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Synthesis and properties of Fe–B powders by molten salt method

Published online by Cambridge University Press:  08 February 2017

Ya’nan Wei ,
Zetan Liu ,
Songlin Ran ,
Ailin Xia ,
Ting-Feng Yi  and
Yuexia Ji
Ya’nan Wei
Affiliation:
Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China
Zetan Liu
Affiliation:
Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China
Songlin Ran*
Affiliation:
Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China
Ailin Xia
Affiliation:
Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China
Ting-Feng Yi*
Affiliation:
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243002, China
Yuexia Ji
Affiliation:
School of Mathematics and Physics, Anhui University of Technology, Ma'anshan 243002, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

Crystallized FeB and Fe2B powders were synthesized by a molten salt method with elemental Fe and B powders as starting materials. The results indicated that the presence of molten NaCl/KCl salts and the excess of Fe or B powders were essential to obtain pure FeB or Fe2B powders. The formation mechanism of iron borides was investigated by examining the phase compositions of the obtained products with different molar ratio of Fe/B. It was found that Fe powders firstly reacted with B powders to form Fe2B phase, and FeB phase formed from the reaction between Fe2B and excessive B. The as-synthesized FeB and Fe2B powders had a uniform short-rod and plate like morphology, respectively. Both FeB and Fe2B exhibited typical soft magnetic behavior. The saturation magnetization and the coercivity were 36.4 emu/g and 15.5 kA/m for FeB, 126.9 emu/g and 6.1 kA/m for Fe2B, respectively. The electrochemical performances of the as-synthesized FeB powders were evaluated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance test.

Keywords

Bmagnetic propertiespowder
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 4 , 28 February 2017 , pp. 883 - 889
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Michael E. McHenry

References

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