Thermoelectric properties of fine-grained sintered (Bi2Te3)25-(Sb2Te3)75 p-type solid solution

1995 ◽  
Vol 30 (3) ◽  
pp. 744-748 ◽  
Author(s):  
A. A. Joraide
Keyword(s):  
Solid Solution ◽  
Thermoelectric Properties ◽  
Fine Grained ◽  
P Type

Enhanced thermoelectric properties of p-type SnS0.2Se0.8 solid solution doped with Ag

2018 ◽  
Vol 745 ◽  
pp. 172-178 ◽  
Author(s):  
Asfandiyar ◽  
Zhiliang Li ◽  
Fu-Hua Sun ◽  
Huaichao Tang ◽  
Jin-Feng Dong ◽  
...  
Keyword(s):  
Solid Solution ◽  
Thermoelectric Properties ◽  
P Type

Thermoelectric properties of germanium telluride with fine-grained structure

2020 ◽  
Vol 11 ◽  
pp. 15-25
Author(s):  
L. D. Ivanova ◽  
◽  
Yu. V. Granatkina ◽  
I. Yu. Nikhezina ◽  
A. G. Malchev ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
High Energy ◽  
Grain Structure ◽  
Thermoelectric Efficiency ◽  
Fine Grained ◽  
Germanium Telluride ◽  
Fine Grained Structure ◽  
Properties Of Materials ◽  
P Type

The microstructure and thermoelectric properties of materials based on germanium telluride p-type conductivity doped with copper and bismuth obtained by hot pressing of three types powders prepared by grinding an ingot to a size of hundreds microns (0.315  mm) to hundreds of nanometers (mechanical activation) in planetary high-energy mill and melt spinning were investigated. The microstructure of the samples were analyzed by optical and electron scanning microscopies. The nanoscale grain structure of these samples was established. The thermoelectric characteristics of the materials: Seebeck coefficient, electrical and thermal conductivities, were measured both at room temperature and in the temperature range of 100 – 800 K. The slopes of these dependencies are estimated. The coefficient of thermoelectric figure of merit is calculated. The higher thermoelectric efficiency (ZT = 1.5 at 600 K) was received for the samples hot-pressed from granules, prepared by melt spinning.

Effect of Cobalt-Substitution on the Structure and Thermoelectric Properties of Chimney-Ladder Solid Solution (Mn1-xCox)Siγ (γ~ 1.7)

2010 ◽  
Vol 74 ◽  
pp. 22-25 ◽  
Author(s):  
Yuzuru Miyazaki ◽  
Yoshitsugu Saito ◽  
Kei Hayashi ◽  
Kunio Yubuta ◽  
Tsuyoshi Kajitani
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
Thermoelectric Properties ◽  
Valence Electron ◽  
Annealing Process ◽  
Axis Ratio ◽  
Cobalt Substitution ◽  
Valence Electrons ◽  
Unknown Factor ◽  
P Type

A partially cobalt-substituted solid solution of Nowotny chimney-ladder phase, (Mn1-xCox)Si􀀂, has been prepared using a tetra-arc-type furnace and a subsequent annealing process. The compounds consist of two tetragonal subsystems of [Mn1-xCox] and [Si], with an irrational c-axis ratio 􀀂 = cMn/cSi ~ 1.7. The crystal structure and thermoelectric properties of (Mn1-xCox)Si􀀂 solid solution were compared with those of the Fe-substituted solid solution, (Mn1-xFex)Si􀀂. In the case of Co-series, extra valence electrons are introduced relative to Fe-series, since the valence electron count is 3d74s2 for Co but 3d64s2 for Fe, respectively. It was naturally expected that the Feand Co-substituted MnSi􀀁 becomes n-type conductor from the p-type one at x > 0.23(5) and x > 0.06(1), respectively. Experimentally, the Fe-substituted samples become n-type at x > 0.28 but it is not the case for the Co-substituted ones. It is thus evident that there is an unknown factor which controls the thermoelectric properties of Co-substituted samples.

Thermoelectric properties of the Mg2Ge0.3Sn0.7 solid solution with p-type conductivity

2017 ◽  
Vol 51 (8) ◽  
pp. 1005-1008
Author(s):  
G. N. Isachenko ◽  
A. Yu. Samunin ◽  
V. K. Zaitsev ◽  
E. A. Gurieva ◽  
P. P. Konstantinov
Keyword(s):  
Solid Solution ◽  
Thermoelectric Properties ◽  
Type Conductivity ◽  
P Type

Synthesis, Crystal Structure and Thermoelectric Properties of β-K2Bi8Se13 Solid Solutions

2003 ◽  
Vol 793 ◽  
Author(s):  
Theodora Kyratsi ◽  
Duck Young Chung ◽  
Jeff S. Dyck ◽  
Ctirad Uher ◽  
Sangeeta Lal ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
High Temperature ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Band Gaps ◽  
Solid Solution Series ◽  
Type K ◽  
Type Character ◽  
P Type

ABSTRACTSolid solution series of the type K2Bi8-xSbxSe13, K2-xRbxBi8Se13 as well as K2Bi8Se13-xSx were prepared and the distribution of the atoms (Bi/Sb, K/Rb and Se/S) on different crystallographic sites, the band gaps and their thermoelectric properties were studied. The distribution Se/S appears to be more uniform than the distribution of the Sb and Rb atoms in the β-K2Bi8Se13 structure that shows preference in specific sites in the lattice. Band gap is mainly affected by Sb and S substitution. Seebeck coefficient measurements showed n-type character for of all Se/S members. In the Bi/Sb series an enhancement of p-type character was observed. The thermoelectric performance as well as preliminary high temperature measurements suggest the potential of these materials for high temperature applications.

Correlation of Microstructural Properties With Thermoelectric Performance of Bi0.5Sb1.5Te3 Films Fabricated by Electroplating

2010 ◽  
Vol 1267 ◽  
Author(s):  
Elena Koukharenko ◽  
Xiaohong Li ◽  
Jekaterina Kuleshova ◽  
Marcel Fowler ◽  
Nicole Frety ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Microstructural Properties ◽  
Fine Grained ◽  
Electrodeposited Film ◽  
P Type ◽  
First Time ◽  
Very High

AbstractThis study shows for the first time, the correlation between the microstructural properties (chemical composition and its homogeneity) and the thermoelectric properties for p-type Bi0.5Sb1.5Te3 electroplated films (10-15 μm thickness). High microstructural quality of Bi0.5Sb1.5Te3 electroplated films (a close to stoichiometry chemical composition with its high homogeneity elements distribution) was achieved by using an additive in the plating solution (sodium ligninsulfonate) as a surfactant agent. A fine-grained microstructure of 280 nm to 1μm has been observed for these materials, which half that of the plated films without a surfactant. The thermoelectric properties of electrodeposited Bi0.5Sb1.5Te3 films obtained without microstructural optimisation, show modest Seebeck coefficient values of 20-120 μm/K, electrodeposited film with an optimised microstructure exhibits very high values of Seebeck coefficient of 220-300 μm/K.

Thermoelectric properties of fine grained (75% Sb2Te3-25% Bi2Te3)p-type and (90% Bi2Te3-5% Sb2Te3-5% Sb2Se3)n-type alloys

1992 ◽  
Vol 27 (5) ◽  
pp. 1250-1254 ◽  
Author(s):  
F. A. A. Amin ◽  
A. S. S. Al-Ghaffari ◽  
M. A. A. Issa ◽  
A. M. Hassib
Keyword(s):  
Thermoelectric Properties ◽  
Fine Grained ◽  
P Type
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