熱処理炭の微細組織

Abstract

Three different ranks of-coals (Taiheiyo, Yubari and Cerro) carbonized at 1200°C were investigated to clarify the microtexture. These carbonized coals were compared with the deashed ones, phenol-folmaldehyde resin and petroleum residue heattreated at the same temperature in microtexture formation by using electron microscopy and X-ray diffraction.Although minerals contained affect the microtexture formation in carbonized coal, the substantial phases of the above carbonized coals are as follows: Taiheiyo coal gives its carbonized one a porous micropore phase in which a unit structure consists of only two carbon layers in 2 nm, and it is distributed irregularly in the microtexture. On the other hand, both Yubari and Cerro coals give substantially lamella phase, in which their unit structures are piled in three or four carbon layers in 2 nm, and each other locally in a preferred orientation along the c-axis. But Cerro coal gives a strong preferred orientation as compared with Yubari one. Moreover, the rate of stacking structure in carbonized Cerro coal (about 90%) is higher than in Yubari one (about 80%).