| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Processing of Barium Zirconate-Based Protonic Conductors by Suitable Combination of Cold Sintering and Post Thermal Treatment |
| Author(s) |
Martin Bram, Moritz Kindelmann, Joachim Mayer, Olivier Guillon |
| On-Site Speaker (Planned) |
Martin Bram |
| Abstract Scope |
Cold sintering is a technology, which enables the densification of ceramic powders at significantly reduced sintering temperatures by a solution precipitation creep mechanism. In this work, cold sintering is applied for advanced processing of protonic conducting barium zirconate-based ceramics. Incongruent solution of doping cations like Y and Ce in the liquid sintering aid enables cold sintering up to densities beyond 90 % at temperatures below 400°C. Our work reveals that a post thermal treatment at intermediate temperature (1300°C) is necessarily required to recover and fully densify the bulk phase resulting in well-pronounced electrochemical performance. An attractive side effect is the segregation of cations like Y on the grain boundaries, partly compensating the core charge of the grain boundary and enhancing the protonic conductivity. Cold sintered and post thermally treated barium-zirconates were comprehensively characterized by microstructure analysis including high resolution STEM and impedance spectroscopy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Ceramics, Solidification |