Investigation on Low-Temperature Thermoelectric Properties of Ag2Se Polycrystal Fabricated by Using Zone-Melting Method

2021 ◽  
pp. 8246-8255
Author(s):  
Min Jin ◽  
Jiasheng Liang ◽  
Pengfei Qiu ◽  
Hui Huang ◽  
Zhongmou Yue ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermoelectric Properties ◽  
Zone Melting ◽  
Melting Method

Thermoelectric Properties of n-type (Bi2Se3)x(Bi2Te3)1-x Crystals Prepared by Zone Melting

2008 ◽  
Vol 368-372 ◽  
pp. 547-549
Author(s):  
Jun Jiang ◽  
Ya Li Li ◽  
Gao Jie Xu ◽  
Ping Cui ◽  
Li Dong Chen
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Zone Melting ◽  
Chemical Compositions ◽  
Melting Method ◽  
Temperature Range

In the present study, n-type (Bi2Se3)x(Bi2Te3)1-x crystals with various chemical compositions were fabricated by the zone melting method. Thermoelectric properties, including Seebeck coefficient (α), electrical conductivity (σ) and thermal conductivity (κ), were measured in the temperature range of 300-500 K. The influence of the variations of Bi2Te3 and Bi2Se3 content on thermoelectric properties was studied. The increase of Bi2Se3 content (x) caused an increase in carrier concentration and thus an increase of σ and a decrease of α. The maximum figure of merit (ZT = α2σT/κ) of 0.87 was obtained at about 325 K for the composition of 93%Bi2Te3-7%Bi2Se3 with doping TeI4.

Thermoelectric properties of Rh-doped Ru2Si3 prepared by floating zone melting method

2001 ◽  
Vol 294 (1-2) ◽  
pp. 202-205 ◽  
Author(s):  
Yuji Arita ◽  
Satoshi Mitsuda ◽  
Yoshimasa Nishi ◽  
Tsuneo Matsui ◽  
Takanori Nagasaki
Keyword(s):  
Thermoelectric Properties ◽  
Zone Melting ◽  
Floating Zone ◽  
Melting Method

The Thermoelectric Performance Enhancement of N-Type BiTeSe Alloys by Addition of ZnAlO

2012 ◽  
Vol 512-515 ◽  
pp. 1647-1650
Author(s):  
Ting Zhang ◽  
Jun Jiang ◽  
Sheng Hui Yang ◽  
Yong Biao Zhai ◽  
Gao Jie Xu
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Low Temperature ◽  
Seebeck Coefficient ◽  
Ambient Temperature ◽  
Performance Enhancement ◽  
Zone Melting ◽  
Melting Method ◽  
Intrinsic Excitation

A series of n-type BiTeSe/ZnAlO composites were prepared by zone melting method. Thermoelectric properties, including the electrical conductivity σ, Seebeck coefficient α and thermal conductivity κ, were measured in the temperature range of 300-550K. Results show that the electrical properties have been slightly lowered due to the reduced carrier concentration by ZnAlO addition. However, the low-temperature-shifted peak α, resulting from the prematurely happened intrinsic excitation, have shifted peak ZT to lower temperatures. As a result, the ZT values at 300 K were significantly enhanced for BiTeSe/ZnAlO composites compared to that of BiTeSe, making more attractive for cooling applications at ambient temperature.

scholarly journals Preparation of Bulky Zr-Based Amorphous Alloys by a Zone Melting Method

1994 ◽  
Vol 35 (12) ◽  
pp. 923-926 ◽  
Author(s):  
Akihisa Inoue ◽  
Yoshihiko Yokoyama ◽  
Yoshiyuki Shinohara ◽  
Tsuyoshi Masumoto
Keyword(s):  
Amorphous Alloys ◽  
Zone Melting ◽  
Melting Method

The low-temperature thermoelectric properties of tin-doped bismuth

1979 ◽  
Vol 9 (12) ◽  
pp. 2387-2398 ◽  
Author(s):  
J Boxus ◽  
J Heremans ◽  
J -P Michenaud ◽  
J -P Issi
Keyword(s):  
Low Temperature ◽  
Thermoelectric Properties

Low-temperature galvanomagnetic, magnetic, and thermoelectric properties ofMo3Sb7−xTex(x=0.0, 0.3, 1.0, 1.6, and 1.8)

2009 ◽  
Vol 79 (23) ◽  
Author(s):  
C. Candolfi ◽  
B. Lenoir ◽  
A. Dauscher ◽  
J. Hejtmánek ◽  
J. Tobola
Keyword(s):  
Low Temperature ◽  
Thermoelectric Properties

LOW TEMPERATURE THERMOELECTRIC PROPERTIES AND AGING PHENOMENA OF NANOSTRUCTURED p-TYPE Bi2-XSbXTe3 (x = 1.46, 1.48, 1.52 AND 1.55)

2013 ◽  
Vol 06 (05) ◽  
pp. 1340008 ◽  
Author(s):  
DALE HITCHCOCK ◽  
YEN-LIANG LIU ◽  
YUFEI LIU ◽  
TERRY M. TRITT ◽  
JIAN HE ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Low Temperature ◽  
Thermoelectric Properties ◽  
Optimal Composition ◽  
Ambient Conditions ◽  
Bulk Materials ◽  
The Past ◽  
Aging Phenomena ◽  
P Type ◽  
Cold Pressed

Over the past decade the widely used p-type ( Bi 2-x Sb x) Te 3 bulk thermoelectric materials have been subject to various nanostructuring processes for higher thermoelectric performance. However, these nanostructuring processing were conducted on compositions optimized for bulk materials (x ~ 1.52–1.55). This leads to the question of whether the optimal composition for bulk materials is the same for their nanoscale counterparts. In this work we hydrothermally grew Bi 2-x Sb x Te 3 nanopowders (nominally, x = 1.46, 1.48, 1.52 and 1.55) and measured their thermoelectric properties on cold-pressed vacuum-sintered pellets (74–78% of the theoretical density) below 300 K. The measurements were conducted 18 months apart to probe the aging phenomena, with the samples stored in ambient conditions. We have found that (i) the peak of thermopower shifts to lower temperatures upon nanostructuring but it shifts back to higher temperatures upon aging; (ii) the electrical conductivity degrades by a factor of 1.5–2.3 upon aging while the temperature dependence is largely retained; and (iii) the ZT of freshly made samples is sensitive to the x value, a maximum ZT ~ 1.25(~ 0.62) at ~ 270 K (~ 255 K) was attained in the freshly made sample x = 1.55(x = 1.46), respectively; while the ZT of aged samples is significantly lowered by a factor of 2–4 but lesser x-dependent. These observations have been discussed in the context of charge buildup and compensation at grain boundaries.

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