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*'''Silver–zinc oxide (DODURIT ZnO) materials'''
Silver zinc oxide (DODURIT ZnO) contact materials with mostly 6 - 10 wt% oxide content including other small metal oxides are produced exclusively by powder metallurgy ''[[#figures1|(Figs. 2.120 – 2.12575)'' '']], (Table 2.28)''. Adding Ag<sub>2</sub>WO<sub>4</sub> in the process b) as described in the preceding chapter on Ag/SnO<sub>2</sub> has proven most effective for applications in AC relays, wiring devices, and appliance controls. Just like with the other Ag metal oxide materials, semi-finished materials in strip and wire form are used to manufacture contact tips and rivets. Because of their high resistance against welding and arc erosion Ag/ZnO materials present an economic alternative to Cd free Ag-tin oxide contact materials <xr id="tab:tab2.30"/> (Tab. 2.30) and <xr id="tab:tab2.31"/> (Tab. 2.31).
nicht gemacht!
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<xr id="fig:fig2.120"/> Fig. 2.120: Strain hardening of Ag/ZnO 92/8 PW25 by cold working
<xr id="fig:fig2.125"/> Fig. 2.125: Micro structure of Ag/ZnO 92/8 WPW25:a) perpendicular to extrusion direction
b) parallel to extrusion direction, 1) Ag/ZnO contact layer, 2) Ag backing layer
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