Synthesis of Ca3Sc2Si3O12:Ce3+ phosphor via newly developed emulsion route

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  • ENOMOTO Naoya
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • SAKAI Tetsuhiro
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • INADA Miki
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • TANAKA Yumi
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • HOJO Junichi
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University

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Ca3Sc2Si3O12:Ce3+ phosphor was synthesized by what we have named Emulsion–Evaporation (EE) method, where W/O emulsions of metallic ions and precipitants were mixed and condensed in a rotary evaporator. The EE-derived precursor was amorphous below 600°C and directly crystallized to CSS above 800°C without passing any impurity phases. SEM/EDS and 29Si-NMR analyses revealed that the EE process is superior in achieving homogeneity. Ca3Sc2Si3O12:Ce3+ phosphor fired at 1350°C showed higher fluorescent emission than those prepared by a normal precipitation (PP) without EE route and by a solid state (SS) synthesis.

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