| 摘要 |
PURPOSE:To manufacture easily fine and hollow bodies of carbon at a low cost by pulverizing pitch contg. an org. solvent having a low b.p. heating the resultin particles to form fine and hollow bodies of pitch, making the bodies infuside, and carbonizing and burning them. CONSTITUTION:Pitch having about 60-250 deg.C softening point is uniformly mixed with about 0.5-20wt% org. solvent having a low b.p. such as benzene or xylene as a blowing agnet, and the mixture is pulverized to 6-425 mesh particle size by means of an atomizer or the like. The resulting pitch particles contg. the solvent are heated in a moment to the b.p. of the solvent or above to form fine and hollow bodies of pitch. The bodies are made infusible by heating at a temp. below the softening point of the pitch in an atmosphere of an oxidizing gas such as the air, and they are carbonized and burned at about 600-2,000 deg.C for about 20-300min in a nonoxidizing atmosphere to obtain fine and hollow bodies of carbon. |
