| 학회 |
한국재료학회 |
| 학술대회 |
2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 |
23권 1호 |
| 발표분야 |
D. 구조 재료 분과 |
| 제목 |
α-Sialon ceramics from structural to optical applications |
| 초록 |
α-Sialon ceramics are well known for highly stressed structural engineering applications owing to their inherently outstanding mechanical and thermo-chemical stability. However, the possibilities of the functional applications such as frequency upconversion in α-Sialon ceramics have been scarcely investigated. Here, we report very intense visible and near-infrared frequency upconversion as well as frequency downconversion photoluminescence emissions for the first time in various lanthanide doped α-Sialon ceramics under near-infrared excitations. The α-Sialon ceramics are prepared by hot press sintering technique. Efficient energy transfer processes between the dopant ions are found to be responsible for the observed photoluminescence emissions. The upconversion process is governed by two and three-photon absorption processes. These findings open the possibility of potential application of the lanthanide doped α-Sialon ceramics as optical materials in which efficient luminescent properties can co-exist along with the excellent mechanical and thermo-chemical stability. |
| 저자 |
Yuwaraj K. Kshetri, Soo Wohn Lee
|
| 소속 |
Sun Moon Univ. |
| 키워드 |
α-Sialon; hot pressing; upconversion; energy transfer; phonon
|
| E-Mail |
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