Effects of Particle Size and Type of Alumina onthe Morphology and Photoluminescence Properties ofSr4Al14O25:Eu2+/Dy3+Phosphor

[摘要] Sr4Al14O25:Eu2+/Dy3+phosphor with high luminescence intensity and long afterglow duration was synthesized using 1.0 μm (α), 0.1 μm (α), and 0.05 μm (γ) particle sizes ofAl2O3. SEM observation results showed that spike-like thin particles were formed when 0.05 μmγ-Al2O3was used as raw material. Hexagonal thick particles were observed when 0.1 μmα-Al2O3was used. But irregular, thin particles were observed while using 1 μmα-Al2O3. Photoluminescence measurements showed that both the initial intensity and the long persistency were much higher for the phosphor prepared usingγ-Al2O3of 0.05 μm particle size.

[学科分类] 材料工程