Study on Electrical Properties and Morphology of Garnet-Type Structure Li₇La₃Ce₂O₁₂with Different Synthesizing Routes

Abstract

The Li7La3Ce2O12 ceramic was synthesized in this work by using a conventional solid-state reaction route and a planetary ball-mill method. At room temperature, the sample had a tetragonal structure with space group I4/mmm, according to the X-ray diffraction analysis. The pure phase of the sample was successfully synthesized using conventional solid-state reaction routes. The impedance spectroscopy was used to measure the electrical properties of the samples over a wide temperature range from 30 °C to 300 °C. At much higher temperatures, both samples showed an incomplete semicircle arc with the smallest resistance value. The samples prepared using conventional solid-state reaction routes exhibits higher conductivity as the sample has denser microstructure.