Synthesiscof barium titanate nanocubes by hydrothermal

Abstract

In this work, BaTi03 has been synthesized via hydrothermal method using Titanium (IV) bis (ammonium lactate) dihydroxide solution and Barium dihydroxide as the Ti and Ba precursors, respectively as well as 3M of NaOH. The systhesis process was undertaken in an oven at the temperature range of 230 C since low temperature was needed compared with other wet-chemical methods. Oleic acid and tert-butylarnine were used as the surfactants to control the morphology and the size of the BaTi03 particles by tuning the concentration of the formers. The synthesized powders were calcined and then characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR) and Scanning Electron Microscopy (SEM). The powders were later pressed into pellets and sintered at l 300 ° C - 250 ° C. The sintered pellets were further characterized using Electrochemical Impedance Spectroscopy (EIS). The powder calcined at 900 ° ° C showed the formation of single phase BaTi03 nanocubes. Through the EIS characterisation, highest dielectric constant was obtained at lkHz for the molar ratio of 1: 18: 18, which is 579.15. It is evident that hydrothermal synthesis method is the cost effective, temperature controlled and alternative way to synthesize single-crystalline BaTi03 in the nano-sized and cubic morphology.