Chemical Composition, Density, Specific Gravity, Apparent Porosity, and Thermal Transport Properties of Volcanic Rocks in the Temperature Range 253 to 333 K

2003 ◽  
Vol 48 (5) ◽  
pp. 1310-1314 ◽  
Author(s):  
Asghari Maqsood ◽  
Muhammad Anis-ur-Rehman ◽  
Iftikhar Hussain Gul
Keyword(s):  
Chemical Composition ◽  
Specific Gravity ◽  
Transport Properties ◽  
Thermal Transport ◽  
Volcanic Rocks ◽  
Apparent Porosity ◽  
Temperature Range ◽  
Thermal Transport Properties

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

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

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.

DOPING EFFECTS ON THERMAL TRANSPORT PROPERTIES OF PEDOT

2018 ◽  
Author(s):  
Xiaoxiang Yu ◽  
Ruiyang Li ◽  
Takuma Shiga ◽  
Lei Feng ◽  
Junichiro Shiomi ◽  
...  
Keyword(s):  
Transport Properties ◽  
Thermal Transport ◽  
Thermal Transport Properties ◽  
Doping Effects
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