Ultrafast crystallization and sintering of Li_1.3Al_0.3Ti_1.7(PO₄)₃ glass through flash sinter-crystallization

Author(s)

Campos, Joao V. ; Lavagnini, Isabela R. ; Zallocco, Vinicius M. ; Jesus, Lilian M. ; Rodrigues, Ana C. M.

• Document type: Journal article
• Source: Journal of the American Ceramic Society; v. N/A, p. 16-pg., 2023-08-21.

Abstract

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 & DEG;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 & DEG;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. (AU)

• FAPESP's process: 21/06509-9 - Ionic conductor glass-ceramics sintering with concurrent crystallisation using flash sintering
• Grantee: João Vitor Campos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/12412-8 - Contribution to the study of ionic conduction mechanisms in glasses
• Grantee: Vinicius Martins Zallocco
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
• Grantee: Edgar Dutra Zanotto
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC