[en] In this paper, MgCNi₃ microparticles have been first synthesized via a solid-state route through the reaction of metallic sodium, magnesium chloride, and nickelocene in a stainless steel autoclave at a relatively low temperature of 700°C. The reaction temperature required for MgCNi₃ microparticles preparation in our method is much lower than that used in the reported methods. The as-obtained MgCNi₃ microparticles are investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The magnetic measurement shows that the superconducting transition of the as-obtained MgCNi₃ microparticles occurs at about 8.0 K. (author)