About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
2026 Graduate Student Poster Contest
|
| Presentation Title |
SPG-10: Comparison of Fabrication Methods for High-Tb Multi-Component Ceramic Garnet Scintillators for Radiography Applications |
| Author(s) |
Nathan Gillespie, Kaden Anderson, Rebecca Lalk, Meredith Harpel, Luis Stand, Chuck Melcher, Sean Drewry, Katharine Page, Matthias Müller, Jarek Glodo, Govinda Adhikari, Mariya Zhuravleva |
| On-Site Speaker (Planned) |
Nathan Gillespie |
| Abstract Scope |
High-energy X-ray radiography is a critical technique for cargo scanning, but current scintillator materials cannot meet the field’s growing demands. Ce-doped multi-component garnet ceramics are a promising material class to address this gap. Here, (Y,Gd,Tb,Lu)3Al5O12:Ce is optimized by varying Tb and Ce concentrations. Then, phase-pure ceramics with the optimized formula (Y0.08Gd0.08Tb0.75Lu0.08)3Al5O12:Ce 1% are fabricated with traditional hot-isostatic pressing (HIP) and more novel uniaxial hot pressing (UHP). The scintillation performances of the optimized ceramics are similar, with highlights including an absolute light yield of 46,000 photons/MeV (among the highest for pure-Al garnets) and pure Ce3+ emission under ionizing radiation despite the high Tb concentration. Additionally, no light yield reduction occurred after doses up to 100 Mrad at 9 MeV, indicating the ceramics will likely meet radiation hardness needs. Overall, the ceramics demonstrate suitability for high-energy X-ray radiography applications. |