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The effect of length and diameter on the resistivity of bromine intercalated graphite fibersThe resistivity of bromine intercalated graphite fibers has been shown to vary with both the diameter and the length of the fibers. This is due to bromine depletion from the fiber surface. Model calculations assuming a 1.0 micron bromine depletion zone for P-100, and 3.0 microns for vapor-grown graphite fibers fit the respective diameter dependence of their resistivities quite well. Length dependence data imply a bromine depletion zone along the length of P-100 fibers which is also a few microns, but that of vapor grown fibers appears to be as large as 300 microns. Despite these values, microfilaments, which are much smaller than the expected depletion zones, do form residual bromine intercalation compounds with resistivities about one-half of their pristine value.
Document ID
19900046277
Document Type
Reprint (Version printed in journal)
Authors
Gaier, James R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Synthetic Metals
Volume: 34
ISSN: 0379-6779
Subject Category
NONMETALLIC MATERIALS
Distribution Limits
Public
Copyright
Other