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Flexible graphite sheet with decreased anisotropy

  • US 6,254,993 B1
  • Filed: 08/13/1998
  • Issued: 07/03/2001
  • Est. Priority Date: 06/26/1997
  • Status: Expired due to Term
First Claim
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1. Flexible graphite sheet formed by compressing a blended mixture of relatively large particles of intercalated, exfoliated, expanded natural graphite at least 80% by weight sized 20×

  • 50 mesh prior to exfoliation and expansion with smaller particles of intercalated, exfoliated, expanded particles of natural graphite at least 80% by weight sized 50×

    100 mesh prior to exfoliation and expansion, the smaller particles being present in the amount of 25 to 75% by weight, characterized by having increased electrical conductivity through the thickness of the sheet as compared to a flexible graphite sheet formed only from relatively large particles of intercalated, exfoliated, expanded natural graphite.

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