Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction

Abstract Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m-Li 2 ZrO 3 ) were investigated by processing TG-DTA, along with XRD, DLS, HRTEM. For this purpose, solid-state Li CO was carried out TG-DTA at different heating rates (10, 20, 30 °C/min) from room temperature to 1100 °C. The thermal data used calculate parameters two types isoconversional methods: Flynn-Wall-Ozawa (FWO) Kissinger-Akahira-Sunose (KAS). determined model-fitting method, applying Coats-Redfern (CR) approximation models. results confirmed formation pure m-Li , consists semispherical particles about 490 nm, using a very short time. average activation energy obtained FWO KAS methods 274.73 272.50 kJ/mol, respectively. It found that is governed three-dimensional diffusion mechanism. Based on these results, microscopic model proposed.