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| 热处理对Ag-30Pd粉末相结构与形貌的影响 |
| The Effect of Heat Treatment on Phases and Morphologies of Ag-30Pd Powders |
| 投稿时间：2015-07-29 |
| DOI： |
| 中文关键词: 金属材料 银钯 粉末 热处理 相结构 形貌 |
| 英文关键词: metal materials silver-palladium powder heat treatment phase structure morphology |
| 基金项目:国家自然科学基金项目(51261008)、昆明市科技局高新技术研究与开发项目(2013-02-02-A-G-02-3040)。 |
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| 中文摘要: |
| 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1~3 μm，可更好地满足银钯浆料的使用要求。 |
| 英文摘要: |
| 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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