| Abstract
| - Agglomerates of β-FeSi2 submicrometer-sized particles were prepared by heating a mixture of Fe and Si powders in a Na melt at 773-1073 K, which was about 350 K lower than the temperature of the previous study, for 1.5-24 h in an Ar atmosphere.
- β-FeSi2 powder was prepared by heating a mixture of Fe and Si powders with Fe/Si molar ratios of 1:2.25-2.50 in a Na melt at 773-1073 K for 1.5-24 h under an Ar atmosphere, while no β-FeSi2 was obtained at 1073 K for 24 h without Na. The β-FeSi2 phase was identified by powder X-ray diffraction. The primary and secondary grain sizes of β-FeSi2 powder observed by transmission electron microscopy and scanning electron microscopy were 100-400 nm and 5-80 µm, respectively.
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