| abstract |
Wherein the main component contains 26 to 46 mol% of iron oxide in terms of Fe 2 O 3 , 4 to 14 mol% of copper oxide in terms of CuO, 0 to 26 mol% of zinc oxide in terms of ZnO, Or more of nickel oxide. 0.8 to 10.0 parts by weight of a silicon compound in terms of SiO 2 as a subcomponent, 1.0 to 15.0 parts by weight in terms of Co 3 O 4 as a cobalt compound, 0.7 to 30.0 parts by weight in terms of Bi 2 O 3 as a bismuth compound . The value obtained by dividing the content of the cobalt compound in terms of Co 3 O 4 by the content of the silicon compound in terms of SiO 2 is 0.4 to 5.5. |