Tarafder, Anal ; Annapurna, Kalyandurg ; Chaliha, Reenamoni Saikia ; Karmakar, Basudeb ; Tiwari, Vidya Sagar ; Gupta, Pradeep Kumar (2011) Effects of nano-LiTaO3 crystallization on the dielectric and optical properties in Er3+-doped Li2O-Ta2O5-SiO2-Al2O3 glasses International Journal of Applied Ceramic Technology, 8 (5). pp. 1031-1041. ISSN 1546-542X
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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1744-...
Related URL: http://dx.doi.org/10.1111/j.1744-7402.2010.02494.x
Abstract
The precursor glass of LiTaO3 nanocrystals was prepared in a new Er3+-doped Li2O-Ta2O5-SiO2-Al2O3 system by the melt-quench technique. They were isothermally crystallized at 680°C for 3-100 h to obtain nanostructured glass-ceramics. The X-ray diffraction and transmission electron microscopy confirm the nanocrystallization of LiTaO3 (16-34 nm) yielding transparent glass-ceramics. A steep rise in the dielectric constant with the heat-treatment time is attributed to ferroelectric LiTaO3 crystallization. Photoluminescence spectra exhibit the 4l13/2→ 4l15/2 emission transition of Er3+ ions at 1570 nm when excited at 984 nm. Its intensity and lifetime decrease with an increase in heat-treatment time due to concentration quenching effect.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to John Wiley and Sons. |
| ID Code: | 83456 |
| Deposited On: | 21 Feb 2012 13:08 |
| Last Modified: | 21 Feb 2012 13:08 |
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