Preparation, microstructure, and nonlinear (I-V) properties of CaCu3Ti4-xSnxO12 nanoparticles prepared by polymer pyrolysis solution method

Abstract

This research is prepared the CaCu3Ti4-xSnxO12 (CCTSO) powders by using the polymerpyrolysis (PP) method. Phase composition and microstructure were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD result displays the main peaks of CCTO for all powders and ceramics. The SEM study showed small and large grain sizes for the Sn-doped samples and the EDS displays increase amount of Sn with increasing Sn-doped sample. Interestingly, the undoped sample sintered at 1015 ºC for 10h displayed very low loss tangents (tan0.017) and giant dielectric constants (10,942) with temperature coefficients less than ±15% in the temperature range of −50–125 ºC. These results indicate that the CCTSO prepared by PP method is a promising high- material for practical capacitor application. For the Sn-doped samples, both dielectric constant and tanare increase with increased Sn-doping. The highest dielectric constant of Sn-doped is about of 190,182 for 15% Sn-doped. In additionally, all samples ceramics showed non-linear characteristic and found that the highest non-linear coefficient () and breakdown field (Eb) values of 10.75 and 2293.3, respectively. 