外文题目: Europium doped transparent glass ceramics containing CaF2 micron-sized crystals: structural and optical characterization
作者: Jiang, Yiguang; Zhang, Pande; Wei, Tao; Fan, Jintai; Jiang, Benxue; Mao, Xiaojian; Zhang, Long
刊名: RSC Adv.
年: 2016 卷: 6 期: 60 页： 55366--55373
英文关键词:

LIQUID-PHASE; ENERGY-TRANSFER; NANOCRYSTALS; EU3+; LUMINESCENCE; ALUMINA; IONS; SRF2; DENSIFICATION; NANOPARTICLES
英文摘要:
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 degrees C for 10 min, the CaF2 crystals were approximately 20 mm 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 C-4v site symmetry.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1039/c6ra10288c


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