Dielectric and Electrical Properties of Cobalt Vanadium Doped and Undoped CCTO Ceramics Synthesized via Semi Wet Route

Abstract

Ceramics of CaCu3Ti4O12 (CCTO) and CaCu3Ti3.95Co0.025V0.025O12 (CCTCVO) were produced using an innovative and cost-effective semi-wet route method. The formation of phases of both CCTO and CCTCVO ceramics were verified by XRD analysis. Their average crystallite sizes were measured to be approximately 60.9 ± 5.0 and 60.7 ± 5.0 nm, respectively. XPS examinations confirmed that each element maintained its proper oxidation state. The composition of the ceramics was further analyzed using EDS. At a temperature of 563 K and a frequency of 100 Hz, the recorded maximum dielectric constant values for CCTO and CCTCVO were 86,776 and 20,479, respectively. A noticeable reduction in the dielectric constant was observed at higher frequencies. The maximum dielectric loss values for the CCTO and CCTCVO ceramics were determined to be 460 and 302 at 523 K, 100 Hz and 553 K, 100 Hz, respectively. © The Korean Institute of Electrical and Electronic Material Engineers 2024.