Electronic properties of heat treated coals

摘要: Abstract Studies of the dependence electronic resistivity, Hall constant, diamagnetic susceptibility and electron spin resonance in on heat-treatment temperature were carried out for coal solids molded at room without binder. Akabira weakly-caking (d.a.f. C= 83·4 percent) Itmann strongly-coking C = 90·2 used. Electronic properties X-ray diagrams indicate that carbon is a hard (non-graphitizing carbon) soft (graphitizing respectively. The change sign constant closely related with presence fraction showing narrow component (002) diffraction line. It suggested changes depend concentration defects; defects are created when graphitic formed as result breaking cross-links due to high internal stresses.