METHOD FOR PREPARATION OF LOW TEMPERATURE HEATING ELEMENT OF CARBON MATERIAL FROM PITCH AS PRECURSOR

摘要

PURPOSE: Provided is a cost-efficient method for preparation of low temperature heating element of carbon material starting from pitch precursor. CONSTITUTION: The method comprises the steps of providing a pitch precursor; the first heat treatment of the pitch precursor to prepare mesophase pitch; shaping the pitch into the desired shape; the second heat treatment of the shaped pitch under oxidizing atmosphere to stabilize; and the third heat treatment for carbonizing the shaped pitch. Alternatively, the method further comprises the step of mixing coke into the pitch after the first heat treatment. The first heat treatment is carried out under inert atmosphere at the temperature of about 400 to about 550 deg.C and the second heat treatment is carried out at the temperature of about 150 to about 200 deg.C. In the step of mixing, the ratio of the thermally treated pitch and coke is 100:0.1 to 100:40.