Combinatorial synthesis of phosphors using arc-imaging furnace

Tadashi Ishigaki, Kenji Toda, Masahiro Yoshimura, Kazuyoshi Uematsu, Mineo Sato

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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.

Original languageEnglish
Article number054205
JournalScience and Technology of Advanced Materials
Volume12
Issue number5
DOIs
Publication statusPublished - 2011 Oct 1

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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