About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Development of a Li-Corrosion Resistant Coating for Mullite-Cordierite-based refractory |
| Author(s) |
Hyojin Lee, William M. Carty |
| On-Site Speaker (Planned) |
Hyojin Lee |
| Abstract Scope |
Lithium-based cathode materials for battery applications tend to be highly corrosive at normal processing temperatures, resulting in severe corrosion of kiln furniture, typically composed of mullite and cordierite. To combat Li attack of the refractories a two-layer system was constructed based on an “Armor” layer that slows down the diffusion of Li+ ions, backed up by a mullite-based glass-ceramic layer which was designed to react with any lithium passing through the Armor layer and prevent Li from reaching the cordierite and mullite refractory saggar. The glass-ceramic layer was designed to first form a Li-aluminosilicate glass and then, with additional Li, crystallize beta-eucryptite (LiAlSiO4). Once saturated with Li, the glass-ceramic layer will automatically spall on cooling due to the thermal expansion mismatch between the coatings and the saggar, indicating the need to replace the lining. |