[摘要]：Transparent glass-ceramics containing YLiF(4) nano-crystals were synthesized by controlled heat-treatments of LiF-YE(3)-Al(2)O(3)-SiO(2) glass. The crystallite size estimated to be about 8 nm was much less than the wavelength of the visible light. The transmittance of the glass-ceramic with a thickness of 2 mm was more than 85% at 400 nm and as high as 95% in the infrared region. The fluorescence centered around 1000 nm was hardly observed from Er(3+)-doped precursor glass under 800 nm excitation, while the emission with the Stark spitting was clearly observed for the Er-doped glass-ceramic. The phonon sideband of the (7)F(0)->(5)D(2) excitation spectra of Eu(3+) reveals that Eu(3+) doped in precursor glass is in silicate network while Eu(3+) doped in the glass-ceramic is in not only silicate framework but also fluoride framework. These results indicate that rare-earth ions such as Er(3+) and Eu(3+) could be successfully incorporated into YLiF(4) nano-crystals in the glass-ceramics. (C) 2011 Elsevier B.V. All rights reserved.
