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

机译：熔融盐法合成Fe-B粉及其性能

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摘要

Crystallized FeB and Fe_2B 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 Fe_2B 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 Fe_2B phase, and FeB phase formed from the reaction between Fe_2B and excessive B. The as-synthesized FeB and Fe_2B powders had a uniform short-rod and plate like morphology, respectively. Both FeB and Fe_2B 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 Fe_2B, respectively. The electrochemical performances of the as-synthesized FeB powders were evaluated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance test.
机译：以元素Fe和B粉末为原料，通过熔融盐法合成了结晶的FeB和Fe_2B粉末。结果表明，熔融的NaCl / KCl盐的存在以及过量的Fe或B粉末对于获得纯FeB或Fe_2B粉末至关重要。通过研究不同摩尔比的Fe / B获得的产物的相组成，研究了硼化铁的形成机理。研究发现，Fe粉首先与B粉反应形成Fe_2B相，Fe_2B与过量B之间的反应形成FeB相。合成后的FeB粉和Fe_2B粉分别具有均匀的短棒状和板状形态。 FeB和Fe_2B均表现出典型的软磁行为。 FeB的饱和磁化强度和矫顽力分别为36.4 emu / g和15.5 kA / m，Fe_2B的饱和磁化强度和矫顽力分别为126.9 emu / g和6.1 kA / m。通过循环伏安法，恒电流充放电和电化学阻抗测试，评价了合成后的FeB粉末的电化学性能。

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  • 来源
    《Journal of Materials Research》 |2017年第4期|883-889|共7页
  • 作者

    Yanan Wei; Zetan Liu; Songlin Ran; Ailin Xia; Ting-Feng Yi; Yuexia Ji;

  • 作者单位

    Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma 'anshan 243002, China;

    Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma 'anshan 243002, China;

    Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma 'anshan 243002, China;

    Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Ma 'anshan 243002, China;

    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma 'anshan 243002, China;

    School of Mathematics and Physics, Anhui University of Technology, Ma' anshan 243002, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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