Microstructure and thermoelectric properties of β-FeSi2 ceramics fabricated by hot-pressing and spark plasma sintering

Eco-Fabrication Process and Thermoelectric Properties of β-FeSi₂

“…This behavior is typical of thermoelectric semiconductors. In the n-type case, the electrical resistivity of the IFACS sample was almost same, compared with the HP [9] and the SPS [14] samples. Because the Co-carrier concentration was almost same.…”

“…4 shows the temperature dependence of the Seebeck coefficient of (a) n-type Co-doped and (b) p-type Mn-doped products. In the case of the n-type products, the Seebeck coefficient of the IFACS sample was higher than that of the HP [9] and the SPS [14] samples until about 1000K. In the Fe-Si system, the samples differed in terms of their carrier concentration and amount of residual ε-phase.…”

“…4. Temperature dependence of Seebeck coefficient of (a) n-type Co-doped and (b) p-type Mn-doped IFACS, HP [9], and SPS [14,15] samples.…”

“…5. Temperature dependence of electrical resistivity of (a) n-type Co-doped and (b) p-type Mn-doped IFACS, HP [9], SPS [14,15] samples. These results clearly indicated that β-FeSi2 with relatively high thermoelectric properties was produced by an eco-process involving IFACS/SPIC.…”

“…The thermoelectric properties of p-type and n-type β-FeSi2 were compared with those of samples produced by other, conventional processing techniques, such as hot pressing (HP) [9] and spark plasma sintering (SPS) [14,15].…”