| 摘要 |
PURPOSE:To improve the voltage non-linearity of the title resistor by a method wherein zinc oxide is used as a main component, and at least lead monoxide is added beside praseodymium oxide as an auxiliary component, and the mixed raw material is sintered. CONSTITUTION:The material formed by adding Pr6O11, Co3O4, K2O, Cr2O2, MgO, CaO, Al2O3 and B2O3 of 0.5, 2.0, 0.1, 0.1, 0.1, 0.01mol% respectively to ZnO is used as the fundamental composition, and moreover, PbO is added in the range of 0.3 to 200 mol ppm. The above-mentioned material is thoroughly mixed, pulverized, brought into a slurry state, and after it has been granulated by compounding a binder (caking agent), it is molded into disc shape. Then, the molded material is sintered in the air, Ag conductive paste is screen printed on both surfaces of the sintered body, and then it is calcined. To be more precise, ZnO is used as a main component, PbO of 3 to 100mol ppm is added to the material containing Pr and other metal oxide as an auxiliary component, and they are mixed and sintered. As a result, the change of characteristics in a low current region caused by application of voltage can be reduced, and the voltage non-linearity of the title resistor can be improved. |
