Mössbauer study of ultrafine amorphous Fe−B alloys
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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.
KeywordsThin Film Reaction Process Chemical Reduction KBH4 Mixed Molar Ratio
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