VOLTAGE NONLINEAR RESISTIVE ELEMENT
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May 26, 2015
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Nov 29, 2012
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Abstract
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 Cu5Zr, Cu9Zr2, and Cu8Zr3. 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.
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