Abstract A voltage dependent resistor which has a zinc oxide sintered body which itself has voltage dependent properties. The resistor is made by the steps of: (1) providing a formed body of a powder mixture having, as a major part, zinc oxide and additive; (2) coating on the side surfaces of the formed body a paste having as the solid ingredient composition, at least one member selected from the group of (a) more than 50 mole % of silicon dioxide (SiO2), and less than 50 mole % of bismuth oxide (Bi2O3), (b) the same composition as that of said additive, (c) more than 30 mole % of antimony oxide (Sb2O3) and less than 70 mole % of bismuth oxide (Bi2O3), and (d) more than 50 mole % of indium oxide (In2O3) and less than 50 mole % of bismuth oxide (Bi2O3), (3) sintering the coated body; and (4) applying electrodes to opposite surfaces of the sintered body.
A VOLTAGE DEPENDENT RESISTOR COMPRISING A ZINC OXIDE SINTERED BODY ITSELF HAVING VOLTAGE DEPENDENT PROPERITIES, A COVERING LAYER ON THE SIDE SURFACE OF SAID BODY HAVING A THICKNESS OF MORE THAN 10U THE PORTION OF SAID COVERING LAYER UP TO A DEPTH OF 3U FROM THE SIDE SURFACE BEING COMPRISED OF
Claim 2
Dependent Claim
51 words
A VOLTAGE DEPENDENT RESISTOR COMPRISING A ZINC OXIDE SINTERED BODY ITSELF HAVING VOLTAGE DEPENDENT PROPERITIES, A COVERING LAYER ON THE SIDE SURFACE OF SAID BODY HAVING A THICKNESS OF MORE THAN 10U THE PORTION OF SAID COVERING LAYER UP TO A DEPTH OF 3U FROM THE SIDE SURFACE BEING COMPRISED OF
Claim 3
Dependent Claim
81 words
A voltage dependent resistor according to claim 1, in which said zinc oxide sintered body consists essentially of, as a major part, 99.9 to 80.0 mole percent of zinc oxide, and, as an additive, 0.05 to 10.0 mole percent of bismuth oxide (Bi2O3) and 0.05 to 10.0 mole percent, in total, of at least one member selected from the group consisting of cobalt oxide (CoO), manganese oxide (MnO), antimony oxide (Sb2O3), barium oxide (BaO), strontium oxide (SrO) and lead oxide (PbO).