Process for producing powders of transition metal boride

摘要

A process of producing a powder of a transition-metal boride includes producing metal boride particles in a molten metal by contacting a molten salt, to which at least one boron compound was added, with the molten metal containing a transition-metallic element selected from the Groups IV and V of the Periodic Table at an atomic ratio of elemental boron to transition-metallic element from 0.5 to 4.0, while maintaining a contact temperature which is not lower than the melting point of the molten metal and which is less than 1000 DEG C., and recovering the particles from the molten metal. According to the present invention, fine powders of the transition-metal boride which contain few agglomerated particles may be easily obtained using relatively inexpensive feed materials, such as the boron oxides, at a low temperature less than 1000 DEG C. without the necessity of a grinding step.