The chemical composition of ultrafine amorphous Fe-B powders prepared by a chemical reduction depends on the mixed molar ratio of KBH4 to Fe ions. We propose the following reaction processes for the formation of ultrafine Fe-B powders: (1) 4Fe2++2BH4-+6OH-→2Fe2B+6H2O+H2 and (2) 4Fe2++2BH4-+7OH-→2Fe3B+Fe+BO2+5H2O+5/2H2.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry