1 research outputs found
Chemical Synthesis of Iron Antimonide (FeSb<sub>2</sub>) and Its Thermoelectric Properties
Low temperature thermoelectric (TE)
materials are in demand for more efficient cooling and power generation
applications. Iron antimonide (FeSb<sub>2</sub>) draws great attention
over the past few years because of its enhanced power factor values.
Polycrystalline bulk FeSb<sub>2</sub> nanopowder was prepared via
a low-temperature molten salts approach followed by subsequent thermal
treatment in synthetic air and hydrogen gas for calcination and reduction
reactions, respectively. Structural analysis confirms the desired
final phase with submicrometer grain size and high compaction density
after consolidation using spark plasma sintering (SPS). TE transport
properties revealed that the material is n-type below 150 K and p-type
above this temperature; this suggests antimony vacancies in FeSb<sub>2</sub>. The electrical conductivity increased significantly, and
the highest conductivity achieved was 6000 S/cm at 100 K. The maximum
figure-of-merit, ZT, of 0.04 is achieved at 500 K, which is about
6 times higher than the earlier reported state-of-the art ZT value
for the same material