| 摘要 |
PURPOSE:A formed plate of a mixture containing a thermosetting resin and small balls of mesophase carbon is perfectly cured and carbonized to a carbon plate which is suitable for use in phosphate type fuel cells, because it is excellent in gas impermeability, electric conductivity and mechanical strength. CONSTITUTION:10-40wt% of a thermosetting resin such as a phenolic resin are mixed with 90-60wt% of mesophase small balls of 50mu or less maximum particle sizes which are prepared by heat-treating petroleum heavy oil or coal tar pitch and fractionating the product with solvents. The mixture is, when necessary, dried, precured and crushed. The crushed product is pressed with rollers or a press under heating into a plate. The plate is perfectly cured at 150-200 deg.C and carbonized at temperature up to 1,000 deg.C at temperature-rising rate of less than 50 deg.C/hr. |
