폴리머용액법 및 알루미나 seed를 도입한 YAG:Ce3+ 형광체 분말 합성
Synthesis of YAG:Ce3+ Phosphor Powders by Polymer Solution Route and Alumina Seed Application
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YAG:Ce3+ phosphor powders were synthesized using a Al2O3 seed (average particle size: 5 μm) by the polymer solution route. PVA solution was added to the sol precursors consisting of the seed powder and metal nitrate salts for homogeneous mixing in atomic scale. All dried precursor gels were calcined at 500°C and then heated at 1400°C~1500°C in N2/H2 atmosphere. The final powders were characterized by using XRD, SEM, PSA, PL and PKG test. All synthesized powders were crystallized to YAG phase without intermediate phases of YAM or YAP. The phosphor properties and morphologies of the synthesized powders were strongly dependent on the PVA content. Finally, the synthesized YAG:Ce3+ phosphor powder heated at 1500°C, which is prepared from 12:1 PVA content and has an average particle size of 15 μm, showed similar phosphor properties to a commercial phosphor powder.
Abstract
YAG:Ce3+ phosphor powders were synthesized using a Al2O3 seed (average particle size: 5 μm) by the polymer solution route. PVA solution was added to the sol precursors consisting of the seed powder and metal nitrate salts for homogeneous mixing in atomic scale. All dried precursor gels were calcined at 500°C and then heated at 1400°C~1500°C in N2/H2 atmosphere. The final powders were characterized by using XRD, SEM, PSA, PL and PKG test. All synthesized powders were crystallized to YAG phase without intermediate phases of YAM or YAP. The phosphor properties and morphologies of the synthesized powders were strongly dependent on the PVA content. Finally, the synthesized YAG:Ce3+ phosphor powder heated at 1500°C, which is prepared from 12:1 PVA content and has an average particle size of 15 μm, showed similar phosphor properties to a commercial phosphor powder.
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