Thermal conductivity of the single-crystal monoisotopic 29Si in the temperature range 2.4–410 K

2013 ◽  
Vol 55 (1) ◽  
pp. 235-239 ◽  
Author(s):  
A. V. Inyushkin ◽  
A. N. Taldenkov ◽  
A. V. Gusev ◽  
A. M. Gibin ◽  
V. A. Gavva ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
Temperature Range

Thermal Conductivity of Single-Crystal ZrO2-Based Solid Solutions Stabilized with Scandium and Yttrium Oxides in the Temperature Range 50–300 K

2018 ◽  
Vol 60 (12) ◽  
pp. 2672-2677
Author(s):  
M. A. Borik ◽  
A. V. Kulebyakin ◽  
E. E. Lomonova ◽  
V. A. Myzina ◽  
P. A. Popov ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
Solid Solutions ◽  
Temperature Range

scholarly journals Влияние морфологических дефектов на теплофизические свойства gamma-Gd-=SUB=-2-=/SUB=-S-=SUB=-3-=/SUB=-

2018 ◽  
Vol 60 (3) ◽  
pp. 482
Author(s):  
А.В. Сотников ◽  
В.В. Баковец ◽  
А.Ш. Агажанов ◽  
С.В. Станкус ◽  
Д.П. Пищур ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Single Crystal ◽  
Temperature Range ◽  
Ceramic Samples ◽  
Temperature Dependences ◽  
Morphological Defects ◽  
Large Heat

AbstractThe temperature dependences of the heat capacity ( C _ p ) and the thermal conductivity (κ) in the temperature range from 300 to 773 K of polycrystalline gadolinium sulfide samples (γ-GdS_ y ) with the deviation of the composition from the integer stoichiometric were studied. It was found that the thermal conductivity of gadolinium sulfides decreases monotonically and reaches 0.74 W/(m K) at T = 773 K for the composition y = 1.479, which is much lower than for the known single-crystal samples. The influence of morphological defects (boundaries of crystallites and dislocations) on the intensity of scattering of phonons is studied. It has been established that ceramic samples of gadolinium sulphides have a large heat capacity and a lower thermal conductivity, in comparison with monocrystalline samples of the same composition.

scholarly journals Теплопроводность монокристаллов твердых растворов на основе ZrO-=SUB=-2-=/SUB=-, солегированных оксидами скандия, церия и иттрия

2019 ◽  
Vol 61 (12) ◽  
pp. 2390
Author(s):  
М.А. Борик ◽  
А.В. Кулебякин ◽  
И.Е. Курицына ◽  
Е.Е. Ломонова ◽  
В.А. Мызина ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Phase Composition ◽  
Single Crystal ◽  
Solid Solutions ◽  
Defective Structure ◽  
Temperature Range

Abstract The thermal conductivity of single-crystal solid solutions (ZrO_2)_1 – _ x  _– _ y  _– _ z (Sc_2O_3)_ x (CeO_2)_ y (Y_2O_3)_ z ( x = 0.08–0.10; y = 0.005–0.01; z = 0–0.005) was measured in the temperature range 50–300 K. Phase composition and defective structure of crystals were studied.

Thermal conduction in normal and superconducting tin and indium

1961 ◽  
Vol 262 (1310) ◽  
pp. 420-434 ◽  
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
Normal State ◽  
Thermal Conduction ◽  
Impurity Scattering ◽  
Simple Expression ◽  
Temperature Range ◽  
Lattice Resistance ◽  
Theory Of Superconductivity ◽  
Made In

A study of the thermal conductivity of single crystal specimens of pure tin and indium has been made in the temperature range 2 to 4·2 C K in both the normal and superconducting states. Values of the normal state thermal conductivity, corrected for magnetoresistance, fitted well the expression 1/ K = α T 2 + β/ T , although deviations from this formula were observed in the purest specimens. Serious departures from Matthiessen’s rule occurred, however, in that the magnitude of the lattice resistance (α T 2 ) depended strongly on purity. Systematic variations in the ratio of conductivities K g K n with purity were found to follow the simple expression suggested by Hulm. The limiting curves for K sIKn (in the cases of all impurity scattering, and of all lattice scattering of electrons) are compared with recent calculations on the Bardeen-Cooper-Schrieffer theory of superconductivity.

Thermal conductivity of single-crystal ZrO2-Y2O3 solid solutions in the temperature range 50–300 K

2012 ◽  
Vol 54 (3) ◽  
pp. 658-661 ◽  
Author(s):  
P. A. Popov ◽  
V. D. Solomennik ◽  
E. E. Lomonova ◽  
M. A. Borik ◽  
V. A. Myzina
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
Solid Solutions ◽  
Temperature Range

Structure and Thermoelectric Properties of New Quaternary Tin and Lead Bismuth Selenides, K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1+xSn5-xBi11+xSe22

2000 ◽  
Vol 626 ◽  
Author(s):  
Antje Mrotzek ◽  
Kyoung-Shin Choi ◽  
Duck-Young Chung ◽  
Melissa A. Lane ◽  
John R. Ireland ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
Thermoelectric Properties ◽  
Three Dimensional ◽  
Structure Type ◽  
Narrow Gap ◽  
Low Thermal Conductivity ◽  
Seebeck Coefficients ◽  
Metal Atoms ◽  
Anionic Framework

ABSTRACTWe present the structure and thermoelectric properties of the new quaternary selenides K1+xM4–2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22. The compounds K1+xM4-2xBi7+xSe15 (M= Sn, Pb) crystallize isostructural to A1+xPb4-2xSb7+xSe15 with A = K, Rb, while K1-xSn5-xBi11+xSe22 reveals a new structure type. In both structure types fragments of the Bi2Te3-type and the NaCl-type are connected to a three-dimensional anionic framework with K+ ions filled tunnels. The two structures vary by the size of the NaCl-type rods and are closely related to β-K2Bi8Se13 and K2.5Bi8.5Se14. The thermoelectric properties of K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22 were explored on single crystal and ingot samples. These compounds are narrow gap semiconductors and show n-type behavior with moderate Seebeck coefficients. They have very low thermal conductivity due to an extensive disorder of the metal atoms and possible “rattling” K+ ions.

Measurement of apparent thermal conductivity of regenerator materials in 4-20 K temperature range

Cryogenics ◽  
2021 ◽  
pp. 103300
Author(s):  
Yang Biao ◽  
Xi Xiaotong ◽  
Liu Xuming ◽  
Xu Xiafan ◽  
Chen Liubiao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Temperature Range ◽  
Apparent Thermal Conductivity

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.

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