| 摘要 |
Carbon bodies are fabricated by forming carbonaceous mixtures into "green" bodies of the desired dimensions and then joining these "green" bodies together with a carbonaceous bonding agent, surrounding the joint with support tape to prevent escape of the bonding agent and heating the jointed pieces in a baking furnace. The bonding agent may be any suitable liquid or liquefiable carbonaceous material, for example a mixture of 15 to 85% coal tar pitch and 85 to 15% coal tar with a preferred composition of 35% coal tar pitch and 65% coal tar. The tape is preferably an adhesive tape which can be carbonized or volatilized in the subsequent baking operation, but a support tape of sheet steel or aluminium can be used. The joined pieces are preferably packed in the furnace with the joint horizontally disposed and submitted to an hydraulic pressure of 5 to 7 lbs. per sq. inch during the baking. The carbon body formed is optionally graphitized. |
