研究了纳米掺杂氧化物 Sn O2 对 Ag Sn O2 触头材料性能的影响。采用溶胶 -凝胶法制备 Sn O2 与各种掺杂氧化物 (包括 Ti O2 、Zn O、Sb2 O3 、Cu O)的混合粉末。粉末的 X射线分析 (XRD)、透射电镜分析(TEM)表明 :所得粉末为纳米级 ,且...研究了纳米掺杂氧化物 Sn O2 对 Ag Sn O2 触头材料性能的影响。采用溶胶 -凝胶法制备 Sn O2 与各种掺杂氧化物 (包括 Ti O2 、Zn O、Sb2 O3 、Cu O)的混合粉末。粉末的 X射线分析 (XRD)、透射电镜分析(TEM)表明 :所得粉末为纳米级 ,且掺杂物离子能很好地进入到 Sn O2 的晶格中 ;对粉末进行的各项物理性能测试表明 :Sn O2 粉末的性能 ,尤其是电性能有了明显的改善 ,这对后续制造新型的 Ag Sn O2展开更多
The electric contact material of Ag/SnO2 composite was achieved by reactive synthesis method. The compositions and microstructure of Ag/SnO2 composite were analyzed and characterized by X-ray diffraction （XRD）, scan...The electric contact material of Ag/SnO2 composite was achieved by reactive synthesis method. The compositions and microstructure of Ag/SnO2 composite were analyzed and characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and high-resolution electron microscopy （HRTEM）. The struc- tural feature was typical of the particle reinforced composites. The HRTEM images revealed that the observed Ag/SnO2 interface was absence of the precipitated phase and the lattice contrast across the interface was clear and sharp. The average particle size of SnO2 in composite was near 50 nm and it was well dispersed in spherical shape. The thermodynamic mechanism of reactive synthesis method was also discussed. The electronic density distribution analysis of the interface showed the charges of Ag atoms transmitted to 0 atoms and the conductivity of the material was also affected. No extra compounds expected such as AgxOy formed at interface. The distribution of electrons was of inequality near the interface which explained why the mechanical property of the metal/ceramic materials was improved but the machining property declined.展开更多
介绍了Ag基触点材料的发展历史以及Ag Sn O2材料的研究现状,分析了Ag Sn O2材料在当前工业化生产中所面临的问题。针对国内粉体制备工艺的不足以及Ag Sn O2材料加工性能不佳等难题,总结了不同加工工艺对材料性能的影响,提出了以优化加...介绍了Ag基触点材料的发展历史以及Ag Sn O2材料的研究现状,分析了Ag Sn O2材料在当前工业化生产中所面临的问题。针对国内粉体制备工艺的不足以及Ag Sn O2材料加工性能不佳等难题,总结了不同加工工艺对材料性能的影响,提出了以优化加工工艺为出发点,探讨利用有限元分析(FEM)寻求最优工艺参数的可能性,并通过有限元分析法解决Ag Sn O2加工的困难,为改善材料的综合性能提供指导。展开更多
文摘研究了纳米掺杂氧化物 Sn O2 对 Ag Sn O2 触头材料性能的影响。采用溶胶 -凝胶法制备 Sn O2 与各种掺杂氧化物 (包括 Ti O2 、Zn O、Sb2 O3 、Cu O)的混合粉末。粉末的 X射线分析 (XRD)、透射电镜分析(TEM)表明 :所得粉末为纳米级 ,且掺杂物离子能很好地进入到 Sn O2 的晶格中 ;对粉末进行的各项物理性能测试表明 :Sn O2 粉末的性能 ,尤其是电性能有了明显的改善 ,这对后续制造新型的 Ag Sn O2
基金supported by the National Natural Science Foundation of China (Nos. 2008CB617609,u0837601, u0837603 and 50874054)the Science Innovation Foundation of Kunming University of Science and Technology
文摘The electric contact material of Ag/SnO2 composite was achieved by reactive synthesis method. The compositions and microstructure of Ag/SnO2 composite were analyzed and characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and high-resolution electron microscopy （HRTEM）. The struc- tural feature was typical of the particle reinforced composites. The HRTEM images revealed that the observed Ag/SnO2 interface was absence of the precipitated phase and the lattice contrast across the interface was clear and sharp. The average particle size of SnO2 in composite was near 50 nm and it was well dispersed in spherical shape. The thermodynamic mechanism of reactive synthesis method was also discussed. The electronic density distribution analysis of the interface showed the charges of Ag atoms transmitted to 0 atoms and the conductivity of the material was also affected. No extra compounds expected such as AgxOy formed at interface. The distribution of electrons was of inequality near the interface which explained why the mechanical property of the metal/ceramic materials was improved but the machining property declined.
文摘介绍了Ag基触点材料的发展历史以及Ag Sn O2材料的研究现状,分析了Ag Sn O2材料在当前工业化生产中所面临的问题。针对国内粉体制备工艺的不足以及Ag Sn O2材料加工性能不佳等难题,总结了不同加工工艺对材料性能的影响,提出了以优化加工工艺为出发点,探讨利用有限元分析(FEM)寻求最优工艺参数的可能性,并通过有限元分析法解决Ag Sn O2加工的困难,为改善材料的综合性能提供指导。
