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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2020

Autores

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

Revista

Título: Journal of the European Ceramic Society

Vol. 40

Páginas: 5619-5625

ISSN: 0955-2219

Editora: Elsevier

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 11 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7