辊
By forming an alumina protective film in a specific area of the roller hearth furnace, the problem of the reaction between the raw materials of lithium-ion battery cathode components and the roller at high temperatures was solved, resulting in cost reduction and lifespan extension.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- COORSTEK GK
- Filing Date
- 2023-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
The protective film of the existing roller hearth furnace rollers reacts with the raw materials of lithium-ion battery positive electrode components at high temperatures, causing the reactant blocks to detach, forming pits, increasing manufacturing costs and reducing the service life of the rollers. Moreover, the existing technology has not effectively solved the reaction problem of lithium-ion battery raw materials within the heat treatment temperature range.
A protective film of alumina is formed in a specific area of the roller, with a thickness of more than 70 μm and less than 250 μm, and a C/L ratio of 0.33≦C/L≦0.8, to avoid full-length surface coverage. Combined with a mullite or zirconium oxide intermediate layer, the risk of reaction and cracking is reduced.
It effectively inhibits the reaction between the roller substrate and the metal elements of the workpiece, reduces manufacturing costs, extends the service life of the roller, and reduces cracking and peeling of the protective film.
Smart Images
Figure CN117248174B_ABST