scholarly journals Absolute Seebeck coefficient of thin platinum films

2019 ◽  
Vol 126 (10) ◽  
pp. 105106 ◽  
Author(s):  
M. Kockert ◽  
R. Mitdank ◽  
A. Zykov ◽  
S. Kowarik ◽  
S. F. Fischer
Keyword(s):  
Seebeck Coefficient ◽  
Thin Platinum ◽  
Absolute Seebeck Coefficient

High-temperature thermoelectric properties of W-substituted CaMnO3

2013 ◽  
Vol 1490 ◽  
pp. 3-8 ◽  
Author(s):  
Dimas S. Alfaruq ◽  
James Eilertsen ◽  
Philipp Thiel ◽  
Myriam H Aguirre ◽  
Eugenio Otal ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Soft Chemistry ◽  
Absolute Seebeck Coefficient

AbstractThe thermoelectric properties of W-substituted CaMn1-xWxO3-δ (x = 0.01, 0.03; 0.05) samples, prepared by soft chemistry, were investigated from 300 K to 1000 K and compared to Nb-substituted CaMn0.98Nb0.02O3-δ. All compositions exhibit both an increase in absolute Seebeck coefficient and electrical resistivity with temperature. Moreover, compared to the Nb-substituted sample, the thermal conductivity of the W-substituted samples was strongly reduced. This reduction is attributed to the nearly two times greater mass of tungsten. Consequently, a ZT of 0.19 was found in CaMn0.97W0.03O3-δ at 1000 K, which was larger than ZT exhibited by the 2% Nb-doped sample.

scholarly journals Nanometrology: Absolute Seebeck coefficient of individual silver nanowires

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
M. Kockert ◽  
D. Kojda ◽  
R. Mitdank ◽  
A. Mogilatenko ◽  
Z. Wang ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Bulk Material ◽  
Silver Nanowires ◽  
Mean Free Path ◽  
Phonon Drag ◽  
Nanowire Diameter ◽  
The Absolute ◽  
Electron Mean Free Path ◽  
Absolute Seebeck Coefficient

AbstractThermoelectric phenomena can be strongly modified in nanomaterials. The determination of the absolute Seebeck coefficient is a major challenge for metrology with respect to micro- and nanostructures due to the fact that the transport properties of the bulk material are no more valid. Here, we demonstrate a method to determine the absolute Seebeck coefficient S of individual metallic nanowires. For highly pure and single crystalline silver nanowires, we show the influence of nanopatterning on S in the temperature range between 16 K and 300 K. At room temperature, a nanowire diameter below 200 nm suppresses S by 50% compared to the bulk material to less than S = 1 μVK−1, which is attributed to the reduced electron mean free path. The temperature dependence of the absolute Seebeck coefficient depends on size effects. Thermodiffusion and phonon drag are reduced with respect to the bulk material and the ratio of electron-phonon to phonon-phonon interaction is significantly increased.

Seebeck Coefficient of Heavily Doped Polycrystalline 3C-SiC Deposited by LPCVD

2012 ◽  
Vol 717-720 ◽  
pp. 541-544 ◽  
Author(s):  
Man I. Lei ◽  
Mehran Mehregany
Keyword(s):  
Thin Films ◽  
Seebeck Coefficient ◽  
Ambient Temperature ◽  
Temperature Increase ◽  
Room Temperature ◽  
Test Structure ◽  
Nitrogen Doped ◽  
Heavily Doped ◽  
The Absolute ◽  
Absolute Seebeck Coefficient

The Seebeck coefficient of heavily-nitrogen-doped n-type polycrystalline 3C-SiC (n-SiC) and platinum (Pt) thin films has been measured from room temperature up to 300 °C by using a microfabricated test structure. At room temperature, the absolute Seebeck coefficient of the n-SiC is -10 μV/°C. With ambient temperature increase, the absolute Seebeck coefficient of the n-SiC is found to gradually increase, reaching -20 μV/°C at 300 °C.

scholarly journals Blend Structure and n-Type Thermoelectric Performance of PA6/SAN and PA6/PMMA Blends Filled with Singlewalled Carbon Nanotubes

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1146
Author(s):  
Beate Krause ◽  
Alice Liguoro ◽  
Petra Pötschke
Keyword(s):  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Immiscible Blends ◽  
Seebeck Coefficients ◽  
Selective Localization ◽  
The Absolute ◽  
Pmma Blends ◽  
Absolute Seebeck Coefficient

The present study investigates how the formation of melt-mixed immiscible blends based on PA6/SAN and PA6/PMMA filled with single walled nanotubes (SWCNTs) affects the thermoelectric (TE) properties. In addition to the detailed investigation of the blend morphology with compositions between 100/0 wt.% and 50/50 wt.%, the thermoelectric properties are investigated on blends with different SWCNT concentrations (0.25–3.0 wt.%). Both PA6 and the blend composites with the used type of SWCNTs showed negative Seebeck coefficients. It was shown that the PA6 matrix polymer, in which the SWCNTs are localized, mainly influenced the thermoelectric properties of blends with high SWCNT contents. By varying the blend composition, an increase in the absolute Seebeck coefficient, power factor (PF), and figure of merit (ZT) was achieved compared to the PA6 composite which is mainly related to the selective localization and enrichment of SWCNTs in the PA6 matrix at constant SWCNT loading. The maximum PFs achieved were 0.22 µW/m·K2 for PA6/SAN/SWCNT 70/30/3 wt.% and 0.13 µW/m·K2 for PA6/PMMA/SWCNT 60/40/3 wt.% compared to 0.09 µW/m·K2 for PA6/3 wt.% SWCNT which represent increases to 244% and 144%, respectively. At higher PMMA or SAN concentration, the change from matrix-droplet to a co-continuous morphology started, which, despite higher SWCNT enrichment in the PA6 matrix, disturbed the electrical conductivity, resulting in reduced PFs with still increasing Seebeck coefficients. At SWCNT contents between 0.5 and 3 wt.% the increase in the absolute Seebeck coefficient was compensated by lower electrical conductivity resulting in lower PF and ZT as compared to the PA6 composites.

scholarly journals Precise measurement of absolute Seebeck coefficient from Thomson effect using ac-dc technique

AIP Advances ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 065312 ◽  
Author(s):  
Y. Amagai ◽  
T. Shimazaki ◽  
K. Okawa ◽  
H. Fujiki ◽  
T. Kawae ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Precise Measurement ◽  
Thomson Effect ◽  
Absolute Seebeck Coefficient

Direct Measurement of Absolute Seebeck Coefficient Using Graphene As a Zero Coefficient Reference

2020 ◽  
Vol MA2020-01 (10) ◽  
pp. 849-849
Author(s):  
Philippe Gagnon ◽  
Monique Tie ◽  
Pierre Lévesque ◽  
Maxime Biron ◽  
Benoit Cardin-St-Antoine ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Direct Measurement ◽  
Absolute Seebeck Coefficient
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