Accurate measurement of pitch-based carbon fiber electrical resistivity

Alcino Palermo De Aguiar,Caroline Jovine Bouças Guimarães,Alexandre Taschetto De Castro

doi:10.1590/0104-1428.08720

Alcino Palermo De Aguiar, Caroline Jovine Bouças Guimarães + Show 1 more

Open Access

https://doi.org/10.1590/0104-1428.08720

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Abstract

This study investigated the appropriate methodology required to measure single carbon fibers electrical resistivity. Two- and four-probe methods were evaluated for this measurement. Comparing results for single filaments of pitch-based and PAN-based fibers shows that the two-probe method gives acceptable results for PAN-based fibers, but much higher deviations from adjusted resistivity for pitch-based fibers (>15%). The four-probe method shows small deviations (<1%) for both precursors and is the most suitable for measurements of pitch-based carbon fibers. The four-probe method gives higher accuracy than the two-probe for all samples tested.

Highlights

Mesophase pitch-based carbon fibers have higher carbon-fiber resistivity test method has some limitations, and transport properties than most polymers, because of the it could be inadequate for carbon fibers’ electrical resistivity mesophase pitch’s ability to form highly ordered graphite measurements with highly ordered graphite domains such domains[1,2,3,4,5,6,7]
For the two-probe method, the electrical resistivity relative deviations of the PAN-based fibers are less than 4%, while the pitch-based deviations exceed 10%
The two-probe method specified by ISO resulted in up to 2% relative deviation from adjusted resistivity for PAN-based fibers and over 15% deviation for pitch-based fibers

Summary

Introduction

Mesophase pitch-based carbon fibers have higher carbon-fiber resistivity test method has some limitations, and transport properties than most polymers, because of the it could be inadequate for carbon fibers’ electrical resistivity mesophase pitch’s ability to form highly ordered graphite measurements with highly ordered graphite domains such domains[1,2,3,4,5,6,7]. They are used as thermal and as mesophase pitch-based carbon fibers. It can be applied in the evaluation of pre and post-processing steps such as intercalation[23,24], annealing[25], and coating[26,27,28,29]

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Results

Conclusion