Molten salt synthesis of YAG:Ce3+ phosphors from oxide raw materials
Molten salt synthesis of YAG:Ce3+ phosphors from oxide raw materials
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DOI：
10.1016/j.ceramint.2013.09.051
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发表时间：
2014-04
影响因子：
5.2
通讯作者：
Lin Gan;Zhiyong Mao;Fangfang Xu;Yingchun Zhu;Xue-jian Liu
中科院分区：
文献类型：
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作者：
Lin Gan;Zhiyong Mao;Fangfang Xu;Yingchun Zhu;Xue-jian Liu
本研究以氧化物（Y2 O3、CeO 2和Al 2 O3）为原料，采用熔盐法（MSS）制备YAG：Ce 3+荧光粉。YAG相的形成强烈依赖于氧化铝源和烧成温度。显微结构分析表明，YAG在碱金属氯化物熔体中的形成过程主要是“溶解-沉淀”机制。因此，高活性的纳米Al 2 O3起始粉末促进其在熔体中的溶解，并保证YAG相而不是其他Y-Al-O化合物的溶质化学计量。在460 nm蓝光激发下，YAG：Ce 3+荧光粉在535 nm处具有典型的黄光发射峰，表明即使使用氧化物原料，MSS也是一种有前途的荧光粉制备方法。
In this study, we used oxides (Y2O3, CeO2and 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-Al2O3starting 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 nm 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.