▎ 摘　　要

NOVELTY - The method for preparing a low softening point pitch for use in an ionization chamber as an impregnant or binder for the wall material of the ionization chamber, involves removing oxygen element from the purchased or prepared graphene by a reduction method; dispersing the graphene with removed oxygen element into an organic solution, stirring the organic solution for 1-10 minutes using a glass rod, and then preparing and obtaining a graphene solution through ultrasonic dispersion; fully and uniformly mixing the asphalt and the graphene solution and standing; and drying the mixed solution in drying device until the solvent is completely removed, and preparing the low-softening-point asphalt for the ionization chamber. The organic solution is toluene, pyridine, quinoline, and/or tetrahydrofuran. The drying device has a vacuum, and/or stirring or rotary drying device. USE - Method for preparing a low softening point pitch for use in an ionization chamber as an impregnant or binder for the wall material of the ionization chamber. ADVANTAGE - The low-softening-point asphalt prepared by method can be specially used as an impregnant or a binder of a wall material of an ionization chamber, and the prepared negative electrode wall of the ionization chamber can be prepared by mixing the impregnant or the binder of the low-softening-point asphalt with superfine coke powder and a filler, so that the prepared negative electrode wall has high electrical conductivity (thermal conductivity) and good processability, and has the characteristics of excellent fine structure, high strength, high purity, and high uniformity. DESCRIPTION OF DRAWING(S) - The drawing shows differential scanning calorimeter-thermogravimetrydata of low softening point asphalt. (Drawing includes non-English language text).