Precursor Materials and Their Carbon Yield

The carbon yield is defined as the ratio of the weight of the carbon residue after carbonization to the weight of the material prior to carboniz ition. 

Typical carbon yields of common and potential precursor materials are shown in Table 4.1 These yields are not fixed but depend to a great degree on the heating rate, the composition of the atmosphere, the pressure, and other factors (see below). The nature of the carbon yield, given in the last column, i.e., coke or char, is reviewed in the following section on graphitization. 

Precursor Average carbon yield (%) Type of carbon  

Softening Point 67 °C, Softening Point 77 °C, Softening Point 126 C 

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