Characterization of electrical conductivity of porous metal fiber sintered sheet using four-point probe method

2012 ◽  
Vol 37 ◽  
pp. 161-165 ◽  
Author(s):  
Wei Zhou ◽  
Yong Tang ◽  
Rong Song ◽  
Lelun Jiang ◽  
K.S. Hui ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Porous Metal ◽  
Probe Method ◽  
Metal Fiber

Characterization of three- and four-point bending properties of porous metal fiber sintered sheet

2014 ◽  
Vol 56 ◽  
pp. 522-527 ◽  
Author(s):  
Wei Zhou ◽  
Qinghui Wang ◽  
Weisong Ling ◽  
Liangzong He ◽  
Yong Tang ◽  
...  
Keyword(s):  
Porous Metal ◽  
Metal Fiber ◽  
Bending Properties ◽  
Four Point Bending

Synthesis and Characterization of Nanocomposite of Copolymer of N-Methyl Pyrrole (NMPy) and N, N-Dimethyl Aniline (NDMA)

2019 ◽  
pp. 124-129
Author(s):  
R. Rathore ◽  
Soni Sharma
Keyword(s):  
Electrical Conductivity ◽  
Surface Morphology ◽  
Oxidative Polymerization ◽  
Polymer Nanocomposite ◽  
Xrd Analysis ◽  
Probe Method ◽  
Synthesis And Characterization ◽  
Chemical Oxidative Polymerization ◽  
Amorphous Nature

Nanocomposite of copolymer of N-Methyl pyrrole (NMPy) and N, N-Dimethyl aniline (NDMA) doped with HCl was synthesized by chemical oxidative polymerization. APS was used as oxidant. The sample was characterized by FTIR, TGA, XRD and four probe method. FTIR confirms the formation of copolymer and its structure. XRD analysis shows the amorphous nature of polymer nanocomposite. The electrical conductivity of sample was measured by using four probe method. Size and surface morphology were demonstrated by SEM.

Fabrication and electrochemical characterization of carbon nanofibers by electrospinning with various MnO2 contents

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Duk-Rye Chang ◽  
Gi-Seok Heo
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Electrochemical Properties ◽  
Carbon Nanofibers ◽  
Electrochemical Characterization ◽  
Probe Method ◽  
Supercapacitor Applications ◽  
Scanning Electron

AbstractCarbon nanofibers were fabricated by electrospinning with various concentrations of MnO2, carbonization and activation processing for supercapacitor applications. Microstructure and electrochemical properties were characterized by scanning electron microscopy (SEM), the 4-point probe method, and a battery cycler system. It was observed that 8-20 wt.% MnO2/PAN nanofibers had 190- 260 nm diameters. The diameter decreased with increasing MnO2 concentration, but it increased for concentrations greater than 16 wt.%. The 16 wt.% MnO2 solution produced the nanofibers with the smallest diameter. The nanofibers showed capacitor characteristics when fabricated into electrodes, and their electrical conductivity and capacitance increased with increasing MnO2 concentration. The 20 wt.% MnO2/PAN carbon nanofibers showed the highest electrical conductivity value (2.82×10-3 S/cm) and the highest capacitance value (186.28 F/g), which indicates their potential for development of supercapacitor electrodes.

Effect of the structure of cellulose acetate membranes on their permeability, electrical conductivity and rejection

1990 ◽  
Vol 55 (12) ◽  
pp. 2933-2939 ◽  
Author(s):  
Hans-Hartmut Schwarz ◽  
Vlastimil Kůdela ◽  
Klaus Richau
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Water Flux ◽  
Cellulose Acetate Membrane ◽  
Structure Parameters ◽  
Dc Electrical Conductivity ◽  
Cellulose Acetate Membranes

Ultrafiltration cellulose acetate membrane can be transformed by annealing into reverse osmosis membranes (RO type). Annealing brings about changes in structural properties of the membranes, accompanied by changes in their permeability behaviour and electrical properties. Correlations between structure parameters and electrochemical properties are shown for the temperature range 20-90 °C. Relations have been derived which explain the role played by the dc electrical conductivity in the characterization of rejection ability of the membranes in the reverse osmosis, i.e. rRO = (1 + exp (A-B))-1, where exp A and exp B are statistically significant correlation functions of electrical conductivity and salt permeation, or of electrical conductivity and water flux through the membrane, respectively.

CHARACTERIZATION OF SPATIAL VARIABILITY OF SOIL ELECTRICAL CONDUCTIVITY AND CONE INDEX USING COULTER AND PENETROMETER-TYPE SENSORS

Soil Science ◽  
2006 ◽  
Vol 171 (8) ◽  
pp. 627-637 ◽  
Author(s):  
Jay David Jabro ◽  
Robert G. Evans ◽  
Yunseup Kim ◽  
William B. Stevens ◽  
William M. Iversen
Keyword(s):  
Electrical Conductivity ◽  
Spatial Variability ◽  
Soil Electrical Conductivity ◽  
Cone Index

Preparation and Characterization of Porous Si-Coated SiC Fiber Media

2004 ◽  
Vol 449-452 ◽  
pp. 233-236 ◽  
Author(s):  
Jun Suh Yu ◽  
B.S. Lee ◽  
Sung Churl Choi ◽  
Ji Hun Oh ◽  
Jae Chun Lee
Keyword(s):  
Electrical Conductivity ◽  
Silicon Content ◽  
Porous Si ◽  
Electrically Conductive ◽  
Electrode Distance ◽  
Sic Fiber ◽  
Effective Electrical Conductivity ◽  
The One ◽  
Fiber Preforms

Electrically conductive porous Si/SiC fiber media were prepared by infiltration of liquid silicon into porous carbon fiber preforms. The series rule of mixture for the effective electrical conductivity was applied to the disc shaped samples to estimate their silicon content, effective electrical conductivity and porosity. The electrical conductivity was estimated by assuming the disc sample as a plate of equivalent geometry, i.e., same thickness, electrode distance and volume. As the volumetric content of silicon in a sample increases from 0.026% to 0.97%, the estimated electrical conductivity increases from 0.17 S/cm to 2.09 S/cm. The porosity of the samples measured by Archimedes principle was in the range of 75~83% and 1~4% less than the one estimated by the series rule of mixture for the effective electrical conductivity.

scholarly journals MICROWAVE CHARACTERIZATION OF ELECTRICAL CONDUCTIVITY OF COMPOSITE CONDUCTORS BY HALF-WAVELENGTH COPLANAR RESONATOR

2016 ◽  
Vol 60 ◽  
pp. 73-80 ◽  
Author(s):  
Bilal Benarabi ◽  
Faouzi Kahlouche ◽  
Bernard Bayard ◽  
Anthony Chavanne ◽  
Jeremy Sautel
Keyword(s):  
Electrical Conductivity ◽  
Microwave Characterization ◽  
Half Wavelength ◽  
Composite Conductors
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