Combinatorial synthesis of phosphors using arc-imaging furnace

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Abstract

We have applied a novel 'melt synthesis technique' rather than a conventional solid-state reaction to rapidly synthesize phosphor materials. During a synthesis, the mixture of oxides or their precursors is melted by light pulses (10-60 s) in an arc-imaging furnace on a water-cooled copper hearth to form a globule of 1-5 mm diameter, which is then rapidly cooled by turning off the light. Using this method, we synthesized several phosphor compounds including Y3Al5O12:Ce(YAG) and SrAl 2O4:Eu,Dy. Complex phosphor oxides are difficult to produce by conventional solid-state reaction techniques because of the slow reaction rates among solid oxides; as a result, the oxides form homogeneous compounds or solid solutions. On the other hand, melt reactions are very fast (10-60 s) and result in homogeneous compounds owing to rapid diffusion and mixing in the liquid phase. Therefore, melt synthesis techniques are suitable for preparing multi component homogeneous compounds and solid solutions. © 2011 National Institute for Materials Science.

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Ishigaki, T., Toda, K., Yoshimura, M., Uematsu, K., & Sato, M. (2011). Combinatorial synthesis of phosphors using arc-imaging furnace. Science and Technology of Advanced Materials, 12(5). https://doi.org/10.1088/1468-6996/12/5/054205

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