scholarly journals High temperature thermoelectric properties of Zn-doped Eu5In2Sb6

2015 ◽  
Vol 3 (40) ◽  
pp. 10518-10524 ◽  
Author(s):  
Sevan Chanakian ◽  
Umut Aydemir ◽  
Alex Zevalkink ◽  
Zachary M. Gibbs ◽  
Jean-Pierre Fleurial ◽  
...  
Keyword(s):  
High Temperature ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Zintl Phase ◽  
P Type

The Zintl phase Eu5In2−xZnxSb6 (x = 0, 0.025, 0.05, 0.1, 0.2) with optimized p-type carrier concentration displays a zT of up to 0.4 at ∼660 K.

Synthesis and High Temperature Thermoelectric Properties of Alkaline-Earth Metal Hexaborides MB6 (M=Ca, Sr, Ba)

2003 ◽  
Vol 793 ◽  
Author(s):  
Masatoshi Takeda ◽  
Yosuke Kurita ◽  
Keisuke Yokoyama ◽  
Takahiro Miura ◽  
Tsuneo Suzuki ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
High Temperature ◽  
Seebeck Coefficient ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Thermoelectric Device ◽  
Alloying Effect ◽  
P Type

ABSTRACTPolycrystalline alkaline-earth hexaborides (MB6: M =Ca, Sr, Ba) were synthesized and their thermoelectric and transport properties were examined to discuss their possibility as high temperature thermoelectric materials. Hall measurements showed that carrier concentration of the BaB6 was the highest among the three hexaborides and that of CaB6 was the lowest. Substitution of part of the alkaline earth metals with one of the others changed the carrier concentration of the hexaboride. As the carrier concentration increased, Seebeck coefficient increased and electrical conductivity decreased. These results suggest that the thermoelectric properties of the divalent hexaborides depend largely on the carrier concentration, and optimum carrier concentration which gives maximum power factor was estimated to be approximately 2x1026 m−3. Consequently, such a substitution enables us to control Seebeck coefficient and electrical conductivity of the hexaborides, and will also be effective to reduce the lattice heat conduction due to the alloying effect. A thermoelectric device was fabricated using SrB6 and boron carbide thin films as n-type and p-type elements, respectively. To the best of our knowledge, this is the first demonstration of a thermoelectric device composed of only boron-rich solids.

High-temperature thermoelectric properties of p-type skutterudites Ba0.15Yb x Co3FeSb12 and Yb y Co3FeSb9As3

2014 ◽  
Vol 50 (1) ◽  
pp. 34-39 ◽  
Author(s):  
Yongkwan Dong ◽  
Pooja Puneet ◽  
Terry M. Tritt ◽  
George S. Nolas
Keyword(s):  
High Temperature ◽  
Thermoelectric Properties ◽  
P Type

Off-stoichiometry effects on the thermoelectric properties of Cu2+δSe (−0.1 ≤ δ ≤ 0.05) compounds synthesized by a high-pressure and high-temperature method

CrystEngComm ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 695-700 ◽  
Author(s):  
Lisha Xue ◽  
Weixia Shen ◽  
Zhuangfei Zhang ◽  
Manjie Shen ◽  
Wenting Ji ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Chemical Composition ◽  
Transport Properties ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Carrier Mobility ◽  
Temperature Method

The chemical composition can directly tune the transport properties of Cu2Se liquid-like materials, including the carrier concentration, carrier mobility and superionic feature.

scholarly journals High Temperature Thermoelectric Properties of the Solid-Solution Zintl Phase Eu11Cd6–xZnxSb12

2015 ◽  
Vol 27 (12) ◽  
pp. 4413-4421 ◽  
Author(s):  
Nasrin Kazem ◽  
Antonio Hurtado ◽  
Fan Sui ◽  
Saneyuki Ohno ◽  
Alexandra Zevalkink ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Zintl Phase

High-Temperature Thermoelectric Properties of the Solid–Solution Zintl Phase Eu11Cd6Sb12–xAsx (x < 3)

2014 ◽  
Vol 26 (3) ◽  
pp. 1393-1403 ◽  
Author(s):  
Nasrin Kazem ◽  
Weiwei Xie ◽  
Saneyuki Ohno ◽  
Alexandra Zevalkink ◽  
Gordon J. Miller ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Zintl Phase

Enhancement of thermoelectric properties by Na doping in Te-free p-type AgSbSe2

2015 ◽  
Vol 44 (3) ◽  
pp. 1046-1051 ◽  
Author(s):  
Songting Cai ◽  
Zihang Liu ◽  
Jianyong Sun ◽  
Rui Li ◽  
Weidong Fei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Point Defects ◽  
Power Factor ◽  
Stacking Faults ◽  
Na Doping ◽  
P Type

Na substituting Sb in the AgSbSe2 not only improves the power factor caused by the enhanced carrier concentration, but also decreases the thermal conductivity due to point defects, nanoscale stacking faults and Na-rich precipitate. Consequently, a high ZT value of 0.92 is achieved in the AgSb0.99Na0.01Se2 sample.

High Temperature Thermoelectric Properties of Boron Carbide

1991 ◽  
Vol 234 ◽  
Author(s):  
T. L. Aselage
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Power Conversion ◽  
Unusual Structure ◽  
Thermally Activated ◽  
Structure And Bonding ◽  
Increasing Temperature ◽  
P Type ◽  
Very High

ABSTRACTBoron carbides are refractory solids with potential for application as very high temperature p-type thermoelectrics in power conversion applications. The thermoelectric properties of boron carbides are unconventional. In particular, the electrical conductivity is consistent with the thermally activated hopping of a high density (≈ 1021/cm3) of bipolarons; the Seebeck coefficient is anomalously large and increases with increasing temperature; and the thermal conductivity is surprisingly low. In this paper, these unusual properties and their relationship to the unusual structure and bonding present in boron carbides are reviewed. Finally, the potential for utilization of boron carbides at very high temperatures (up to 2200°C) and for preparing n-type materials is discussed.

Sign in / Sign up

Export Citation Format

Share Document