Ultralow thermal conductivity in tetrahydrofuran clathrate hydrate

2021 ◽  
Vol 119 (13) ◽  
pp. 133902
Author(s):  
Chengyang Yuan ◽  
Zhongyin Zhang ◽  
Jie Zhu ◽  
Jiafei Zhao ◽  
Lei Yang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Clathrate Hydrate

Clathrate and other solid phases in the tetrahydrofuran–water system: thermal conductivity and heat capacity under pressure

1982 ◽  
Vol 60 (7) ◽  
pp. 881-892 ◽  
Author(s):  
Russell G. Ross ◽  
Per Andersson
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Water System ◽  
Clathrate Hydrate ◽  
Transient Hot Wire ◽  
Guest Molecules ◽  
Hydrate Phase ◽  
Wire Method ◽  
Solid Phases ◽  
Thermal Conductivity Λ

Solid phases in the tetrahydrofuran–water (THF–H2O) system were investigated in the temperature range 100–260 K and at pressures up to 1.5 GPa. Thermal conductivity, λ, and heat capacity per unit volume, ρcp, were measured, using the transient hot-wire method. We made measurements on solid phases having nominal compositions THF•17H2O, THF•7•1H2O, and THF•4•6H2O, which we refer to as phases α, β, and γ, respectively. Phase α is known to be a structure II clathrate hydrate, and λ for this phase was found to be similar to other crystalline solids which are glass-like in relation to their thermal properties. Low-energy excitations are known to be relevant to the properties of glass-like solids, and, in the case of phase α, were probably rotational vibrations of the THF guest molecules. Phase β was similar, and we inferred that it was probably a structure I clathrate hydrate. Phase γ behaved nearly like a normal crystal phase at low temperatures, but λ became almost independent of temperature near melting. At 1.1 GPa and 130 K, we found evidence that phase α transformed, on pressurization, to a metastable modification which may be a new high-density form of clathrate hydrate. The astrophysical implications of our results were mentioned briefly.

Unusual PT dependence of thermal conductivity for a clathrate hydrate

Nature ◽  
1981 ◽  
Vol 290 (5804) ◽  
pp. 322-323 ◽  
Author(s):  
R. G. Ross ◽  
P. Andersson ◽  
G. Bäckström
Keyword(s):  
Thermal Conductivity ◽  
Clathrate Hydrate

scholarly journals Thermal conductivity of Xe clathrate hydrate at low temperatures

2006 ◽  
Vol 73 (6) ◽  
Author(s):  
A. I. Krivchikov ◽  
B. Ya. Gorodilov ◽  
O. A. Korolyuk ◽  
V. G. Manzhelii ◽  
O. O. Romantsova ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Low Temperatures ◽  
Clathrate Hydrate

THERMAL CONDUCTIVITY OF TETRAHYDROFURAN CLATHRATE HYDRATE

1987 ◽  
Vol 48 (C1) ◽  
pp. C1-565-C1-571 ◽  
Author(s):  
M. A. WHITE
Keyword(s):  
Thermal Conductivity ◽  
Clathrate Hydrate

HARDNESS AND THERMAL CONDUCTIVITY OF As-Se-Te CHALCOGENIDE GLASSES

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-931-C4-934 ◽  
Author(s):  
M. F. Kotkata ◽  
M.B. El-den
Keyword(s):  
Thermal Conductivity ◽  
Chalcogenide Glasses

A STUDY OF THE Pb PRECIPITATION IN NaCl FROM THERMAL CONDUCTIVITY EXPERIMENTS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-893-C6-895
Author(s):  
M. Locatelli ◽  
R. Suchail ◽  
E. Zecchi
Keyword(s):  
Thermal Conductivity
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