The invention provides a manufacturing method of
micrometer and nanometer composite spherical
metal powder of a core-shell structure. The manufacturing method comprises the steps that 1, a composite
metal powder precursor is prepared; 2, the prepared composite
metal powder precursor is evenly mixed with carbon material powder or
ceramic material powder; 3, one or more kinds of metal in the composite metal precursor is molten through high-
temperature treatment, after solidification, composite metal spheres of a core-shell structure are formed, wherein the temperature of high-
temperature treatment at least reaches the
melting temperature of one kind of metal in the composite metal precursor, and particularly the temperature is 400-1000 DEG C higher than the
melting point of the kind of metal; 4, the carbon material powder or the
ceramic material powder are removed, so that the
micrometer and nanometer composite spherical
metal powder of the core-shell structure is formed. The size of the composite
metal powder precursor is smaller than 10 mm, and the optimal size of the composite
metal powder precursor ranges from 50 nm to 1 mm. The degree of
sphericity of composite metal spheres of the core-shell structure is high, and the composite metal spheres of the core-shell structure can be widely applied to
powder metallurgy and conductive
slurry.