▎ 摘　　要

NOVELTY - Preparing high stability graphene dispersion liquid comprises e.g. mixing graphene, dispersing agent and solvent, where dispersant is dimethyl carbonate, N,N,N',N'-tetramethylethylenediamine, methyl formate or acetonitrile; solvent is anhydrous ethanol, ether or acetone; graphene is prepared by liquid phase peeling method known in the art; and ceramic is zirconium dioxide ceramic, mixing dispersant and solvent in a ratio, adding into a planetary ball mill, drying and wet mixing at 20-50 revolutions per minute and stirring abraded product in a spiral magnetic field with a magnetic field. USE - The dispersion liquid is useful for impregnating ceramic based composite material (claimed). ADVANTAGE - The dispersion liquid: improve the wet ability between graphene and the matrix, and improve the binding of graphene and ceramic substrates. DETAILED DESCRIPTION - Preparing high stability graphene dispersion liquid comprises (ia) mixing 1-10 pts. wt. graphene, 0.5-5 pts. wt. dispersing agent and solvent (balance amount), where dispersant is dimethyl carbonate (DMC), N,N,N',N'-tetramethylethylenediamine (TEMED), methyl formate (MF) or acetonitrile; solvent is anhydrous ethanol, ether or acetone; graphene is prepared by liquid phase peeling method known in the art; and ceramic is zirconium dioxide ceramic, (ib) mixing dispersant and solvent in a ratio, adding into a planetary ball mill, drying and wet mixing at 20-50 revolutions per minute, (ii) stirring abraded product in a spiral magnetic field with a magnetic field strength of 0.5-5 T, stirring at 50-100 revolution per minute, mixing for 0.5-2 hours, where stirring method is one minute clockwise, and temperature of one minute counterclockwise is 25 degrees C, (iii) sonicating the product after the spiral magnetic field and ultrasonicating at 25 degrees C for 3 seconds, and (iv) centrifuging the sonicated product at 8000 revolutions per minute and then filtering to obtain final product.