Study of the ionic conductivity of Li0.5La0.5TiO3 laser-sintered ceramics

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Silva, JHL (Author) Other; Alves, YGS (Author) Other; Almeida, A (Author) Other; Agostinho Moreira, JA (Author) FCUP; Vilarinho, R (Author) Other; Santos, JCA (Author) Other; Leyet, Y (Author) Other; Jesus, LM (Author) Other; Silva, RS (Author) Other

Journal

Title: Journal of the European Ceramic Society

Vol. 40

Pages: 5619-5625

ISSN: 0955-2219

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-00S-CHM

DOI: 10.1016/j.jeurceramsoc.2020.06.008

Abstract (EN): This work explores a chemical synthesis route and, for the first time, laser processing of ionic conductor Li0.5La0.5TiO3 (LLTO) ceramics. The laser sintering technique has been efficient in producing highly dense singlephase ceramics in just a few minutes, starting from an amorphous precursor powder. As comparison, conventionally sintered ceramics were also prepared. Both methods yield polycrystals with long-range structure compatible with a single cubic perovskite, as confirmed by Rietveld refinement of the powder XRD pattern. In contrast, Raman spectroscopy has revealed non-cubic symmetry, indicating the formation of ordered nanodomains. At room temperature, high ionic conductivity of similar to 0.5 mS/cm was achieved for the bulk of laser and conventionally sintered samples. However, the grain boundary conductivity changed from 1.10(-3) mS.cm(-1) (laser-sintered) to 6.10(-3) mS.cm(-1) (conventionally sintered), which was attributed to changes in the micro structural characteristics of the ceramics.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7