کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398486 | 1505887 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photo-, thermo- and optically stimulated luminescence of monoclinic zirconia
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Photo-, thermo- and optically stimulated luminescence of monoclinic zirconia Photo-, thermo- and optically stimulated luminescence of monoclinic zirconia](/preview/png/5398486.png)
چکیده انگلیسی
We carried out a careful photoluminescence (PL) and thermoluminescence (TL) characterization of nominally pure monoclinic ZrO2 nanopowders subject to oxidative vs reductive annealing (up to 1450 °C). The two kinds of studied zirconia (sol-gel-prepared vs commercial powder) exhibited virtually identical 490 nm PL emission band and 280 nm PL excitation band with slight, but clearly detectable variations in the spectral shape. The TL glow peaks, recorded over the temperature range â100 to 300 °C, showed an interplay depending on the type and treatment of sample. There is a strong evidence that the â35 and 205 °C glow peaks are due to oxygen vacancies whereas the 5 °C glow peak may relate to oxygen interstitials and the 110 °C glow peak to surface defects. Although a number of distinct glow peaks emerge, the material still seems to contain a quasi-continuous distribution of trap depths. In comparison to TL, we also demonstrate effective optically stimulated luminescence (OSL) from this polymorph of ZrO2 under red and NIR illumination at ~1 W/cm2. All traps responsible for the principal TL peaks were also found to be OSL-active, which widens the applied importance of the material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 174, June 2016, Pages 49-55
Journal: Journal of Luminescence - Volume 174, June 2016, Pages 49-55
نویسندگان
Valter Kiisk, Laurits Puust, Kathriin Utt, Aarne Maaroos, Hugo Mändar, Erica Viviani, Fabio Piccinelli, Rando Saar, Urmas Joost, Ilmo Sildos,