| 摘要 |
A method for preparing a nano-sized transition metal boride powder simply and inexpensively is provided. A method for preparing a transition metal boride powder comprises: a step(S10) of mixing a transition metal halide powder with an alkali metal borohydride powder to prepare a mixed powder; a step(S20) of injecting the mixed power and a plurality of balls into a reaction vessel; a step(S30) of charging inert gas into the reaction vessel and sealing the reaction vessel; a step(S40) of ball-milling the mixed powder using high energy to prepare a composite powder comprising a transition metal boride and an alkali metal halide; a step(S50) of dispersing the composite powder into water, dissolving the alkali metal halide into water, and filtering the dissolved solution; and a step(S60) of drying the filtered composite powder to recover a transition metal boride powder, wherein in the step of recovering the transition metal boride powder, the transition metal boride powder has a particle size of greater than 0 to not greater than 100 nm. Further, in the step(S10), a molar ratio of the alkali metal borohydride powder to the transition metal halide powder is 0.3 to 3, and a alkali metal hydride powder is additionally mixed in the mixed powder.
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