Huge Dielectric Properties of CdCu3Ti4O12 with CCTO Structure.

The giant dielectric response in Cd-doped CaCu3Ti4O12 ceramics was studied over the temperature range from 40 K to 850 K. In all CaxCd1-xCu3Ti4O12 system, two broad dielectric dispersions around 150 K and 650 K and a dielectric anomaly at T1 were observed. The T1 decreases linearly with increasing Cd-molar ratio (x) from 733 K for CaCu3Ti4O12 to 632 K for CdCu3Ti4O12. CdCu3Ti4O12 exhibits ε ∼ 0.6 × 104 at room temperature and 1.4 × 104 at T1 (1 MHz). This evidence shows CdCu3Ti4O12 is still a member of high-dielectric materials in contrast to a previous work (ε ∼ 409 at 100 kHz). [ABSTRACT FROM AUTHOR]