Abstract
We report here the processing and properties of transparent glass and glass-ceramic nanocomposites in the Li 2 O―Ta 2 O 5 ―SiO 2 ― Al 2 O 3 system in the presence of Eu 2 O 3 as luminescent probe. The formation of the LiTa0 3 crystal phase, the crystallite size, and the morphology with the progression of heat treatment have been examined by X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transformed infrared reflectance spectroscopy measurements. The crystallite sizes obtained from XRD and TEM are found to increase with heat-treatment time and vary in the range of 2-20 nm. The measured phototuminescence spectra exhibit emission transitions of 5 D 0,1 → F j (j = 0, 1, 2, 3, and 4) of Eu 3+ ions. From the nature of the emission transitions, the site symmetry in the vicinity of Eu 3+ ions has been found to be near C 3v in the glass-ceramic nanocomposites. An inverse correlation has been observed between the asymmetric ratio (I ED /I MD ) of Eu 3+ ions and the dielectric constant (e r ), with an increase in the heat-treatment time of glass, which is caused by the dipole―dipole interaction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
