کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155422 | 1666349 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Eu2+-activated blue-emitting glass phosphor derived from Eu3+ exchanged USY zeolites by thermal treatment in reducing atmosphere
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Eu2+-activated blue-emitting glass phosphor derived from Eu3+ exchanged USY zeolites by thermal treatment in reducing atmosphere Eu2+-activated blue-emitting glass phosphor derived from Eu3+ exchanged USY zeolites by thermal treatment in reducing atmosphere](/preview/png/10155422.png)
چکیده انگلیسی
In this work, we report a facile method to prepare Eu2+ activated blue-emitting glass phosphor via loading Eu3+ into USY (Na28Si168Al28O384·240H2O, Si/Al ratio=6) zeolites' cavities followed by thermal treatment in reducing atmosphere. The zeolites powders containing Eu3+ were treated at different temperatures from 800â¯Â°C to 1200â¯Â°C in flowing 5%H2 +â¯95%N2 ambient. The photoluminescence properties were investigated on aspects of the emission and excitation spectra, internal quantum efficiency (IQE), thermal stability and the fluorescence lifetime. The XRD patterns showed that the sample calcined at 950â¯Â°C was of pure glassy state. Under the broad 200-430â¯nm excitation, a strong blue emission band peaked at 451â¯nm with a full width of half maximum (FWHM) value of 74â¯nm was observed for this sample. Under the 365â¯nm excitation, the samples treated at different temperatures showed monotone red shift in the emission peak wavelengths with the thermal treatment temperature increasing. Transparent glass sheets were obtained from the glass phosphor powders by spark plasma sintering (SPS) at 1200â¯Â°C, 1250â¯Â°C and 1300â¯Â°C. The optical transmittance and thermal conductivity of transparent glass sheets were measured. The results indicated that this glass phosphor may be a potential candidate material for white LEDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19547-19553
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19547-19553
نویسندگان
Changda Gao, Hui Lin, Dawei Zhang, Ruijin Hong, Chunxian Tao, Zhaoxia Han,