[23a-C101-1~12] 13.2 Exploratory Materials, Physical Properties, Devices

▲ [23a-C101-3] Synthesis of Fe-silicides from Fe and CaSi₂ powders in NaCl molten salt

Jilani Ansari¹, Fumio Komeda¹, Yosuke Shimura^1,2, 〇Hirokazu Tatsuoka¹ (1.Grad. Sch. Integr. Sci. & Technol. Shizuoka Univ., 2.RIE, Shizuoka Univ.)

Keywords:silicide semiconductor

b-FeSi₂ has attracted attention for its potential as a thermoelectric and an optoelectronic material. b-FeSi₂ layers were grown on FeSi substrates by molten salt technique using NaCl–NaF–Na₂SiF₆ and Si powder. In the case, Si atoms diffused into FeSi substrates to form b-FeSi₂. Recently, metal-chlorides were used to synthesize Si- and silicide-nanosheet bundles using CaSi₂ crystal as a template. The molten salt technique using metal-chlorides provides several advantages for developing structural properties of the nanosheets, by introducing a variety of compound nanosheet synthesis and surface modification. However, the Fe-silicide formation was not observed using FeCl₂, and Fe-silicide formation process has not been understood yet. In this study, the formation of Fe-silicides was examined by molten salt technique using NaCl with Fe and CaSi₂ powders.