Europium doped transparent glass ceramics containing CaF2 micron-sized crystals: structural and optical characterization
Europium doped transparent glass ceramics containing CaF2 micron-sized crystals: structural and optical characterization
复制标题
含有 CaF2 微米级晶体的掺铕透明玻璃陶瓷：结构和光学表征
DOI：
10.1039/c6ra10288c
复制
发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Zhang, Long
中科院分区：
文献类型：
--
作者：
Jiang, Yiguang;Zhang, Pande;Zhang, Long
Transparent glass ceramics containing CaF2 micron-sized crystals were prepared using a modified liquid-phase sintering route. The morphology and microstructural evolution of the CaF2 crystals before and after liquid-phase sintering were examined using X-ray diffraction, field-emission scanning electron microscopy and transmission microscopy. After sintering at 800 °C for 10 min, the CaF2 crystals were approximately 20 μm in size and were uniformly distributed throughout a precursor glass prepared using melt-quenching method. The glass ceramic containing CaF2 micron-sized crystals prepared using liquid-phase sintering achieved the highest in-line transmittance of 76% in the visible region and 92% in the near-IR region. High near-IR transmittance of glass ceramics was attributed to the matching of the refractive index of the precursor glass with that of CaF2 in the near-IR region. The luminescence properties and local environment of Eu3+ in the precursor glass and glass ceramic were investigated using photoluminescence spectra, photoluminescence lifetimes and phonon sideband spectroscopy, and the results determined that some of the Eu3+ ions in the precursor glass incorporate into CaF2 micron-sized crystals after sintering and enter C4v site symmetry.
