Preparation method for silver-zinc-oxide electric contact material containing additive

The invention discloses a preparation method for a silver-zinc-oxide electric contact material containing an additive. The preparation method comprises the following steps: (1) calculating the use amount of needed zinc oxide powder, silver powder and a salt compound containing additional elements according to the matching ratio of the silver-zinc-oxide electric contact material needing to be prepared, and weighing for later use; (2) taking the salt compound containing the additional elements to prepare an aqueous solution or an alcohol solution, adding the zinc oxide powder or silver powder, and mixing, thereby obtaining alloy powder slurry with uniform distribution of the salt compound containing the additional elements; (3) drying and crushing the obtained slurry, thereby obtaining alloy powder with uniform distribution of the salt compound containing the additional elements; (4) uniformly mixing the obtained alloy powder and the silver powder or the zinc oxide powder, and carrying out the procedures of iso