About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Enhanced Mid-Infrared Reflectance and Radiation Thermal Barrier Performance of Sc3+-Doped La2Zr2O7 Ceramics |
| Author(s) |
Hao Wang, Hao Bai, Hao Chen |
| On-Site Speaker (Planned) |
Hao Wang |
| Abstract Scope |
Conventional thermal barrier coatings predominantly rely on low thermal conductivity mechanisms. This study introduces a strategy to enhance high-temperature infrared radiation thermal barrier performance by doping rare-earth elements into lanthanum zirconate to elevate mid-infrared reflectance. A series of (La1-xScx)2Zr2O7（x=0–0.100） ceramics were synthesized via a molten-salt method. With increasing Sc3+ concentration, the mid-infrared reflectance initially increased and then decreased. The optimal (La0.925Sc0.075)2Zr2O7 sample achieved a peak reflectance of 52.75%, representing a 44.36% enhancement over pristine La2Zr2O7 (36.54%). Mechanism analysis indicates that Sc3+ doping effectively modulates the energy band structure and electrical conductivity of the matrix, optimizing its optical response. Finally, 1000 °C radiation tests confirmed that the high-reflectance sample significantly reduced surface temperatures, verifying the feasibility of developing next-generation novel thermal barrier coating materials by suppressing radiative heat transfer. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Surface Modification and Coatings, High-Temperature Materials |