Electrical properties of plastic composites using Br2-intercalated vapor-grown carbon fibers as a conductive filler

1994 ◽  
Vol 9 (7) ◽  
pp. 1829-1833 ◽  
Author(s):  
M. Katsumata ◽  
M. Endo ◽  
H. Yamanashi ◽  
H. Ushijima
Keyword(s):  
Electrical Properties ◽  
Carbon Fibers ◽  
Room Temperature ◽  
Conductive Filler ◽  
Plastic Composite ◽  
Plastic Composites ◽  
Liquid Bromine ◽  
Degree Of Stability ◽  
High Degree ◽  
Powder Resistivity

Graphite fiber intercalation compounds were prepared by immersing graphitized thin vapor-grown carbon fibers (VGCF's) with diameters less than 0.5 μm into liquid bromine. The composition of Br2-intercalated VGCF was C70Br-C90Br. The powder resistivity of Br2-intercalated VGCF was estimated as 1/3 of pristine VGCF. An electroconductive plastic composite was prepared by mixing phenol resin with that of bromine intercalated VGCF as a conductive filler, and its electrical properties were investigated. The resistivity of a Br2-intercalated VGCF composite was 1.1 × 10−2 Ω · cm at room temperature, which is about 50% of pristine VGCF composite. Br2-intercalated VGCF-based composite had a high degree of stability against exposure at 150 °C in air and at 85 °C with 90% humidity for 500 h. Br2-intercalated VGCF-based plastic composites could be used as highly electroconductive materials.

Electrical Properties of Sbcl5, Icl, Hno3, and Br2 Intercalated Pitch Based Carbon Fibers

1982 ◽  
Vol 20 ◽  
Author(s):  
V. Natarajan ◽  
John A. Woollam
Keyword(s):  
Heat Treatment ◽  
Thermal Stability ◽  
Electrical Properties ◽  
Carbon Fibers ◽  
Room Temperature ◽  
Double Sequence ◽  
Electrical Resistivities

ABSTRACTHighly graphitized pitch based carbon fibers with heat treatment temperatures (HTT) of 2500°C, and 3000°C have been intercalated with SbCl5, ICl, HNO3, and Br2. These were reacted either by themselves alone, or in double sequence (e.g. Br2 followed by SbCl5). The electrical resistivities of individual fibers were then measured in air, and as a function of temperature, to a series of temperatures, to test air and thermal stability. The lowest resistivity found in this sequence so far is 28 micro ohm cm when ICl intercalation was followed by HNO3 reaction. These conductors are sometimes air stable (depending on intercalant) at room temperature and can be heated somewhat, but begin to deintercalate at much lower temperatures than was found for CuCl2 intercalated fibers [1,2]. In comparison with the CuCl2 reaction with pitch fibers, these intercalants react easily, and thesequential intercalations appear to give lower final resistivities.

Introduction

2017 ◽  
Author(s):  
Detlef Pollack ◽  
Gergely Rosta
Keyword(s):  
The Netherlands ◽  
Western Europe ◽  
West Germany ◽  
World Today ◽  
The World ◽  
Degree Of Stability ◽  
Important Exception ◽  
High Degree ◽  
Religious Landscape

In recantation of his earlier approach, Peter L. Berger now claims: ‘The world today, with some exceptions […], is as furiously religious as it ever was, and in some places more so than ever.’ The most important exception that Berger refers to is Western Europe. The introduction to Part II provides an overview of the religious landscape in Western Europe. The data show that the current religious situation in the countries of Western Europe is in fact subject to considerable variation. It would therefore be erroneous to describe Western Europe as secularized. At the same time, the data reveal that there have been clear secularization tendencies over the last few decades. To grasp the diversity of religious tendencies, Part II deals with three cases: West Germany with moderate downward tendencies, Italy with a considerably high degree of stability, and the Netherlands displaying disproportionately strong secularizing tendencies.

Redox-Inactive CO2 Determines Atmospheric Stability of Electrical Properties of ZnO Nanowire Devices through a Room-Temperature Surface Reaction

2019 ◽  
Vol 11 (43) ◽  
pp. 40260-40266
Author(s):  
Kentaro Nakamura ◽  
Tsunaki Takahashi ◽  
Takuro Hosomi ◽  
Takehito Seki ◽  
Masaki Kanai ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Room Temperature ◽  
Surface Reaction ◽  
Atmospheric Stability ◽  
Zno Nanowire ◽  
Temperature Surface

Synthesis and electrical properties of potassium intercalated carbon fibers

1983 ◽  
Vol 8 (3-4) ◽  
pp. 261-268 ◽  
Author(s):  
C. Manini ◽  
J.-F. Mareche ◽  
E. McRae
Keyword(s):  
Electrical Properties ◽  
Carbon Fibers

Room temperature AC electrical properties of polypyrrole/chromium oxide composite

2020 ◽  
Author(s):  
N. Sasidhar ◽  
T. Chandrashekar ◽  
B. Chethan ◽  
Y. T. Ravikiran ◽  
R. Megha
Keyword(s):  
Electrical Properties ◽  
Chromium Oxide ◽  
Room Temperature ◽  
Oxide Composite ◽  
Ac Electrical Properties

Electrical properties of ZnO-based photodetector prepared by room temperature DC unbalanced magnetron sputtering

2016 ◽  
Author(s):  
Eka Nurfani ◽  
Angga Virdian ◽  
Robi Kurniawan ◽  
Shibghatullah Muhammady ◽  
Inge M. Sutjahja ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Magnetron Sputtering ◽  
Room Temperature ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron

Piezoresistivity and Electrical Resistance Relaxation of Polyisoprene Nanostructured Carbon Allotrope Hybrid Composites

2015 ◽  
Vol 1117 ◽  
pp. 52-55
Author(s):  
Artis Linarts ◽  
Maris Knite
Keyword(s):  
Electrical Resistance ◽  
Room Temperature ◽  
Constant Pressure ◽  
Hybrid Composites ◽  
Conductive Filler ◽  
Force Sensor ◽  
Filler Concentration ◽  
Nanostructured Carbon ◽  
Carbon Allotrope ◽  
Resistance Relaxation

Polymer conductive filler composites are believed to be promising materials for flexible force sensor manufacture. Polyisoprene various carbon allotrope hybrid composites were made and their piezoresistive properties depending on the two type’s filler concentration and their ratio have been determined. Electrical resistance relaxations of hybrid composites at constant pressure in room temperature were determined as well. Experimental data of resistance relaxation was analyzed and fitted similarly to stress relaxation of polymers at constant pressure.

Effect of Cu-coated short carbon fibers on the mechanical and electrical properties of the epoxy composites

2012 ◽  
Vol 20 (4) ◽  
pp. 366-371 ◽  
Author(s):  
Weiwei Li ◽  
Lei Liu ◽  
Bin Shen ◽  
Yating Wu ◽  
Wenbin Hu
Keyword(s):  
Electrical Properties ◽  
Carbon Fibers ◽  
Epoxy Composites ◽  
Mechanical And Electrical Properties ◽  
Short Carbon
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