| 摘要 |
PURPOSE:To obtain a raw material for high purity special carbonaceous material having a prescribed coefficient of volumetric shrinkage, bending strength or the like by heat treating a carbonaceous raw material specified in volatile matter(VM), toluene soluble matter(TS), free swelling index, and Roga index or the like. CONSTITUTION:The carbonaceous raw material having <=40% VM, <=40% TS measured at the time of adjusting average particle diameter to 15-20mum, having a specific property and free from ash matter is heat-treated. As the specific property, one or more is selected from >=200 deg.C incipient fluidization, 1-9 free swelling index, 30-90 Roga index and 30-90% optically anisotropic structure >=30mum in size, and the product obtained by heat-treating has the properties of 3-20% VM, 1-10%gamma resin content measured at the time of adjusting average particle diameter to 15-20mum, >=10% coefficient of volumetric shrinkage in a bar-shaped molded body molded at 1t/cm<2> molding pressure and fired at 1000 deg.C, >=200kg/cm<2> bending strength in the fired body or the like. |
