Method for producing composite microparticles, and composite microparticles

This method for producing composite microparticles comprises: a step for preparing a raw material containing a first selected element, which contains one or more first selected elements selected from among copper elements, molybdenum elements, and silver elements, and a raw material containing a second selected element, which contains one or more second selected elements selected from among copper elements, molybdenum elements, and silver elements; the starting material containing the second selected element comprises one or more second selected elements selected from the group consisting of titanium, germanium, silicon, tin, aluminum, zinc, zirconium, hafnium, iron, yttrium, niobium, tantalum, calcium, magnesium, indium, tungsten, molybdenum, and nickel; and a composite microparticle generation step in which the prepared raw materials are introduced into a thermal plasma to evaporate the raw materials, and the evaporated raw materials are cooled, thereby generating composite microparticles having an oxide of