Aluminate Green Phosphor with Small Particle Size Used for PDP via Co-Precipitation Method

Abstract:

Mg doped BaAl₁₂O₁₉:Mn²⁺ phosphor is one of the most efficient green phosphors for PDP. It is difficult to prepare the phosphor both have small particle size (< 3μm) and high luminescence. In the present work, a BaAl₁₂O₁₉:Mn²⁺ phosphor with small particle size was synthesized by the chemical co-precipitation method. Phase transformation and particle growth process during calcining process were investigated. The nucleation process was also discussed. The results show that, the phase transformation is complicated, the transition phases include BaCO₃, γ-Al₂O₃, BaF₂, BaAl₂O₄ and two phases contain Mn; The BaAl₁₂O₁₉ phase is formed from the reaction between BaAl₂O₄ phase and γ-Al₂O₃ phase, no a-Al₂O₃ phase appears during the entire process; The formation temperature of pure BaAl₁₂O₁₉ phase is 1200°C, which is lower than that in the high-temperature solid state reaction method. High efficiency BaAl₁₂O₁₉:Mn²⁺ phosphor with small particle size (< 2μm) and hexagonal flaky shape can be prepared by this method.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 890-895
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.890
• Online since: July 2011
• Authors: Yan Dong, Yang Zhou, Xue Lin Han, Wei Jie Gu
• Keywords: Co-Precipitation, Morpholoy, Particle, PDP, Phosphor

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