CHARACTERIZATION OF CARBONACEOUS PRODUCTS BY TG AND DTA

Thermogravimetry and differential thermal analysis, using only a combu stion step with oxygen, were used to characterize carbonaceous product s, Binary composition of alumina and wood charcoal, coke, carbon black , petroleum coke or carbon graphite were prepared containing 5 wt% of each. They were characterized by the burnout onset and DTA and DTG pea k temperatures, which range from 476 degrees C for wood charcoal to 79 0 degrees C for carbon graphite. Complementary characterization of eac h product was also performed by estimating the ash content from the TG curves, and the calorific value from the DTA curves. The results indi cate that these thermal analysis techniques, with only one oxygen burn out step, can be applied both for quality control of each raw material , and to determine the appropriate processing temperatures of the cera mic compositions in which they are used.