La_0.59Li_0.24TiO₃ ceramics obtained by spark plasma sintering: electric behavior analysis

Electrical response of La2/3-xLi3xTiO3 ceramics obtained by spark plasma sintering

“…This structure was reported by BERTAUT in 1953 and there is no cif file of it, which makes refinement difficult. A slight variation in the position and intensity of the diffraction peaks can be reported in comparison with the reference [9] where the sample was studied with x = 0.08 Li + ions. This behavior may be motivated by an increase in Li + ion concentration in the crystalline structure of the material, which creates a larger number of point defects within the crystal structure of the LLTO.…”

“…A potential of 0.5 V and a range of temperature and frequency of 25 to 270 0 C and 100 Hz to 10 MHz, respectively, were used as measurement parameters. The structural and electrical characterization was similar to that used in reference [9]. Figure 1a shows the X-ray diffraction patterns of the ceramics La2/3-xLi3xTiO3 doped with x = 0.11 after sintering and heat treatment.…”

“…The precursor materials, La2O3 (Aldrich -99.9%), Li2CO3 (Aldrich -99.9%) and TiO2 (Aldrich -99.7%) were subjected to a high energy milling process in a planetary mill. The sample was obtained by SPS following the same methodology used in the references [9,11].…”

“…MAE has been pointed out as an inexpensive way to produce materials out of balance in the most varied forms. The final milling products are generally nanoscale and are characterized by a large surface area, high defect density, and higher diffusion rates [9].…”

“…The Spark plasma sintering (SPS) process offers several advantages over conventional methods, such as ease of operation, high sintering speed, high reproducibility, safety, reliability, as well as high-density values in the samples [10]. Recently the authors of this work reported the use of this method for LLTO samples with x = 0.08 [9].…”