Fig. 4: Dielectric responses of entropy-modulated CTO-based ceramics.
From: Colossal permittivity in high-entropy CaTiO3 ceramics by chemical bonding engineering
a Frequency-dependent permittivity and dielectric loss (tanδ) of CTO-based ceramics measured at room temperature (RT). b Temperature-dependent permittivity and dielectric loss (tanδ) of CTO-based ceramics measured at 1 kHz. c Temperature dependence of dielectric properties at various frequencies (100 Hz, 1 kHz, 10 kHz, 100 kHz) for the NSCST ceramic, indicating a small capacitance temperature coefficient (ΔC/C25°C) and an excellent thermal stability. d Variation in the chemical bonding property (ICOHP/L) and semiquantitative oxygen vacancy (Vo) concentration after entropy modulation. e Evolution of dielectric performance (RT, 1 kHz) as a function of configurational entropy. f Comparison between this work with other representative CP materials8,9,34,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75.
