首先以纳米SnO2粉体和AgNO3为原料,滤纸为模板,通过浸渍、煅烧制备了Ag-SnO2复合粉体,然后利用Ag-SnO2粉体为原料,采用压制、烧结工艺制备了Ag-SnO2电接触合金.进一步通过XRD和SEM等分析手段对所制备的复合粉体和合金样品进行表征,并借助TG-DSC对滤纸前躯体的分解过程进行分析,同时研究了不同纳米SnO2含量对Ag-SnO2电接触合金组织和性能的影响.结果表明,所制备的Ag-SnO2复合粉体由四方相金红石型结构的SnO2和立方相的银组成,模板去除干净,无杂质引入.由于滤纸模板的引入使得SnO2颗粒弥散分布于银基体中.随着SnO2含量的增加,Ag-SnO2电接触合金的硬度有上升趋势,但高氧化物含量也导致模板的分散效果变差,使得合金的电导率和致密度逐渐降低.
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