scholarly journals Study on the Thermophysical Properties and Electrical Conductivity of Iron-Carbon Binary Alloys

Netsu Bussei ◽  
1987 ◽  
Vol 1 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Kiyosi Kobayasi ◽  
Kazuo Nakatani ◽  
Yoshinori Fujimura
Keyword(s):  
Electrical Conductivity ◽  
Thermophysical Properties ◽  
Binary Alloys

Binary Alloys of 2,5-Disubstituted DCNQI Radical Anion Salts of Copper and Their Electrical Conductivity

1989 ◽  
Vol 28 (9) ◽  
pp. 1245-1246 ◽  
Author(s):  
Peter Erk ◽  
Siegfried Hünig ◽  
Hubert Meixner ◽  
Hans-Jörg Gross ◽  
Uwe Langohr ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Radical Anion ◽  
Binary Alloys

scholarly journals Measurement and study of thermophysical properties of nanofluids with carbon nanotubes

2021 ◽  
Vol 2119 (1) ◽  
pp. 012117
Author(s):  
V Ya Rudyak ◽  
G R Dashapilov ◽  
A A Shupik
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Thermophysical Properties ◽  
Weight Concentration ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Single Walled Cnts ◽  
Walled Cnts

Abstract This article is devoted to the study of the thermophysical properties of nanofluids with single-walled and multi-walled carbon nanotubes (CNT). Their weight concentration varied from 0.05 to 0.2%. Nanofluids, based on ethylene glycol and water, were studied. Dispersants were also used. The diffusion of CNT had been systematically investigated by the method of dynamic light scattering and their effective hydrodynamic dimensions were determined. The rheology and viscosity of all nanofluids were studied. It is shown that nanofluids are either pseu-doplastic or viscoplastic. Their rheology changes with increasing CNT concentration and temperature. However, in all cases, the viscosity of nanofluids with single-walled CNTs is signifi-cantly higher than that of nanofluids with multi-walled CNTs. In the last part, the electrical conductivity of all these nanofluids and the dispersants effect on it are investigated.

Experimental Measurement of Thermophysical Properties of Alumina- MWCNTs/Salt–Water Hybrid Nanofluids

2020 ◽  
Vol 16 (5) ◽  
pp. 734-747 ◽  
Author(s):  
Amir Hossein Sharifi ◽  
Iman Zahmatkesh ◽  
Fatemeh F. Bamoharram ◽  
Amir Hossein Shokouhi Tabrizi ◽  
Safieh Fazel Razavi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Salt Concentration ◽  
Thermophysical Properties ◽  
Base Fluid ◽  
Volume Fraction ◽  
Ph Value ◽  
Nanoparticle Volume Fraction ◽  
Optimal Conditions ◽  
Hybrid Nanofluids

Background: Hybrid nanofluids are considered as an extension of conventional nanofluids which are prepared through suspending two or more nanoparticles in the base fluids. Previous studies on hybrid nanofluids have measured their thermal conductivity overlooking other thermophysical properties such as viscosity and electrical conductivity. Objective: An experimental investigation is undertaken to measure thermal conductivity, viscosity, and electrical conductivity of a hybrid nanofluid prepared through dispersing alumina nanoparticles and multiwall carbon nanotubes in saltwater. These properties are the main important factors that must be assessed before performance analysis for industrial applications. Methods: The experimental data were collected for different values of the nanoparticle volume fraction, temperature, salt concentration, and pH value. Attention was paid to explore the consequences of these parameters on the nanofluid’s properties and to find optimal conditions to achieve the highest value of the thermal conductivity and the lowest values of the electrical conductivity and the viscosity. Results: The results demonstrate that although the impacts of the pH value and the nanoparticle volume fraction on the nanofluid’s thermophysical properties are not monotonic, optimal conditions for each of the properties are reachable. It is found that the inclusion of the salt in the base fluid may not change the thermal conductivity noticeably. However, a considerable reduction in the viscosity and substantial elevation in the electrical conductivity occur with an increase in the salt concentration. Conclusion: With the addition of salt to a base fluid, the thermophysical properties of a nanofluid can be controlled.

scholarly journals Thermophysical properties of some liquid binary Mg-based alloys

2017 ◽  
Vol 53 (3) ◽  
pp. 279-284
Author(s):  
Y. Plevachuk ◽  
V. Sklyarchuk ◽  
G. Pottlacher ◽  
A. Yakymovych ◽  
O. Tkach
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Thermoelectric Power ◽  
Thermophysical Properties ◽  
Point Contact ◽  
Calculated Data ◽  
Contact Method ◽  
Concentric Cylinder ◽  
Cast Alloys ◽  
Cylinder Method

In this study, some structure-sensitive thermophysical properties, namely, electrical conductivity, thermal conductivity and thermoelectric power of liquid binary alloys Al33.3Mg66.7, Mg47.6Zn52.4 and Mg33.3Zn66.7 (all in wt.%), as the most promising cast alloys to fabricate components for cars, aircraft and other complex engineering products, were investigated. The electrical conductivity and thermoelectric power were measured in a wide temperature range by the four-point contact method. The thermal conductivity was measured by the steady-state concentric cylinder method. The obtained results are compared with literature experimental and calculated data.

Thermophysical properties of Hg0.8Cd0.2Te melt: Density, electrical conductivity and viscosity

2005 ◽  
Vol 351 (14-15) ◽  
pp. 1179-1184 ◽  
Author(s):  
C. Li ◽  
R.N. Scripa ◽  
H. Ban ◽  
B. Lin ◽  
C.-H. Su ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermophysical Properties ◽  
Melt Density
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