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US 6,673,284 B2Granted
Method of making flexible graphite sheet having increased isotropy
AssigneeAdvanced Energy Technology Inc.
InventorsRobert Angelo Mercuri, Jeffrey John Gough, Ronald Alfred Greinke
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Abstract
The present invention relates to a flexible graphite sheet having increased isotropic properties. More particularly, the present invention relates to a flexible graphite sheet formed from particles of expanded natural graphite formed from graphite flake sized no more than about 30% by weight +80 mesh prior to expansion. The resulting sheet of flexible graphite exhibits improved conductive and fluid sealing properties.
Claims5
A method for making flexible graphite sheet, the method comprising:
- (i) providing graphite flake sized no more than about 30% by weight +80 mesh;
- (ii) treating the graphite flake with an intercalating solution to obtain heat expandable, intercalated graphite flake;
- (iii) exposing the intercalated graphite flake to an elevated temperature to exfoliate the intercalated graphite flake into expanded particles of graphite;
- and
- (iv) passing the expanded particles of graphite through pressure rolls to form a compressed sheet having opposed major surfaces.
2 more elements
Dependencies are inferred from the claim text.