| 引用本文: | 曹晓国,张海燕,陈易明.包覆型铜-银双金属粉的制备[J].材料科学与工艺,2011,19(2):96-99.DOI:10.11951/j.issn.1005-0299.20110220. |
| CAO Xiao-guo,ZHANG Hai-yan,CHEN Yi-ming.Preparation of coated Cu-Ag bimetallic particles[J].Materials Science and Technology,2011,19(2):96-99.DOI:10.11951/j.issn.1005-0299.20110220. |
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| 摘要: |
| 为了提高铜粉的抗氧化性能,在超细铜粉表面包覆一层具有优良导电性和抗氧化的银,以乙酰丙酮(Acac)为Cu2+的螯合剂,采用置换反应法制备与原超细铜粉粒度相同的包覆型铜-银双金属粉.采用X射线衍射仪(XRD)、煅烧后增重等手段分析包覆型铜-银双金属粉的抗氧化性能,并用扫描电子显微镜(SEM)表征了其表面形貌.结果表明,乙酰丙酮用量以n(Acac)∶n(AgNO3)=1∶1为宜,AgNO3浓度与铜-银双金属粉的抗氧化性能成反比,AgNO3用量与其抗氧化性能成正比. |
| 关键词: 铜-银双金属粉 抗氧化性能 螯合剂 螯型化合物 还原反应 |
| DOI：10.11951/j.issn.1005-0299.20110220 |
| 分类号:TB383.3 |
| 基金项目:国家自然科学基金资助项目(20271014,50372013);毫米波国家重点实验室开发课题(K200804);广东省科技计划项目(2008B010800004);粤港关键领域重点突破招标项目(200849836);广东省自然科学基金项目(07001769) |
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| Preparation of coated Cu-Ag bimetallic particles |
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CAO Xiao-guo, ZHANG Hai-yan, CHEN Yi-ming
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Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006, China,
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| Abstract: |
| Cu particles were coated with Ag for a better conductivity and antioxidation.Acetylacetone was used as chelating reagent,and then Cu particles reacted in silver amine solution to prepare Cu-Ag bimetallic particles through displacement reaction method.The oxidation-resistance of the coated Cu-Ag bimetallic particles was investigated by means of XRD and gravimetricn method.And the particle morphologies were observed by SEM.The results showed that the appropriate molar ratio of acetylacetone to AgNO3 was 1∶ 1.The oxidation-resistance of Cu-Ag bimetallic particles was in inverse proportion to the concentration of AgNO3,while in direct proportion to the dosage of AgNO3. |
| Key words: Cu-Ag bimetallic particles oxidation-resistance chelating reagent chelating compound reductive reaction |
