DENSE GRAPHITE PHENOLIC RESIN STRUCTURES

摘要

A dense graphite structure comprises, by wt., 5-25% of a thermosetting phenolic resin binder, and 75-95% graphite powder having max. particle size is not >20 mu m and the following size-distribution: 80-160 mu m - 37-76%; 60-100 mu m - 20-74%; 50-80 mu m - 10-48%; 40-60 mu m - 3-23%; below 50 mu m - 1-12%. The binder is mixed with a liq. dispersant, and the graphite particles are admixed therewith. The mixt. is dried and hot moulded under pressure. The structures are used as complex shapes to be used in fuel cells having acid electrolyte. The shapes are obtd. by moulding rather than machining, and are homogeneous and impermeable to gas and electrolyte.