| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Glasses, Optical Materials, and their Functional Applications: Current Issues in Science & Technology
|
| Presentation Title |
Development of YAG-alumina Composites for the Lightening Applications |
| Author(s) |
Sekyung Chang, Robert E Kusner, Fritz Grensing, Wenbo Zhang |
| On-Site Speaker (Planned) |
Sekyung Chang |
| Abstract Scope |
A cerium doped YAG (Y3Al5O12)-alumina composite was developed by solid state sintering in air. Low grade (3N) yttria and, ceria (or cerium nitrates) powder, and alumina obtained from the alumina grinding media eroded during ball milling of the oxide powder mixture were used as starting materials. With a small amount of silica-based sintering aids, the YAG-alumina composites can be sintered in air to near theoretical density at a temperature as low as 1525oC for 8 hours. The amount of ceria in YAG-alumina composites affects not just the intensity of the light output but also in the densification of the YAG-alumina composites. The optical efficiency of YAG-alumina composites as a function of cerium concentration, sintering temperature as well as the content of alumina phase will be presented. |