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用气-液两相稳定法在H2＋He混合气氛中制备了Cu-30%（质量分数）Ag复合纳米粉,并用制备的复合纳米粉作为导电相配制了导电浆料。用XRD、HRTEM、DSC-TG、红外光谱、化学分析、氧含量分析和电阻率测定等手段研究了粉体的相结构、表面组成、形貌、粒度、氧化特性和导电性。结果表明制备的复合纳米颗粒具有壳核结构,核为纳米Cu-30%（质量分数）Ag,壳为二乙二醇丁醚醋酸酯分子层和氧化层双层结构,粉体的粒度分布为10～60nm。在空气中,包覆在复合纳米粒子表面的二乙二醇丁醚醋酸酯分子在200℃左右脱附。在温度低于200℃时,气-液两相稳定法制备的复合纳米粉的抗氧化能力比气相稳定法制备的复合纳米粉的抗氧化能力好。Cu-30%（质量分数）Ag复合纳米粉导电浆料在烧结温度200℃、保温时间50min、真空度为5Pa条件下可获得电阻率为（1.56～3.92）×10-4Ω.cm的导电膜。

Cu-30wt%Ag composite nanopowders were prepared by a both gas and liquid phase stabilizing method in H2＋He,and conductive paste was prepared using composite nanopowders as conductive phase.The structure,morphology,surface layer and oxidation resistance as well as electrical conductivity of the nanoparticles were studied using X-ray diffraction（XRD）,high-resolution transmission electron microscopy（HRTEM）,infrared spectrum analysis,chemical analysis,gas analysis,differential thermal and thermogravimetry analysis.The results show that the nanoparticle size ranged from 10 to 60nm.The surface of nanoparticles are consisted of bi-layer including a 2-（2-butoxyethoxy） ethyl acetate molecules（C10H20O4） layer and a oxide layer,the bi-layer prevents the particles from a further oxidation in air.The 2-（2-butoxyethoxy）ethyl acetate molecules of nanoparticles surface are desorption at about 200℃ in air.At the temperature below 200℃,the oxidation resistance of the composite nanoparticles are prepared by a both gas and liquid phase stabilizing method is better than that of gas phase stabilizing method.The Cu-30wt%Ag composite nanopowders conductive paste sintered at 200℃ for 50min under 5Pa can be obtained a thick film with resistivity is（1.56-3.92）×10-4Ω·cm.