マイクロゲル噴霧凍結乾燥法によるYVO_4:Eu^<3+>蛍光体の合成(<特集>水溶液科学に立脚したセラミックス合成プロセス)

概要

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In this work we applied a "micro-gel spray freeze-drying method" for synthesis of YVO_4:Eu^<3+> phosphor materials. The proposed approach combined usual freeze-drying technique with water soluble polymers: agarose, gelatin and PVA to reinforce the frozen particles due to gel formation. The nature and concentration of these water soluble compounds determine the structure of the gels, and thus it allows controlling microstructure of the ice particles. It was found that a polymer and its concentration affects the morphology of the primary particles and prevents aggregation of secondary particles during freeze-drying as well as during thermal treatment of the precursors in synthesis of YVO_4:Eu^<3+> phosphor.
社団法人日本セラミックス協会の論文
2007-12-01