Papers by Author: Lili Widarti Zainuddin

Abstract: A ceramics sample of LiTaO3 was prepared using a sol-gel method. The sample is annealed at 750 °C for 48 hours. X-ray diffraction analysis indicate the formation of single phase, rhombohedral structure. An ac impedance study was used to analyse the conductivity of LiTaO3 at room temperature and at various temperatures.

Abstract: Preparation of LiTaO3 was done using the sol-gel method which is also known as the wet chemical technique. Thermal analysis (TG-DSC) of LiTaO3 precursor was studied to determine an optimized heating temperature. LiTaO3 was heated at 550 °C with different sintering time of 12, 24, 48 and 72 h. The formation of pure LiTaO3 occurred during sintering time of 72 h which was confirmed using X-ray diffraction (XRD). The morphology of pure LiTaO3 was recorded using a Scanning Electron Microscope (SEM). Pure LiTaO3 can only be formed at a longer heating time in order to complete the oxidation process.