Study of Intercalation of Water into BaMgAl10O17:Eu2+ (BAM) Blue Phosphor for Plasma Display Panels

Toshiaki ONIMARU  Shin'ya FUKUTA  Tomonari MISAWA  Koichi SAKITA  Keiichi BETSUI  

IEICE TRANSACTIONS on Electronics   Vol.E86-C    No.11    pp.2253-2258
Publication Date: 2003/11/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electronic Displays)
Category: PDP Technology
BAM,  blue phosphor,  crystal structure,  intercalation,  thermal analysis,  luminance degradation,  

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We investigated the intercalation of water into BaMgAl10O17:Eu2+ (BAM), a blue phosphor that is used in plasma display panels. The adsorption and desorption characteristics of water with BAM have hysteresis; showing that water is intercalated into BAM. Using thermal analysis techniques, we suggested that water hydrated to barium ions caused oxidation. We found that the water intercalated into BAM played an important role in the oxidation of Eu2+ between 450 and 600, and contributed to a 10% degradation of luminance. In contrast, oxidation due to oxygen is a principal factor in degradation above 600 through baking process in air.