| 학회 |
한국재료학회 |
| 학술대회 |
2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 |
20권 2호 |
| 발표분야 |
F. 광기능/디스플레이 재료(Optical Functional and Display Materials) |
| 제목 |
Upconversion luminescence properties of Er3+/ Yb3+ in transparent α-Sialon ceramics |
| 초록 |
Transparent Er-α-Sialon and (Er, Yb)-α-Sialon ceramics were fabricated by hot pressed sintering method. As a result, Er-α-Sialon ceramics showed better transparency as well as upconversion luminescence. Due to the smaller cationic size of Yb3+ than that of Er3+, the α-Sialon formed with Yb2O3 addition was Yb3+ stabilized α-Sialon. The Yb3+ ions in α-Sialon grains did not play any positive role in upconversion process. Thus upconversion luminescence was lower than that of only Er3+ stabilized α-Sialon ceramics. The transparency was higher in Er3+ stabilized Sialon, more than 60% in visible light region, than that of Yb3+ stabilized Sialon ceramics. The mechanical properties were also investigated in this study. |
| 저자 |
Bhupendra Joshi1, Gobinda Gyawali2, Yuwaraj K. Kshetri1, Soo Wohn Lee2
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| 소속 |
1Research Center for Eco Multi-Functional Nano Materials, 2Sun Moon Univ. |
| 키워드 |
Sialon; Upconversion luminescence; Down-conversion luminescence; Sintering
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| E-Mail |
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