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An organic polymer compound such as poly(p-phenylene) is heat treated under an atmosphere of an inert gas such as argon at 500°to 1,500°C., preferably in the vicinity of a carbonization temperature (the range from the carbonization temperature to the carbonization temperature+300°C.) to obtain a car

An organic polymer compound such as poly(p-phenylene) is heat treated under an atmosphere of an inert gas such as argon at 500°to 1,500°C., preferably in the vicinity of a carbonization temperature (the range from the carbonization temperature to the carbonization temperature+300°C.) to obtain a carbon material having properties of both a carbon substance and an organic substance.

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A primarily amorphous carbon material obtained by heat-treating an organic, non-heterocyclic polymer compound under an inert gas atmosphere at a temperature of 500°to 1500°C., wherein said amorphous carbon material (1) has a hydrogen/carbon atomic ratio from 0.15 to 0.40, (2) a density from 1.3 to 2

A primarily amorphous carbon material obtained by heat-treating an organic, non-heterocyclic polymer compound under an inert gas atmosphere at a temperature of 500°to 1500°C., wherein said amorphous carbon material (1) has a hydrogen/carbon atomic ratio from 0.15 to 0.40, (2) a density from 1.3 to 2.1 g/cm3, (3) an amorphous structure, (4) exhibits peaks in the vicinity of 1350 cm1 and 1600 cm-1 and no clear peak in the vicinity of 2700 cm-1 in a Raman spectrum analysis using an argon ion laser beam having a wavelength of 5,145 Å, (5) exhibits a peak in the vicinity of 120 to 130 ppm, in NMR analysis, arising from aromatic cyclocondensation, and (6) has electrical conductivity, with a resistivity of 10-3 to 104 W