Structural, micro-structural, morphological, electrical spectroscopy and optical analysis of lithium-titanium oxide electronic material

Abstract

In this paper, we perform a thorough analysis into the electrical properties of high-purity, thick Li2TiO3 discs generated by the mixed oxide process, covering a wide range of frequencies and temperatures. Li2TiO3 samples are calcined and sintered at 920 °C and 940 °C. X-ray diffraction shows a monoclinic crystal structure with a space group of C2/c(15), matching JCPDS card (00-033-0831). The Scherrer and W-H plot methods provide consistent crystallite sizes of 51.23 and 49.34 nm. SEM and EDAX at room temperature reveal the material's structure and chemistry. The microstructure has well-defined porosity and homogeneous grain dispersion, with an average grain size of 2.82 µm. We studied frequencies from 1 kHz to 1 MHz and temperatures from 30 °C to 450 °C. Measure dielectric constant, tangent loss, and electrical conductivity. Above 350 °C, the dielectric constant increases significantly. Between 400 °C and 450 °C, electrical conductivity activation energy ranges from 0.431 to 0.624 eV. UV–Visible spectroscopy shows maximal absorption at 201 nm, indicating a band gap value of 3.78 eV. Its residual, saturation, and coercivity values were 0.00286 µc/cm2, 0.0267 µc/cm2, and 0.974 kV/cm, respectively, from the hysteresis loop. The UV spectrum shows Li2TiO3 absorbs most light at 201 nm and has a 3.82 eV band gap. Its composition and chemical processes are confirmed by FTIR peaks at various wavenumbers. Based on these results Li2TiO3 might have the potential applications in electronic devices such as capacitors, insulators, and electrochemical sensors as well as humidity and gas monitoring devices.