Abstract
A polymer pyrolysis solution method was employed for the synthesis of Ca1-xSrxCu3Ti4O12/TiO2 ceramics. At 30 °C and 1 kHz, a high dielectric constant (ε') ~ 4193–10,110 and very low loss tangent (tanδ) ~ 0.009–0.039 were achieved. Interestingly, a Ca0.95Sr0.05Cu3Ti4O12/TiO2 ceramic sintered at 1060 °C for 5 h displayed a dielectric temperature coefficient (∆ε') of less than ±15% over a temperature range −60–210 °C, which is wider than that ever reported. All ceramic samples displayed nonlinear J-E characteristics. Sr2+ doping significantly enhanced the breakdown field (Eb) and the nonlinear coefficient (α) with the highest Eb of ~20,548 V·cm−1 and α value of ~52.06 in a Sr2+-doped ceramic where x = 0.05. X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM) were employed to study of the influence of Sr2+ doping on the microstructure and phase composition of the samples. The oxidation state of Cu ions in ceramic samples was investigated using X-Ray Absorption Near Edge Spectroscopy (XANES).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
