Abstract
The superconductor MgCNi3, an intermetallic compound with a cubic perovskite crystal structure, was synthesized fromMg, Ni and graphite powders by hybrid microwave heating in a short time. The phases,microstructures and superconductivity were characterized using x-ray diffraction, energydispersive x-ray analysis, scanning electron microscopy, the standard four-probe method andmagnetic measurements. The results indicate that the phases of the synthesized sample areMgCNi3 (major phase), a small amount of unreacted graphite and a little MgO. TheMgCNi3 particle sizes range from two to several microns. The onset superconducting transition temperature ofthe MgCNi3 sample was 6.9 K, and the superconducting transition width was about 0.8 K.
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