Synthesis of BaMgAl10O17:Eu2+ particles with small grain size and regular morphology

Abstract

Abstract BAM (BaMgAl 10 O 17 :Eu 2+ ) is widely used in plasma display panel (PDP) as a blue-emitting phosphor. It is necessary to improve the grain size, morphology and dispersibility of BAM phosphor because of the development of high definition PDP. Moreover, the crystal growth mechanism during the synthesis process of BAM particle is not fully clarified. In this paper, we synthesize BAM phosphor by solid-state reaction method. The primary raw material α-Al 2 O 3 powder was prepared by precipitation method. The phase transitions and crystal growth process during the formation of BaMgAl 10 O 17 have been studied. The intermediate product BaAl 2 O 4 phase was synthesized at 1000 °C on the surface of α-Al 2 O 3 particles as coating. When temperature increased to 1300 °C, BaMgAl 10 O 17 phase was formed. The BaMgAl 10 O 17 particles keep the shape and dispersibility of α-Al 2 O 3 powder. The results show that BAM phosphor synthesized in this paper has a homogeneous grain size at around 2.5 μm, good dispersibility, regular morphology and good luminescence properties.