کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624442 1516419 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of flux on the properties of CaAl2O4:Eu2+, Nd3+ long afterglow phosphor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effect of flux on the properties of CaAl2O4:Eu2+, Nd3+ long afterglow phosphor
چکیده انگلیسی

The long afterglow phosphor CaAl2O4:Eu2+, Nd3+was prepared by high temperature solid-state reaction method under reducing atmosphere. The effect of flux H3BO3 on the crystal structure and luminescent properties of the phosphor was studied. Results of XRD indicate that the volume of unit cell becomes smaller, and then the crystal field is changed, which results in the easier transition of 4f-5d. On the other hand, H3BO3 addition is in favor of the formation of pure phase CaAl2O4. Both behaviors enhance the emission intensity of the obtained phosphor to some extent. But its emission peak does not shift evidently because the energy level difference of 4f-5d does not be changed obviously. Moreover, H3BO3 also affects the afterglow properties of this phosphor. The optimized content of H3BO3 is 0.06 mol/mol for the obtained phosphor with excellent properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 458, Issues 1–2, 30 June 2008, Pages 446–449
نویسندگان
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