Dielectric properties and nonlinear electrical behavior of CaCu3Ti4−x(Sb1/2Ta1/2)xO12 ceramics
CaCu3Ti4O12 (CCTO) ceramics exhibit giant permittivity; however, achieving low dielectric loss (tan δ) together with balanced electrical performance remains challenging for practical applications. In this work, Sb3+ and Ta5+ were co-doped at the Ti-site of CaCu3Ti4−x(Sb1/2Ta1/2)xO12 (x = 0–0.2) to tailor the defect che...