Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 3, Pages 5067-5071Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.09.051
Keywords
Phosphor; YAG:Ce3+; Molten salt synthesis
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Funding
- National Natural Science Foundation of China [51272270, 60936001, 51102265]
- National Basic Research Program of China [2009CB939904]
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In this study, we used oxides (Y2O3, CeO2 and Al2O3) as the raw materials to fabricate YAG:Ce3+ phosphors by a molten salt synthesis (MSS) method. The formation of YAG phase strongly depends on the alumina source and firing temperature. Microstructure characterization indicates that dissolution-precipitation mechanism dominates the formation process of YAG in the alkali chlorides melt. Thus, highly active nano-Al2O3 starting powders promote their solution in the melt and guarantee a solute stoichiometric of YAG phase rather than other Y-Al-O compounds. The as-prepared YAG:Ce3+ phosphors show typical yellow emission peaked at 535 inn under excitation of 460 nm blue light, suggesting that MSS could be a promising method for the preparation of phosphor powders even though oxide raw materials are used. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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