| Title of Article |
Thermoelectric Properties of Bulk Yttrium Silicide (YSi2) Fabricated by Arc Melting and Spark Plasma Sintering |
| Date of Acceptance |
10 January 2018 |
| Journal |
| Title of Journal |
Physica Status Solidi A: Applications and Materials Science |
| Standard |
SCOPUS |
| Institute of Journal |
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| ISBN/ISSN |
Materials Science |
| Volume |
|
| Issue |
|
| Month |
|
| Year of Publication |
2018 |
| Page |
|
| Abstract |
Yttrium silicide (YSi2) nanoparticles in SiGe are reported to enhance the
thermoelectric figure-of-merit (ZT) to the recorded value (1.81). However,
the thermoelectric properties of bulk YSi2 has never been reported. In this
work, the thermoelectric properties of YSi2 is studied for the first time. The
bulk YSi2 is fabricated by arc melting highly pure Si and Y raw materials. The
ingot is crushed to powder and compacted to form a highly dense pellet by
spark plasma sintering. By optimizing the processing parameters, the single
phase with the AlB2-type structure (P6/mmm) is formed. The Hall measurements
show that YSi2 exhibit a metallic-like behavior with a very high
electron concentration. This result in the thermoelectric properties with a
very large electrical conductivity (18105Ω1m1) but a small Seebeck
coefficient (26mVK1) at room temperature, and decrease with temperature.
The thermal conductivity is around 14–19Wm1 K1 for all temperature
range. The maximum ZT value is 0.026 at 423 K. |
| Keyword |
silicides, spark plasma sintering, thermoelectric, YSi2 |
| Author |
|
| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Publication
Journal Publication
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