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METAL NANOCOMPOSITE POWDERS IN WHICH CARBON NANOTUBES ARE UNIFORMLY DISPERSED INTO METAL MATRIX BY DISPERSING, ULTRASONIC TREATMENT, MIXING, ULTRASONIC TREATMENT, DRYING AND CALCINATION AND REDUCTION PROCESSES, AND PREPARATION METHOD
METAL NANOCOMPOSITE POWDERS IN WHICH CARBON NANOTUBES ARE UNIFORMLY DISPERSED INTO METAL MATRIX BY DISPERSING, ULTRASONIC TREATMENT, MIXING, ULTRASONIC TREATMENT, DRYING AND CALCINATION AND REDUCTION PROCESSES, AND PREPARATION METHOD
PURPOSE: To provide a metal nanocomposite powder preparation method capable of solving agglomeration problem of carbon nanotubes by uniformly dispersing carbon nanotubes into a metal matrix, and metal nanocomposite powders comprising the carbon nanotubes uniformly dispersed into the metal matrix, the metal nanocomposite powders prepared by the method. CONSTITUTION: A preparation method of metal nanocomposite powders in which carbon nanotubes are dispersed into a metal matrix comprises a step(a) of dispersing carbon nanotubes into an appropriate dispersion solvent; a step(b) of ultrasonic treating a solution in which carbon nanotubes are dispersed into the dispersion solvent; a step(c) of uniformly mixing a water soluble metal salt or metal hydrate with the dispersed solution of the step(b), wherein the metal is selected from the group consisting of copper, nickel, cobalt, iron and tungsten; a step(d) of ultrasonic treating a mixed dispersed solution of the step(c); a step(e) of drying and calcining a dispersed mixed solution of the step(d), wherein the drying process is performed at a temperature of 80 to 100 deg.C, the calcination process is performed at a temperature of about 200 to 350 deg.C at an air atmosphere if the metal matrix is required to be calcined at a temperature of 400 deg.C or less, the calcination process is performed at a temperature of about 400 to 1,700 deg.C under the low vacuum state if the metal matrix is required to be calcined at a temperature of 400 deg.C or more, and a drying process is additionally performed in a temperature range of 300 to 350 deg.C if the metal matrix is required to be calcined at a temperature of 400 deg.C or more; and a step(f) of reducing metal oxide nanocomposite powders prepared in the step(e) at an atmosphere of a reduction gas that is hydrogen gas, CO gas, or CO2 gas.
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