Non-Ohmics and Electrical properties of CaCu3Ti4O12 doped strontium ceramics prepared by a polymer pyrolysis method

Abstract

This research is prepared the CSrCT0.35O-0, CSrCT0.35O-3, CSrCT0.35O-10 and CSrCT0.35O-20 powders by using the polymerpyrolysis solution method. Microstructure and phase composition were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Study the electrical properties as at room temperature and 1 kHz. Study the influences of non-linear current voltage The results showed that the particles in the range of 2-5 micrometer of the prepared powder at calcined temperatures at 850 ºC for 9h. XRD result displays the main peaks of CCTO and small amount of TiO2 and CuO for all powders and ceramics samples. The SEM study showed small and large grain sizes and the EDX displays amount of doped strontium at small grain size higher than large grain size. At room temperature and 1 kHz the ceramic sample doped amount 0.10 %wt showed large dielectric constants (   95904) while the ceramic sample doped 0.20 %wt showed small dielectric loss tangents (tan0.074). In additionally, the ceramic sample doped Sr with x=0.20 showed high non-linear coefficient () and breakdown field (Eb) values of 5.6 and 1859, respectively