Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76303
Title: Optical, luminescent and optical temperature sensing properties of (K0.5Na0.5) NbO3-ErBiO3 transparent ceramics
Authors: Lin, C
Wu, X
Lin, M 
Huang, YP
Li, J
Keywords: KNN-EB
Transparent ceramic
Photoluminescence
Color-tunable
Optical temperature sensing
Issue Date: 2017
Publisher: Elsevier
Source: Journal of alloys and compounds, 2017, v. 706, p. 156-163 How to cite?
Journal: Journal of alloys and compounds 
Abstract: The lead-free 0.985(K0.5Na0.5) NbO3-0.015ErBiO(3) (KNN-EB-0.015) ceramic was fabricated by pressureless sintering. It possessed a pure perovskite phase with pseudo-cubic symmetry. Due to the fine-grains, small-sized pores, dense microstructure and relaxor-like characteristics, the ceramic was optically clear, exhibiting the highest transmittances of similar to 40% and similar to 71% in the visible and infrared regions, respectively. The photoluminescence (PL) properties of the ceramic were studied, including the up-conversion (UC) green and red emissions, down-conversion near infrared emission as well as the emission lifetimes. The color-tunable (from green to yellow) UC emissions were observed by increasing the temperature, based on the temperature-dependent emission spectra, which also exhibited good thermal stability (52.6% of the initial intensity at 453 K) of the ceramic. Additionally, the temperature sensing properties were investigated using the fluorescence intensity ratio technique. A maximum sensitivity of similar to 0.0048 K at 603 K was obtained. Combined with the good optical and electrical properties, the KNN-EB-0.015 transparent ceramic could be a promising candidate for multifunctional optoelectronic applications.
URI: http://hdl.handle.net/10397/76303
ISSN: 0925-8388
EISSN: 1873-4669
DOI: 10.1016/j.jallcom.2017.02.245
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