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Effect of Borohydride Addition Rate on Chemically Prepared Amorphous Fe–B Particles

Published online by Cambridge University Press:  28 February 2011

C. Bender Koch ,
S. Mørup  and
S. Linderoth
C. Bender Koch
Affiliation:
Laboratory of Applied Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark.
S. Mørup
Affiliation:
Laboratory of Applied Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark.
S. Linderoth
Affiliation:
Laboratory of Applied Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark.
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Abstract

Amorphous Fe-B alloys can be prepared by reacting aqueous solutions of Fe salts and NaBH4. In this work the effect of the addition rate of the NaBH4 solution to the FeSO4 solution on the precipitate is investigated. The chemical composition of the amorphous alloys formed varies between Fe79B21 and Fe68B32. The hyperfine parameters of the alloys, derived from Mössbauer spectra, show a decrease from 29 to 25 T of the magnetic hyperfine field and an increase from 0.19 to 0.28 mms−1 of the isomer shift with increasing NaBH4 addition rate. The results suggest that alloys with different structures but identical composition may be produced by chemical reduction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 206: Symposium G – Clusters and Cluster-Assembled Materials , 1990 , 327
Copyright
Copyright © Materials Research Society 1991

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References

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