Rapid Synthesis of Bi Substituted Ca3Co4O9 by a Polyacrylamide Gel Method and its High-Temperature Thermoelectric Power Factor

2010 ◽  
Vol 434-435 ◽  
pp. 393-396 ◽  
Author(s):  
Ying Song ◽  
Qiu Sun ◽  
Li Rong Zhao ◽  
Fu Ping Wang
Keyword(s):  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Solid State Reaction Method ◽  
Polyacrylamide Gel ◽  
Measured Temperature ◽  
Thermoelectric Power Factor ◽  
Gel Method ◽  
Plasma Sintering ◽  
Polyacrylamide Gel Method

A series of polycrystalline (Ca1-xBix)3Co4O9 ( x = 0.0 ~ 0.075 ) powders were synthesized rapidly by a polyacrylamide gel method. The dense ceramics were fabricated using the spark plasma sintering ( SPS ) technique. Effects of Bi substitution on high temperature thermoelectric properties of Ca3Co4O9 were evaluated. Both the electrical conductivity and Seebeck coefficient increased with increasing Bi content up to x = 0.05, thus leading to an enhanced thermoelectric power factor. The Bi substituted sample with x = 0.05 obtained in this study has the highest thermoelectric power factor in the measured temperature range. It reaches 4.810-4 Wm-1K-2 at 700 °C, which is 26 % higher than that of Ca3Co4O9 without Bi substitution, and is by up to 15 % larger as compared to the Bi substituted sample synthesized by the solid state reaction method and the SPS technique due to the high chemical homogeneous powder prepared by the polyacrylamide gel method.

Thermoelectric Power Factor of Polycrystalline La0.75Sr0.25Co1-xMnxO3-δCeramics

2009 ◽  
Vol 1166 ◽  
Author(s):  
Julio E. Rodríguez ◽  
J. A. Niño
Keyword(s):  
Transport Properties ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Manganese Content ◽  
Solid State Reaction Method ◽  
Measured Temperature ◽  
Thermoelectric Power Factor ◽  
Temperature Range

AbstractThermoelectric properties of polycrystalline La0.75Sr0.25Co1-xMnxO3-δ(0<x<0.08) (LSCoO-Mn) compounds have been studied. The samples were grown by solid-state reaction method; their transport properties were studied in the temperature range between 100 and 290K, as a function of temperature and the manganese content. The Seebeck coefficient (S) is positive over the measured temperature range and its magnitude increases with the manganese content up to values close to 160 μV/K. The electrical resistivity (ρ) goes from metallic to semiconducting behavior as the Mn level increases, at room temperature, ρ(T) exhibit values less than 4mΩ-cm. From S(T), ρ(T) and κ(T) data, the thermoelectric power factor and the figure of merit were determined. These performance parameters reach maximum values around 18 μW/K2-cm and 0.2, respectively. The observed behavior in the transport properties become these compounds potential thermoelectric materials, which could be used in thermoelectric applications.

Facile synthesis of morphology-controlled La:BaSnO3 for the enhancement of thermoelectric power factor

CrystEngComm ◽  
2020 ◽  
Vol 22 (32) ◽  
pp. 5363-5374 ◽  
Author(s):  
Palani Rajasekaran ◽  
Mukannan Arivanandhan ◽  
Yuki Kumaki ◽  
Ramasamy Jayavel ◽  
Yasuhiro Hayakawa ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Oxide Materials ◽  
Facile Synthesis ◽  
Thermoelectric Power Factor

Donor-doped BaSnO3 (BSO) ceramics are promising n-type oxide materials for high-temperature thermoelectric applications.

Enhancement of thermoelectric power factor in NaxCoO2/Au multilayers

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 57148-57152 ◽  
Author(s):  
Xiaohui Zhao ◽  
Haifeng Wang ◽  
Shufang Wang ◽  
Dogheche Elhadj ◽  
Jianglong Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor ◽  
Post Annealing ◽  
Au Thin Film

NaxCoO2/Au thin film multilayers, with a thickness of the Au layer of 0.5–12 nm, have been fabricated on c-Al2O3 by post annealing of the CoO/Au thin film multilayers in Na vapor at high temperature in air.

scholarly journals Large Enhancements in the Thermoelectric Power Factor of Bulk PbTe at High Temperature by Synergistic Nanostructuring

2008 ◽  
Vol 120 (45) ◽  
pp. 8746-8750 ◽  
Author(s):  
Joseph R. Sootsman ◽  
Huijun Kong ◽  
Ctirad Uher ◽  
Jonathan James D'Angelo ◽  
Chun-I Wu ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor

Synthesis and thermoelectric power factor of LSCO perovskites

2005 ◽  
Vol 886 ◽  
Author(s):  
Julio E. Rodriguez
Keyword(s):  
Electrical Resistivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Room Temperature ◽  
Morphological Properties ◽  
Measured Temperature ◽  
X Ray Diffraction ◽  
Thermoelectric Power Factor ◽  
X Ray

ABSTRACTMeasurements of Seebeck coefficient, S(T) and electrical resistivity, ρ(T) on polycrystalline La2−xSrxCuO4+d(LSCO) (0<x≤0.2) samples are reported. The Seebeck coefficient is positive in whole measured temperature range (77K and 300K) and it decreases with Sr content. At room temperature S(T) changes from 400 μ/K for the samples with the lowest levels of Sr to 30 μV/K for the samples with the highest Sr levels. The behavior of S(T) fits to Heikes model, which describes the behavior of Seebeck coefficient in systems where the correlated hopping is present. With the Sr content, the electrical resistivity changes its behavior from semiconducting to metallic and it took values from 2.4 to 10−3Ωcm. From S(T) and rho(T) measurements the thermoelectric power factor, PF was obtained. The maximum values for PF were about 5 μW/K2cm in the samples where x= 0.03, which are comparable to the typical values for conventional thermoelectric semiconductors. The structural and morphological properties of the samples were studied by x-ray diffraction analysis and Scanning Electron Microscopy (SEM) respectively. The behavior of transport properties opens de possibility of considering this family of perovskite-compounds as a thermoelectric material which works below room temperature.

scholarly journals Improved thermoelectric power factor and conversion efficiency of perovskite barium stannate

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 32703-32709 ◽  
Author(s):  
Jun Li ◽  
Zuju Ma ◽  
Rongjian Sa ◽  
Kechen Wu
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Thermoelectric Power ◽  
Conduction Band ◽  
Conversion Efficiency ◽  
Power Factor ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Thermoelectric Power Factor ◽  
Barium Stannate

The highly dispersive conduction band and high temperature stability contribute to the excellent electrical properties when BaSnO3 is n-type doped.

ChemInform Abstract: Large Enhancements in the Thermoelectric Power Factor of Bulk PbTe at High Temperature by Synergistic Nanostructuring.

ChemInform ◽  
2009 ◽  
Vol 40 (3) ◽  
Author(s):  
Joseph R. Sootsman ◽  
Huijun Kong ◽  
Ctirad Uher ◽  
Jonathan James D'Angelo ◽  
Chun-I Wu ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor

scholarly journals Large Enhancements in the Thermoelectric Power Factor of Bulk PbTe at High Temperature by Synergistic Nanostructuring

2008 ◽  
Vol 47 (45) ◽  
pp. 8618-8622 ◽  
Author(s):  
Joseph R. Sootsman ◽  
Huijun Kong ◽  
Ctirad Uher ◽  
Jonathan James D'Angelo ◽  
Chun-I Wu ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor
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