| 摘要 |
A voltage nonlinear resistive element 20 of the present invention includes a voltage nonlinear resistive material 30 composed of a copper alloy which has a two-phase structure containing a Cu phase 31 and a Cu-Zr compound phase 32 not containing a eutectic phase, and electrodes 21 and 22. The voltage nonlinear resistive material 30 may have a mosaic-shaped structure in which the Cu phase 31 and the Cu-Zr compound phase 32 are dispersed as crystals with a size of 10 µm or less in a cross-sectional view. The Cu-Zr compound phase 32 may be at least one of Cu 5 Zr, Cu 9 Zr 2 , and Cu 8 Zr 3 . Also, the voltage nonlinear resistive material 30 may be formed by spark plasma sintering of a Cu-Zr binary alloy powder. The voltage nonlinear resistive material 30 may contain 0.2 at% or more and 18.0 at% or less of Zr. |
