scholarly journals Anomalous behavior of thermal conductivity at high temperatures for molecular crystals composed of flexible molecules

2019 ◽  
Vol 127 ◽  
pp. 151-157 ◽  
Author(s):  
Yuliia V. Horbatеnko ◽  
Olesia O. Romantsova ◽  
Oksana A. Korolyuk ◽  
Andrzej Jeżowski ◽  
Daria Szewczyk ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
High Temperatures ◽  
Molecular Crystals ◽  
Anomalous Behavior ◽  
Flexible Molecules

THEORY OF THERMAL CONDUCTIVITY IN MOLECULAR CRYSTALS, APPLICATION TO ALCALI CYANIDES

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-247-C6-249 ◽  
Author(s):  
W. Bauernfeind ◽  
J. Keller ◽  
U. Schröder
Keyword(s):  
Thermal Conductivity ◽  
Molecular Crystals

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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