Dielectric properties of Al2O3 modified CaCu3Ti4O12 ceramics

Significantly improved non-ohmic and giant dielectric response in CaCu3Ti4O12 ceramics by incorporating Portland cement

“…These results indicated that addition of PC can effectively improve the giant dielectric properties of CCTO ceramics. Kotb et al [38], Zhang et al [9], and Choi et al [31] reported a significant decrease in the tanδ values of CCTO ceramics by doping with Al 3+ ions. Wang et al [39] also reported that the tanδ values of CCTO ceramics prepared by a sol-gel method can be reduced by doping with K + ions.…”

“…Recently, giant dielectric oxides, which are oxide materials that can exhibit high dielectric permittivity (ε′∼10 4 ) without a detectable phase transition (e.g., CaCu 3 TiO 4 O 12 (CCTO) and related Cu 3 TiO 4 O 12 compounds, such as CuO, and NiO-based ceramics, among others), have been widely reported [1][2][3][4][5][6][7][8][9][10][11]. This discovery has stimulated significant research activity.…”