Fabrication and spectral properties of Dy:Y2O3 transparent ceramics

• Main Authors: Hu, Zongwen, Xu, Xiaodong, Wang, Jun, Liu, Peng, Li, Dongzhen, Wang, Xiaodan, Zhang, Jian, Xu, Jun, Tang, Dingyuan
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Electrical and electronic engineering; Dy:Y2O3; Transparent Ceramic
• Online Access: https://hdl.handle.net/10356/139734
• Institution: Nanyang Technological University

Dy3+-doped Y2O3 ceramics were fabricated by Spark Plasma Sintering method. The effect of sintering temperature on the microstructure and the optical transmittance of the ceramics was studied. The maximum in-line transmittance of Dy:Y2O3 ceramics with thickness of 1 mm was 74.5% at 574 nm when sintering temperature was 1550 ℃. The spectroscopic parameters were determined by Judd-Ofelt theory based on the room temperature absorption spectra. The peak emission cross section for the 4F9/2 → 6H13/2 transition was calculated to be 0.569 × 10−20 cm2. The fluorescence decay curve and quantum efficiency of the 4F9/2 multiplet were measured to be 269.2 μs and 37.1%, respectively.