Fabrication and Photoluminescence Characteristics of Eu3+-Doped Lu2O3 Transparent Ceramics
Authors: Chen, Qiwei; Shi, Ying; An, Liqiong; Chen, Jiyang; Shi, Jianlin
Source: Journal of the American Ceramic Society, Volume 89, Number 6, June 2006 , pp. 2038-2042(5)
Abstract:A novel co-precipitation process was adopted for the preparation of highly sinterable europium-doped lutetia powders using ammonium hydroxide (NH3·H2O) and ammonium hydrogen carbonate (NH4HCO3) as the mixed precipitant. The resultant powders calcined at 1000°C for 2 h showed good dispersity and excellent sinterability. Highly transparent polycrystalline lutetia ceramics with a relative density of ∼99.9% were fabricated by pressureless sintering in flowing H2 atmosphere at 1850°C for 6 h without any additives. The average grain sizes of the transparent material were estimated to be 50–60 μm. Optical in-line transmittance in the visible wavelength region for Lu2O3 ceramics (1 mm in thickness) reached 80%. The luminescence and decay behavior of the obtained transparent plate and the corresponding nanophosphors were also investigated.
Document Type: Research article
Publication date: 2006-06-01