| 摘要 |
PURPOSE:A carbonaceous substance which has fine pores of specific surface area and average pore diameter within specific ranges, respectively is heat- treated at elevated temperature to enable simple and inexpensive production of graphite whiskers of high tensile strength. CONSTITUTION:A stating material for activated carbon from wood or coal such as sawdust is heat-treated and further treated by chemical activation or gas activation to prepare activated carbon with a specific surface area of more than about 500m<2>/g and fine pores of 1-2nm diameter. Then, the resultant activated carbon is graphitized in a nonoxidative atmosphere such as nitrogen or argon gas at a temperature over 2,800 deg.C to give the objective graphite whiskers. |
