Читать книгу Industrial Carbon and Graphite Materials - Группа авторов - Страница 265

Binder materials are needed not only to glue the unmeltable solid carbon particles together but also to give the mixture of solids and binder plasticity under forming temperatures. Their most important task however is the formation of the unmeltable carbon material, CTP coke, or petroleum coke. Thus the binder has to be of carbonaceous nature as well and should provide reasonable carbon yield after carbonization. When the final product is a synthetic graphite, a polyaromatic substance like CTP [Table 6.1.1.2 pitch properties is the only substance to provide the necessary material properties]. Precondition is the formation of the so‐called mesophase, which enables the later graphitizability. The apparent density of the baked material can be increased by impregnation with a carbonaceous material and subsequent rebaking. The efficiency of this process drops sharply with each additional impregnation and rebaking step.

Only a few materials are used as binders on an industrial scale, such as CTP for synthetic graphite and other not graphitized carbon products. Polymer resins are used as binders and impregnation materials in a wide variety of applications (thermosetting resins).