标题: | BaMgAl10O17 : Eu blue phosphors with MgO coating and microwave irradiation |
作者: | Kuo, Kuan-Ting Lee, Shu-Ping Chen, San-Yuan Cheng, Bing-Ming Lu, Hsiao-Chi Liu, Dean-Mo Ting, Chu-Chi 材料科学与工程学系 Department of Materials Science and Engineering |
关键字: | ceramics;optical materials;luminescence |
公开日期: | 1-二月-2008 |
摘要: | Europium-activated barium magnesium aluminate (BaMgAl10O17:Eu (BAM)) phosphor particles were modified by surface coating with MgO using a polyol method. The photoluminescence (PL) properties of the MgO-coated BAM phosphors showed slightly improved blue-emission intensity compared to the unmodified ones, and reached a stronger peak intensity with 5.25% MgO coating, under vacuum ultraviolet (VUV) 147 nm excitation. Upon microwave irradiation on the MgO-coated BAM phosphors, the PL properties of the MgO-coated phosphors exhibited a much enhanced relative PL ratio, and a maximum relative PL ratio can be achieved when as high as 10.5% MgO was deposited on the phosphor surface. However, for mechanically ground phosphor powder, it was found that although the intensity of the MgO-coated BAM turned stronger with increasing MgO concentration under microwave irradiation, the purity of the resulting luminescence was slightly disrupted by the presence of a new peak near 470 nm, corresponding to BaMg3Al14O25 compound. (C) 2007 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.jpcs.2007.11.027 http://hdl.handle.net/11536/30176 |
ISSN: | 0022-3697 |
DOI: | 10.1016/j.jpcs.2007.11.027 |
期刊: | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS |
Volume: | 69 |
Issue: | 2-3 |
起始页: | 446 |
结束页: | 450 |
显示于类别: | Conferences Paper |
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