| 摘要 |
<p>PURPOSE:To obtain a voltage-current dependent nonlinear resistor, which has excellent characteristics and size of which is smaller than those of conventional devices, by inhibiting grain growth by the loading of an accessory constituent, making grain size small and increasing terminal voltage when 1mA currents flow. CONSTITUTION:Zinc oxide is used as a main component, and Bi, Co, Mn and Ni are contained respectively at 0.1-0.8mol%, 0.3-1.0mol%, 1.2-2.2mol% and 1.7-3.4mol% when they are converted into Bi2O3, Co2O3, MnO and NiO as accessory constituents. Al, B and Ag are included respectively at 0.001-0.05mol%, 0.001-1wt.% and 0.01-0.03wt.% when they are converted into Al, B2O3 and Ag2O as trace components. A resistor is baked at a temperature from 1000 deg.C to 1400 deg.C, the mean grains of Ag2O3 extends over 8mum or less, and terminal voltage at a time when 1mA currents are flowed is increased to 370V/mm or more. Accordingly, the voltage-current dependent nonlinear resistor, which has excellent characteristics and size of which is smaller than those of conventional devices, is acquired.</p> |
