Preparation and characterizations of Pr3+:CaF2 transparent ceramics with different doping concentrations |
| |
| Authors: | Guoqiang Yi Weiwei Li Jinghong Song Bingchu Mei Zhiwei Zhou Liangbi Su |
| |
| Affiliation: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. Center of Materials Research and Analysis, Wuhan University of Technology, Wuhan 430070, China;3. Key Laboratory of Transparent and Opto-Functional Advanced Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China |
| |
| Abstract: | 0.2–5.0?at% Pr3+-doped CaF2 transparent ceramics were fabricated by hot-pressed processing for the first time. The phase compositions, microstructure and optical characteristics of the presented transparent ceramics were examined systematically. The average in-line transmittance of Pr:CaF2 transparent ceramics (2.0?mm thick) with high Pr3+ doping concentrations (1.0–5.0?at%) exceeds 86% at the wavelength of 1200?nm. The absorption spectrum manifests that the prepared Pr:CaF2 transparent ceramics contain some absorption peaks overlapped with emission bands of the commercial InGaN laser diodes. Further, a detailed investigation on the visible emission properties as a function of Pr3+ concentrations in CaF2 transparent ceramics was reported. The emission spectra presented two main characteristic peaks at 496?nm (bluish green) and 656?nm (red) corresponded to the transitions of 3P0→3H4 and 3P0→3F2 for Pr3+ activator ions. With the increase of the Pr3+ doping concentrations, the emission intensity and decay lifetimes decreased generally attributed to the concentration quenching effect. Details on energy transfer mechanism of Pr3+ in CaF2 transparent ceramics were demonstrated and discussed. |
| |
| Keywords: | Transparent ceramic Praseodymium Calcium fluoride Luminescence properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
