叶晨琳.锡酸锌纳米粉体的制备及其在电接触材料中的应用[J].稀有金属材料与工程,2020,49(4):1288~1294.[Ye Chenlin.Preparation of cubic Zinc Stannate nanopowder and its application in Silver-based Electrical Contact Material[J].Rare Metal Materials and Engineering,2020,49(4):1288~1294.]
锡酸锌纳米粉体的制备及其在电接触材料中的应用
投稿时间:2019-05-04  修订日期:2019-11-24
中文关键词:  Ag/Zn2SnO4  电接触材料  电学性能  化学共沉淀
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      以不同的锌源,锡源与沉淀剂为原料,采用化学共沉淀法成功合成了具有尖晶石结构的高纯度立方锡酸锌纳米粉体。采用机械合金化和粉末冶金技术制备Ag/Zn2SnO4电接触材料。探究了煅烧温度、锌源种类和沉淀剂类型等工艺参数对Zn2SnO4粉体的微观结构和Ag/Zn2SnO4电接触材料性能的影响规律。采用场发射扫描电子显微镜和X射线电子衍射仪表征锡酸锌粉体的形貌和物相,并测试Ag/Zn2SnO4电接触材料的电阻率,硬度与密度等物理性能。结果表明:以五水四氯化锡,氯化锌与碳酸钠为原料,于1000℃条件下煅烧3h合成的Zn2SnO4增强Ag基电接触材料可达到最佳电阻率2.31μΩ·cm,此时材料相应的密度和维氏硬度分别为9.51g / cm3和65.63Hv0.5。相比于传统的Ag/SnO2与Ag/ZnO电接触材料,Ag/Zn2SnO4电接触材料在电学性能和致密度上具有明显优势;由Ag/Zn2SnO4材料的断口组织分析可知,Ag相与Zn2SnO4增强相颗粒间结合良好。
Preparation of cubic Zinc Stannate nanopowder and its application in Silver-based Electrical Contact Material
英文关键词:Ag/Zn2SnO4  electrical contact material  electrical performance  chemical co-precipitation
英文摘要:
      High-purity cubic zinc stannate nanopowder with spinel structure was successfully synthesized by chemical co-precipitation method with different zinc sources, tin sources and precipitants as raw matterials. Zinc stannate nanopowders as reinforced phase were applied to strengthen the properties of silver-based electrical contact materials. Ag/Zn2SnO4 electrical contact materials were prepared by Mechanical Alloying and Powder Metallurgy technique. In this work, effects of the processing parameters such as heat treated temperature, types of zinc sources and types of precipitants on the microstructure and physical performance of Ag/Zn2SnO4 electrical contact materials were investigated. The morphology and phase of zinc stannate nanopowder were characterized by Field Emission Scanning Electron Microscopy and X-ray Electron Diffractometry. The electrical resistivity, hardness and density of Ag/Zn2SnO4 electrical contact materials were also investigated in this paper. The results show that by using tin chloride, zinc chloride and sodium carbonate, under the condition of sintering temperature at 1000℃ for 3h, the optimal electrical resistivity, density and Vickers hardness of the Ag/Zn2SnO4 electrical contact material can reach 2.31μΩ·cm, 9.51g/cm3 and 65.63Hv0.5, respectively. Especially, the lower electrical resistivity of Ag/Zn2SnO4 contact prefers to that of traditional Ag/SnO2 electrical contacts. Compared with traditional Ag/SnO2 and Ag/ZnO electrical contacts, Ag/Zn2SnO4 electrical contact material has obvious advantages in electrical properties and density. And Ag/Zn2SnO4 electrical contact material also has more compact fracture morphology and shows better interface bonding performance.
作者单位E-mail
叶晨琳 材料科学与工程学院 yecl170@126.com 
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