| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Powder and Ceramic Materials Science
|
| Presentation Title |
Microstructure-processing Relationships in Rare Earth Doped Alumina Ceramics for Lighting/laser Applications |
| Author(s) |
Xingzhong Wu, Matthew A Duarte, Yasuhiro Kodera, Elias H Penilla, Javier E Garay |
| On-Site Speaker (Planned) |
Xingzhong Wu |
| Abstract Scope |
Rare earth (RE) doped ceramics are important for solid-state lighting/lasing in medical and industrial applications. Alumina (Al2O3) as one of the most useful ceramics, has a variety of structural and optical applications due to its chemical, thermal stability and excellent mechanical properties. However, low equilibrium solubility of RE in alumina and its birefringent nature pose great challenge to making transparent RE:Al2O3 for photoluminescence (PL) applications. Here we present synthesis of Al2O3 powder doped with various REs through both mechanical mixing and co-precipitation, as well as fabrication of sub-micrometer grained RE:Al2O3 ceramics using current-activated, pressure-assisted densification (CAPAD). We discuss the effect of synthesis/processing on the microstructure (RE distribution, grain size) and optical properties (transmission, absorption and emission). These ceramics show high transparency and characteristic PL from RE3+, providing emission in the 1 – 2um range, suggesting the possibility of using co-precipitation synthesis/CAPAD to incorporate RE into Al2O3 ceramics for optical applications. |
| Proceedings Inclusion? |
Planned: |