Study of mechanical and thermal transport properties of Cis- and Trans-polyisoprene blends in low temperature range

2014 ◽  
Author(s):  
Mahesh Baboo ◽  
Kananbala Sharma ◽  
N. S. Saxena
Keyword(s):  
Low Temperature ◽  
Transport Properties ◽  
Thermal Transport ◽  
Temperature Range ◽  
Thermal Transport Properties ◽  
Cis And Trans

Thermal transport properties of granites in the temperature range 253–333 K

2004 ◽  
Vol 37 (9) ◽  
pp. 1405-1409 ◽  
Author(s):  
Asghari Maqsood ◽  
Iftikhar Hussain Gul ◽  
M Anis-ur-Rehman
Keyword(s):  
Transport Properties ◽  
Thermal Transport ◽  
Temperature Range ◽  
Thermal Transport Properties

Low-Temperature Thermodynamic and Thermal-Transport Properties of Decagonal Al65Cu20Co15

1996 ◽  
Vol 77 (6) ◽  
pp. 1071-1074 ◽  
Author(s):  
K. Edagawa ◽  
M. A. Chernikov ◽  
A. D. Bianchi ◽  
E. Felder ◽  
U. Gubler ◽  
...  
Keyword(s):  
Low Temperature ◽  
Transport Properties ◽  
Thermal Transport ◽  
Thermal Transport Properties

Evidence of a Order-Disorder Transition in the Crystalline Phase of Cd6Yb, 1/1 cubic approximant of icosahedral Cd 5.7 Yb

2003 ◽  
Vol 793 ◽  
Author(s):  
N. Sorloaica ◽  
A. L. Pope ◽  
D. W. Winkler ◽  
Terry M. Tritt ◽  
V. Keppens ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Temperature Dependence ◽  
Transport Properties ◽  
Crystalline Phase ◽  
Thermal Transport ◽  
Hysteretic Behavior ◽  
Disorder Transition ◽  
Temperature Range ◽  
Thermal Transport Properties

ABSTRACTThe electrical and thermal transport properties (electrical resistivity, thermopower, heat capacity and thermal conductivity) of the crystalline phase of the binary Cd6Yb system has been measured over a temperature range from 10 K to 300 K. Evidence for a phase transition in Cd6Yb is observed in the electrical transport properties with distinct changes in the temperature dependence of the resistivity and thermopower around T ≈ 110K. An anomaly in the heat capacity and a thermal conductivity is also observed at this same temperature. Hysteretic behavior is not evident in the temperature dependence of any of the electrical and thermal transport properties. In addition, the elastic properties using resonant ultrasound (RUS) techniques have been investigated over a similar temperature range. A large “resonance dip” is observed in the RUS data at T ≈ 110K, which is indicative of some type of structural change in the crystalline material at this temperature. These data will be presented and discussed in context of the undergoes reversible order-disorder transition in the 1/1 cubic approximant at about 110 K, which makes the system very interesting compared to the quasicrystal phase Cd5.7Yb

scholarly journals Thermal Transport of Flexural and In-Plane Phonons Modulated by Bended Graphene Nanoribbons

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Changning Pan ◽  
Jun He ◽  
Diwu Yang ◽  
Keqiu Chen
Keyword(s):  
Low Temperature ◽  
Transport Properties ◽  
Thermal Transport ◽  
Phonon Dispersion ◽  
Graphene Nanoribbons ◽  
Structural Parameters ◽  
Thermal Conductance ◽  
Phonon Modes ◽  
Thermal Transport Properties ◽  
Out Of Plane

Ballistic thermal transport properties are investigated comparatively for out-of-plane phonon modes (FPMs) and in-plane phonon modes (IPMs) in bended graphene nanoribbons (GNRs). Results show that the phonon modes transports can be modulated separately by the phonon dispersion mismatch between armchair and zigzag GNRs in considered system. The contribution of FPMs to total thermal conductance is larger than 50% in low temperature for perfect GNRs. But it becomes less than 20% in the bended GNRs. Furthermore, this contribution can be modulated by changing the structural parameters of the bended GNRs. The result is useful for the design of thermal or thermoelectric nanodevices in future.

Atomistic Simulations of Heat Transport in Carbon Nanotubes Effected by Temperature and Stretch Strain

2011 ◽  
Vol 320 ◽  
pp. 38-44 ◽  
Author(s):  
Qing Yuan Meng ◽  
Yu Fei Gao ◽  
Xian Qin
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Low Temperature ◽  
Transport Properties ◽  
Thermal Transport ◽  
Phonon Scattering ◽  
Quantum Effect ◽  
Axial Strain ◽  
Thermal Transport Properties ◽  
Dynamic Structures

Carbon nanotubes (CNTs) is a well thermal transport nano materials, however, the thermal conductivity of CNTs has not been well established, only a few groups had reported experimental data and the existed simulation results ranged widely. Specially, the conclusions in low temperature section and dynamic structures were not very clearly. In this paper, the methods based on phonon scattering theory were applied to explore the thermal transport properties CNTs. The investigation was carried out under the conditions of temperature and axial strain. In the consideration of quantum effect, the thermal conductivity increased linearly with the growth of temperature in low-temperature section, and began to decrease gradually when the temperature exceeded a definite value. If an axial strain was concerned, there was an increasing trend of thermal conductivity as the stretch strain increases. However, after the strain exceeded a particular value the thermal conductivity decreased significantly. In addition, the high frequency phonon peak in PDOS was found to be an important parameter in describing thermal transport properties of dynamic structures.

Potential Of Quasicrystals And Quasicrystalline Approximants For Utilization In Small Scale Thermoelectric Refrigeration And Power Generation Applications

1998 ◽  
Vol 553 ◽  
Author(s):  
Terry M. Trrit ◽  
A. L. Pope ◽  
M. Chernikov ◽  
M. Feuerbacher ◽  
S. Legault ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Power Generation ◽  
Transport Properties ◽  
Thermal Transport ◽  
Small Scale ◽  
Conductivity Measurements ◽  
Temperature Range ◽  
Annealing Conditions ◽  
Thermal Transport Properties ◽  
Thermoelectric Refrigeration

AbstractWe have identified quasicrystals and quasicrystalline approximants as potential candidates for small scale thermoelectric power generation and refrigeration applications. A number of quasicrystalline systems have been investigated, however, the focus in this paper will be on the ALPdMn (typically Al70Pd20Mn10) system. Currently, we are systematically investigating the electrical and thermal transport properties of the AlPdMn quasicrystalline system in relation to differing sample composition, systematic addition of impurities, and different annealing conditions. Several different preparation techniques have been employed in order to determine optimal techniques for maximizing the thermal and electrical properties of this quasicrystalline system for possible thermoelectric applications. Resistivity and thermopower have been performed over a temperature range between 5K and 320K. Thermal conductivity measurements have been performed over a temperature range between 20K and 300K. In the pure, single phase nominally Al70Pd20Mn10 we have observed thermopower values as high as +85 μV/K around room temperature with resistivity values of 1.5 mΩ-cm. Thermal conductivity measurements yield values less than 3 W/m-K. We will discuss how these properties are affected by the parameters we have varied and the trends we have observed so far. We will discuss the future investigations of the electrical and thermal transport properties of quasicrystals in relation to potential thermoelectric applications.

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