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자료유형
학술저널
저자정보
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.21 No.2
발행연도
2015.1
수록면
324 - 329 (6page)

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YAG:Ce3+ phosphor powders were synthesized using Al2O3 seeds to control the powder morphology andsize through solution chemical processing. A PVA solution was added to slurry-type precursors for homogeneousmixing and to prevent severe clustering. In this study three kinds of alumina seeds were employed: angular,agglomerated, and fused powders. Nitrate metal salts were used as the sources for yttrium and cerium. Thedried precursors were calcined at 500°C and then heated at 1400°C~1500°C in a N2/H2 atmosphere. Thecharacteristics of the final powders were examined by XRD, SEM, a PL analysis and a PKG test. All synthesizedpowders were crystallized to a YAG phase without an intermediate phase of YAM or YAP. The phosphorproperty and morphology of the synthesized powders were strongly dependent on the seed type. The phosphorpowder prepared from angular-type Al(OH)3 seed powder showed a fluorescence property on par with thatof a commercial powder. The powder morphology was successfully controlled to a near spherical form withan average particle size of 10~20 μm.

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