*3.2.3 Electrical properties*

Electrical properties of graphene ceramic composites can be revealed on the basis of percolation theory as shown in **Figure 4**. Generally, in this theory threshold in percolation magnitude attributes to critical filler constituents, where increase in electrical conductivity results because of the presence of several conducting paths for electrons. These conducting paths of electrons do not stand if percolation magnitude lacks certain transition limit. Therefore, in order to ensure the availability of conducting chains in ceramics, percolation threshold must be much higher than threshold


**Table 1.** *Sintered composites vs. fracture toughness.* *Graphene Based Functional Hybrids: Design and Technological Applications DOI: http://dx.doi.org/10.5772/intechopen.108791*

#### **Figure 4.**

*Electrical conductivity and percolation phenomenon as a function of filler volume fraction in graphene based ceramic composites.*

value. Hence, number of these electron paths causes an elevation in electrical conductivity of graphene ceramic composites [20].
