scholarly journals Electronic thermal conductivity at high temperatures: Violation of the Wiedemann-Franz law in narrow-band metals

2006 ◽  
Vol 74 (23) ◽  
Author(s):  
K. Vafayi ◽  
M. Calandra ◽  
O. Gunnarsson
Keyword(s):  
Thermal Conductivity ◽  
High Temperatures ◽  
Narrow Band ◽  
Electronic Thermal Conductivity

scholarly journals The Lattice Component of the Thermal Conductivity of Metals and Alloys

1954 ◽  
Vol 7 (1) ◽  
pp. 57 ◽  
Author(s):  
PG Klemens
Keyword(s):  
Thermal Conductivity ◽  
High Temperatures ◽  
Low Temperatures ◽  
Metals And Alloys ◽  
Transverse Lattice ◽  
Conduction Electrons ◽  
Electronic Thermal Conductivity ◽  
Lattice Waves ◽  
Lattice Component

Makinson's (1938) theory of the lattice component of the thermal conductivity of metals and alloys, when limited at low temperatures by interaction with the conduction electrons, is re-examined, and the magnitude of the lattice conductivity is related to the electronic thermal conductivity at low temperatures, thus avoiding uncertainties in the theory at high temperatures. The result depends on whether transverse lattice waves can interact with the electrons.

Effects of Nb doping on thermoelectric properties of Zn4Sb3 at high temperatures

2009 ◽  
Vol 24 (2) ◽  
pp. 430-435 ◽  
Author(s):  
D. Li ◽  
H.H. Hng ◽  
J. Ma ◽  
X.Y. Qin
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
High Temperatures ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Temperature Range ◽  
A Value ◽  
Nb Doping ◽  
Thermal Conductivities

The thermoelectric properties of Nb-doped Zn4Sb3 compounds, (Zn1–xNbx)4Sb3 (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb-doped compounds were lower than that of the pristine β-Zn4Sb3. Among the compounds studied, the lightly substituted (Zn0.995Nb0.005)4Sb3 compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn4Sb3 compound for the temperature range investigated. In particular, the ZT of (Zn0.995Nb0.005)4Sb3 reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn4Sb3 obtained in this study.

ON MEASUREMENT OF THERMAL CONDUCTIVITY AT HIGH TEMPERATURES

1961 ◽  
Vol 39 (7) ◽  
pp. 1029-1039 ◽  
Author(s):  
M. J. Laubitz
Keyword(s):  
Thermal Conductivity ◽  
Heat Flow ◽  
High Temperatures ◽  
Mathematical Analysis ◽  
Temperature Range ◽  
Linear Heat ◽  
Flow Systems

A method is given for exact mathematical analysis of linear heat flow systems used in measuring thermal conductivity at high temperatures. It is shown that a popular version of such a system is very sensitive to the alignment of its components, which seriously limits the temperature range of its satisfactory use.

Thermal Conductivity of Sintered UO, and Al2O3 at High Temperatures

1965 ◽  
Vol 48 (1) ◽  
pp. 31-34 ◽  
Author(s):  
TORAJI NISHIJIMA ◽  
TOSHIYUKI KAWADA ◽  
AKIRA ISHIHATA
Keyword(s):  
Thermal Conductivity ◽  
High Temperatures
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