【摘要】 研究了表面修饰对AgSnO2触头材料的组织和性能的影响。考察了分散剂聚乙二醇对纳米SnO2溶胶的表面修饰作用;分析了化学镀的工艺对纳米掺杂AgSnO2电触头材料性能的影响。结果表明:采用分散剂和化学镀对纳米SnO2表面进行修饰,减少了纳米SnO2的硬团聚,改善了Ag与SnO2之间的浸润性和相容性,使AgSnO2触头材料的电导率提高23%,抗拉强度提高66%,伸长率提高100%,解决了AgSnO2材料的机加工性能差的问题。更多还原

【Abstract】 A series of novel doped nanocrystalline SnO₂ materials has been prepared,which focused on improving the electric and mechanical properties of AgSnO₂ electric contact materials.Chemical plating method was employed to modify the surface of the doped nanocrystalline SnO₂ particles,which decreased the hard congregation of SnO₂ particles,improved the wetting property and enhanced the cohesion between SnO₂ nano-particles and silver.As a result,the conductance of AgSnO₂ electric contact material increases by 23%.The tensile strength and elongation of the material increase by 66% and 100%,respectively.更多还原