxide varistor, comprising zinc oxide (ZnO) as a main component, one or more kinds of additives selected as a grain boundary forming component from a group including bismuth (Bi) and praseodymium (Pr), and one or more kinds of additives selected as a transition metal element from a group including cobalt (Co), manganese (Mn) and nickel (Ni);

  • wherein the zinc oxide has a crystallite size of 20 to 50 nm found by X-ray diffraction, grain diameter of 15 to 60 nm found using a specific surface area BET method, untamped density of 0.38 to 0.50 g/cm3, and tap density of 0.50 to 1.00 g/cm3.

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