Preparation and properties of ceramic-based conductive coatings

Ceramic-based conductive coatings were prepared by sol–gel method with artificial graphite (CGM) as conductive fillers and methyltrimethoxysilane (MTMS) and silica sol as dispersion medias. The graphene (Gr) and carbon black (CB) were added to improve the properties of the resultant coatings. The results showed that the electrical conductivity and thermal stability of coatings were improved by the addition of Gr and the electrical conductivity of coatings was further improved by the addition of CB for decreasing the pores of coatings. When the amount of CGM was 15.0 wt% with adding 1.0 wt% Gr and 0.5 wt% CB in the coating, the resistivity of obtained coating reduced to 1.46 Ω·cm and its adhesion increased to 3911.62 mN. The prepared coating presented excellent electrical conductivity and adhesion properties, which was much better than the coating prepared without adding Gr and CB.