▎ 摘　　要

Owing to its exceptional properties, graphene has been considered to be a new and promising reinforcement for oxide ceramics over the last few years. Herein, in situ multilayer graphene/MgAl2O4 composite powders with homogeneously distributed graphene were synthesized via one-step carbon-bed sintering with magnesium citrate serving as the source of both MgO and carbon. The products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, and Raman spectroscopy. The microstructure and synthesis mechanism of the products were characterized and discussed. The results indicated that graphene with 6-10 layers grows between or outside the MgAl2O4 grains. The carbon content of the products was 5.96 wt%. The crystallite size of carbon (La) of in situ graphene increased as temperature rose to 1400 degrees C. The composite powders synthesized retained the size and morphology of the Al2O3 raw material, confirming the template mechanism of spinel synthesis.