Ultrafast crystallization and sintering of Li1.3Al0.3Ti1.7(PO4)3 glass through flash sinter‐crystallization

Flash sinter‐crystallization (FSC) is a new technique for concurrently crystallizing and sintering glasses, derived from flash sintering. In this study, we explore, for the first time, the use of FSC as a processing method for producing Li1.3Al0.3Ti1.7(PO4)3 (LATP) glass ceramics. Using FSC, LATP wi...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2024-03, Vol.107 (3), p.1806-1821
Main Authors: Campos, João V., Lavagnini, Isabela R., Zallocco, Vinicius M., Jesus, Lilian M., Rodrigues, Ana C. M.
Format: Article
Language:English
Subjects:
Crystallization
Densification
flash sintering
Glass ceramics
Heating rate
impedance
Ion currents
Molten salt electrolytes
NaSICON
Production methods
Resistance sintering
Sintering
solid electrolyte
Solid electrolytes
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Summary:Flash sinter‐crystallization (FSC) is a new technique for concurrently crystallizing and sintering glasses, derived from flash sintering. In this study, we explore, for the first time, the use of FSC as a processing method for producing Li1.3Al0.3Ti1.7(PO4)3 (LATP) glass ceramics. Using FSC, LATP with NaSICON structure is produced at a furnace temperature as low as 460°C and a processing time of 5 min. The FSC‐processed samples with different current density limits were compared with those conventionally sinter‐crystallized (CSC) at 950°C for 1 h. We show that FSC can significantly improve the densification of LATP glass ceramics due to the volumetric high heating rate. Furthermore, the LATP samples processed by FSC exhibit superior total ionic conductivity than those processed by CSC, also surpassing the reported results for LATP with similar levels of densification. Therefore, our results suggest that FSC is a promising method for processing glass ceramics, particularly for materials with high crystallization kinetics like LATP, opening up new possibilities for the production of solid electrolytes.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.19393