Cover glass adhering device

Abstract

Graphite flake is annealed at a temperature of at least about 3000° C. prior to intercalation. This annealing process results in enhanced expansion of intercalated graphite flake and provides uniform expansion of intercalated graphite flake derived from variety of sources.

What is claimed is:  
     
         1 . A process for enhancing the expansion of intercalated graphite flake comprising annealing the graphite flake at a temperature of at least 3000° C. prior to intercalation.  
     
     
         2 . The process claim of  claim 1  wherein the annealing is performed for a period in excess of 1 hour.  
     
     
         3 . The process of  claim 2  wherein the annealing is performed in an inert environment.  
     
     
         4 . A process for achieving expansion of graphite flake comprising: 
 (1) annealing the flake at a temperature of at least 3000° C. for at least about 1 hour; and    (2) treating the flake with an intercalant solution to provide intercalated graphite flake.    
     
     
         5 . The process of  claim 4  wherein the annealing is performed in an inert environment.  
     
     
         6 . The process of  claim 4  wherein the intercalated flake is blended with an organic reducing agent.  
     
     
         7 . The process of  claim 4  wherein an expansion aid is included in the intercalant solution.