研究了热处理条件对不同方法制备的Ag-30Pd粉末的相结构与形貌的影响。结果表明，采用水合肼还原制备的Ag-30Pd共沉淀粉末，在335℃下经过油酸或氮气介质中液相或固相热处理后，粉末均朝合金化结构转变；采用抗坏血酸还原制备出的银钯合金粉初始为团聚颗粒，经400~450℃氮气气氛下热处理后，颗粒发生烧结而变得密实，结晶性提高；总体上，银钯共沉淀粉在335℃，合金粉在450℃的氮气保护下保温处理4 h后，粉末致密，粒径为1~3μm，可更好地满足银钯浆料的使用要求。
The effect of heat treatment condition on phase structures and morphologies of the Ag-30Pd powders prepared by different methods were investigated. The results show that Ag-30Pd coprecipitated powders produced by the hydrazine hydrate as reducing agent can transform to Ag-30Pd alloy by 335℃heat treatment under the condition of either oleic acid or nitrogen. The Ag-Pd alloy powders reduced by the oleic acid are composed of some agglomerated particles, and the density and crystallinity of the particles increases after heat treatment at 400~450℃. Overall, the Ag-30Pd powders with 1~3 μm particle sizes and high density after heat treatment under 335℃/4 h for coprecipitation powders, and 450℃/4 h for alloy powders can better meet the use requirements of electronic paste.
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