Electrical Properties of Some Divalent Transition Cupferrone Complexes

1976 ◽  
Vol 31 (6) ◽  
pp. 675-676 ◽  
Author(s):  
H. F. Aly ◽  
F. M. Abdel-Kerim ◽  
H. H. Afifi
Keyword(s):  
Electrical Resistivity ◽  
Electrical Properties ◽  
Temperature Dependence ◽  
Uv Absorption ◽  
Cu And Zn

From the temperature dependence of the electrical resistivity of the divalent Mn, Co, Ni, Cu and Zn cupferrone complexes it is concluded that these compounds behave as semiconductors. It is also found that the charge transfere (CT) energy as calculated from the UV absorption CT bands is always larger than that drived from the electrical resistivity

Electrical properties of chain and sheet mercury compounds

1985 ◽  
Vol 314 (1528) ◽  
pp. 115-124 ◽  
Keyword(s):  
Electrical Resistivity ◽  
Electrical Properties ◽  
Fermi Surface ◽  
Temperature Dependence ◽  
Room Temperature ◽  
Layered Compounds ◽  
Surface Model ◽  
Helium Temperature ◽  
Mercury Compounds ◽  
Chain Compounds

The electrical resistivity of the chain compounds Hg 3-δ AsF 6 and Hg 3-δ SbF 6 decreases with decreasing temperature. It is shown that the temperature dependence of the resistivity of Hg 3-δ SbF 6 depends on the rate that a sample is cooled from room temperature to liquid helium temperature. The electrical resistivity of the layered compounds Hg 3 TaF 6 and Hg 3 NbF 6 is metallic from 300 to 1.4 K. The induced torque, de Haas-van Alphen effect and resistivity of the chain compounds are related to the cylindrical Fermi surface model. Superconductivity of the compounds is discussed.

TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

2014 ◽  
Vol 5 (3) ◽  
pp. 982-992 ◽  
Author(s):  
M AL-Jalali
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Low Temperatures ◽  
Noble Metals ◽  
Phonon Scattering ◽  
Theoretical Models ◽  
Residual Resistivity ◽  
Electron Phonon Scattering

Resistivity temperature – dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron – dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

scholarly journals Temperature Dependence of Mechanical, Electrical Properties and Crystal Structure of Polyethylene Blends for Cable Insulation

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1922 ◽  
Author(s):  
Lunzhi Li ◽  
Lisheng Zhong ◽  
Kai Zhang ◽  
Jinghui Gao ◽  
Man Xu
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Temperature Dependence ◽  
Elevated Temperatures ◽  
Breakdown Strength ◽  
Temperature Stability ◽  
Xrd Analysis ◽  
Insulation Material ◽  
Cable Insulation ◽  
Polyethylene Blends

There is a long-standing puzzle concerning whether polyethylene blends are a suitable substitution for cable-insulation-used crosslinking polyethylene (XLPE) especially at elevated temperatures. In this paper, we investigate temperature dependence of mechanical, electrical properties of blends with 70 wt % linear low density polyethylene (LLDPE) and 30 wt % high density polyethylene (HDPE) (abbreviated as 70 L-30 H). Our results show that the dielectric loss of 70 L-30 H is about an order of magnitude lower than XLPE, and the AC breakdown strength is 22% higher than XLPE at 90 °C. Moreover, the dynamic mechanical thermal analysis (DMA) measurement and hot set tests suggest that the blends shows optimal mechanical properties especially at high temperature with considerable temperature stability. Further scanning electron microscope (SEM) observation and X-ray diffraction (XRD) analysis uncover the reason for the excellent high temperature performance and temperature stability, which can be ascribed to the uniform fine-spherulite structure in 70 L-30 H blends with high crystallinity sustaining at high temperature. Therefore, our findings may enable the potential application of the blends as cable insulation material with higher thermal-endurance ability.

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