標題: 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
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: ceramics;optical materials;luminescence
公開日期: 1-Feb-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
起始頁: 446
結束頁: 450
Appears in Collections:Conferences Paper


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