1. Molten salt synthesis of YAG:Ce3+ phosphors from oxide raw materials.
- Author
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Gan, Lin, Mao, Zhi-Yong, Xu, Fang-Fang, Zhu, Ying-Chun, and Liu, Xue-Jian
- Subjects
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CERIUM oxides , *FUSED salts , *PHOSPHORS , *RAW materials , *MICROFABRICATION , *INORGANIC synthesis , *METAL microstructure , *STOICHIOMETRY - Abstract
Abstract: 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 535nm under excitation of 460nm blue light, suggesting that MSS could be a promising method for the preparation of phosphor powders even though oxide raw materials are used. [Copyright &y& Elsevier]
- Published
- 2014
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