P-Type and N-Type Bi2Te3/PbTe Functional Gradient Materials for Thermoelectric Power Generation

2007 ◽  
pp. 1493-1496
Author(s):  
Kwang Yong Lee ◽  
Tae Sung Oh
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Gradient Materials ◽  
Thermoelectric Power Generation ◽  
Functional Gradient ◽  
P Type

P-Type and N-Type Bi2Te3/PbTe Functional Gradient Materials for Thermoelectric Power Generation

2007 ◽  
Vol 534-536 ◽  
pp. 1493-1496 ◽  
Author(s):  
Kwang Yong Lee ◽  
Tae Sung Oh
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Output Power ◽  
Hot Pressing ◽  
Gradient Material ◽  
Mechanically Alloyed ◽  
Gradient Materials ◽  
Functional Gradient ◽  
Functional Gradient Material ◽  
P Type

The p-type (Bi0.2Sb0.8)2Te3/(Pb0.7Sn0.3)Te functional gradient material (FGM) was fabricated by hot-pressing the mechanically alloyed (Bi0.2Sb0.8)2Te3 and the 0.5 at% Na2Te-doped (Pb0.7Sn0.3)Te powders. Also, the n-type Bi2(Te0.9Se0.1)3/PbTe FGM was processed by hot-pressing the mechanically alloyed Bi2(Te0.9Se0.1)3 and the 0.3 wt% Bi-doped PbTe powders. With △T larger than 300°C, the p-type (Bi0.2Sb0.8)2Te3/(Pb0.7Sn0.3)Te FGM exhibited larger thermoelectric output power than those of the (Bi0.2Sb0.8)2Te3 and the 0.5 at% Na2Te-doped (Pb0.7Sn0.3)Te alloys. For the n-type Bi2(Te0.9Se0.1)3/PbTe FGM, the thermoelectric output power superior to those of the Bi2(Te0.9Se0.1)3 and the 0.3 wt% Bi-doped PbTe was predicted at △T larger than 300°C.

Power generation performance of π-structure thermoelectric device using NaCo2O4 and Mg2Si elements

2013 ◽  
Vol 1490 ◽  
pp. 185-190 ◽  
Author(s):  
Tomoyuki Nakamura ◽  
Kazuya Hatakeyama ◽  
Masahiro Minowa ◽  
Youhiko Mito ◽  
Koya Arai ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Thermoelectric Properties ◽  
Waste Heat ◽  
Maximum Output Power ◽  
Magnesium Silicide ◽  
Thermoelectric Device ◽  
Maximum Output ◽  
Thermoelectric Power Generation ◽  
P Type

ABSTRACTThermoelectric power generation has been attracting attention as a technology for waste heat utilization in which thermal energy is directly converted into electric energy. It is well known that layered cobalt oxide compounds such as NaCo2O4 and Ca3Co4O9 have high thermoelectric properties in p-type oxide semiconductors. However, in most cases, the thermoelectric properties in n-type oxide materials are not as high. Therefore, n-type magnesium silicide (Mg2Si) has been studied as an alternative due to its non-toxicity, environmental friendliness, lightweight property, and comparative abundance compared with other TE systems. In this study, we fabricated π-structure thermoelectric power generation devices using p-type NaCo2O4 elements and n-type Mg2Si elements. The p- and n-type sintering bodies were fabricated by spark plasma sintering (SPS). To reduce the resistance at the interface between elements and electrodes, we processed the surface of the elements before fabricating the devices. The end face of a Mg2Si element was covered with Ni by SPS and that of a NaCo2O4 element was coated with Ag by silver paste and soldering.The thermoelectric device consisted of 18 pairs of p-type and n-type legs connected with Ag electrodes. The cross-sectional and thickness dimensions of the p-type elements were 3.0 mm × 5.0 mm × 7.6 mm (t) and those of the n-type elements were 3.0 mm × 3.0 mm × 7.6 mm (t). The open circuit voltage was 1.9 V and the maximum output power was 1.4 W at a heat source temperature of 873 K and a cooling water temperature of 283 K in air.

Broadening the optimum thermoelectric power generation range of p-type sintered Bi0.4Sb1.6Te3 by suppressing bipolar effect

2021 ◽  
Vol 426 ◽  
pp. 131853 ◽  
Author(s):  
Zhe Guo ◽  
Kun Song ◽  
Zipeng Yan ◽  
Peng Sun ◽  
Xiaojian Tan ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Thermoelectric Power Generation ◽  
P Type

Oxide-based thermoelectric power generation module using p-type Ca3Co4O9 and n-type (ZnO)7In2O3 legs

2011 ◽  
Vol 52 (1) ◽  
pp. 335-339 ◽  
Author(s):  
Soon-Mok Choi ◽  
Kyu-Hyoung Lee ◽  
Chang-Hyun Lim ◽  
Won-Seon Seo
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Thermoelectric Power Generation ◽  
P Type

Enhanced Thermoelectric Figure of Merit in P-Type DDy(Fe1-XCox)4Sb12

2011 ◽  
Vol 170 ◽  
pp. 240-243 ◽  
Author(s):  
Gerda Rogl ◽  
Andriy Grytsiv ◽  
Peter Rogl ◽  
Ernst Bauer ◽  
Michael Zehetbauer
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Figure Of Merit ◽  
High Efficiency ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Thermoelectric Power Generation ◽  
Temperature Range ◽  
P Type ◽  
Co Concentrations

Thermoelectric (TE) properties of skutterudites DDy(Fe1-xCox)4Sb12 for 0.2  x 0.3 were studied in the temperature range from 300 K to 800 K and compared with values for x = 0. Didymium (DD, 4.76 mass % Pr and 95.24 mass % Nd) was used as natural double filler. At Co-concentrations 0.225  x  0.25 maximum TE-performance was obtained with impressive power-factors (4.5 mW/mK2) and ZTs (ZT1.2 at 700 K). Furthermore these skutterudites maintain the high ZT over a broad temperature range providing an excellent p-leg for high-efficiency thermoelectric power generation.

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