| abstract |
(57) [Summary] [Purpose] Ultra-high purity, low wettability to metals, To develop a container for molten metal that is impermeable and has little carbon dust. [Structure] Bulk density is 1.7 to 1.9 g / cm 3 , average pore radius is 0.2 to 2.0 μm, anisotropic ratio is 1.05 or less, and if necessary, the total amount of inorganic impurities other than carbon is Forming an amorphous carbon film on the surface of an isotropic graphite base material of 5 ppm or less. |