Morphology control of blue-emitting BAM phosphor particles by the spray pyrolysis

분무열분해법에 의한 푸른색 발광 BAM 형광체 분말의 형태 조절

  • 강윤찬 (한국과학기술원 화학공학과) ;
  • 노현숙 (한국과학기술원 화학공학과)
  • Published : 1999.11.01

Abstract

The blue emitting BAM Phosphor Particles with various compositions were Prepared by the spray Pyrolysis. The effect of composition on the morphology of BAM particles was Investigated. In the case of BaMgAl$_{10}$ /O$_{22}$ : Eu$^{2+}$, the morphology of particles with sphericity and non-aggregation characteristics disappeared after post-treatment at 1400 $^{\circ}C$ for 3 hrs. On the other hand, the ocher composition particles except BaMgAl$_{10}$ /O$_{22}$ : Eu$^{2+}$ maintained their original morphology after post-treatment, even if the particles were prepared at low temperatures in the spray pryrolysis. The BAM particles with MgAl$_{2}$/O$_4$as intermediate material at low post-treatment temperature had high thermal stability and maintained sphericity of particles after post-treatment. All the samples had main omission peak at 450 nm, which corresponds to blue emission. The optimum post-treatment temperature of BAM:Eu$^{2+}$ particles for the maximum PL(photoluminescence) intensity in the spray pylolysis was 1200 $^{\circ}C$ because of high crystallinity, Phase-Purity, and good morphology.ology.

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