A Field Emission Stem Study of the Br Distribution in Brominated Graphite Fibers

  • X. W. Qian
  • S. A. Solin
  • J. R. Gaier
Part of the NATO ASI Series book series (NSSB, volume 148)


Brominated pitch based graphite fibers exhibit certain novel properties and potential applications [1,2]. For example, it has been observed that an 18 fold reduction of their resistivities of the pitch-based graphite fibers can be achieved if the pristine fibers are allowed to fully interact with bromine [3] and even the residual fiber compounds that are formed by pumping off the bromine from the fully brominated fibers (saturated fibers), exhibit a five-fold reduction in the resistivities relative to that of the pristine fibers [3]. To understand this property, it is essential to know the Br distribution in such fiber compounds. Here we focus on the residual fibers that have a density of 2.2 gm/cm3 corresponding to a composition of BrC4 5.


Scan Transmission Electron Microscope Incident Electron Graphite Fiber Incident Electron Beam Electron Path 
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  1. 1.
    J.G. Hooley and U.R. Diets, Carbon 16, 251 (1978)Google Scholar
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    J.R. Gaier and D. Marino, NASA TM-87016,1985.Google Scholar
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    J.R. Gaier, NASA TM-87275,1986.Google Scholar
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    J.I. Goldstein in Introduction to Analytical Electron Microscopy, edited by J.J. Hern, J.I. Goldstein and D.C. Joy ( Plenum Press, New York and London, 1979 ).Google Scholar
  5. 5.
    X.W. Qian, S.A. Solin, and J.R. Gaier, Phys. Rev., submitted.Google Scholar

Copyright information

© Springer Science+Business Media New York 1986

Authors and Affiliations

  • X. W. Qian
    • 1
  • S. A. Solin
    • 1
  • J. R. Gaier
    • 2
  1. 1.Department of Physics and AstronomyMichigan State UniversityEast LansingUSA
  2. 2.NASA Lewis Research CenterClevelandUSA

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