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|Title: ||Thermoelectric Properties of Pulsed Electric Current Sintered Samples of AgPbmSbSe17 (m = 16 or 17)|
|Authors: ||Wu, Chun-I|
Kanatzidis, Mercouri G.
Timm, Edward J
Case, Eldon D
Hogan, Timothy P
|Keywords: ||Thermoelectric materials|
pulsed electric current sintering
|Issue Date: ||2018-09-28T08:18:03Z
|Publisher: ||Journal of Electronic Materials|
|Abstract: ||Abstract: Lead chalcogenide materials have drawn attention in recent years because of
their outstanding thermoelectric properties. Bulk n-type materials of
AgPbmSbTe2+m have been reported to exhibit high figure of merit, ZT, as high
as 1.7 at 700 K. Recent reports have shown p-type lead selenide-based compounds
with comparable ZT. The analogous material AgPbmSbSe17 shares a
similar cubic rock-salt structure with PbTe-based compounds; however, it
exhibits a higher melting point, and selenium is more abundant than tellurium.
Using solid solution chemistry, we have fabricated cast AgPb15SbSe17
samples that show a peak power factor of approximately 17 lW/cm K2 at
450 K. Increasing the strength of such materials is commonly achieved
through powder processing, which also helps to homogenize the source
materials. Pulsed electric current sintering (PECS) is a hot-pressing technique
that utilizes electric current through the die and sample for direct Joule
heating during pressing. The mechanisms present during PECS processing
have captured significant research interest and have led to some notable
improvements in sample properties compared with other densification techniques.
We report the thermoelectric properties of PECS samples of
AgPbmSbSe17 along with sample fabrication and processing details.
|Appears in Collections:||[機械與機電工程學系] 期刊論文|
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