We have evaluated thermal stability of a BaAl2Si 2O8:Eu2+ (BAS:Eu2+), which have polymorph property such as hexagonal, monoclinic structure depending upon firing temperature. When both polymorph BAS:Eu2+ were baked in air at 500 °C for 30 min, the photoluminescence (PL) intensity of monoclinicBAS:Eu 2+ was maintained of the initial intensity. However, the PL intensity of hexagonalBAS:Eu2+ decreased significantly, corresponding to about 34%. From analyses of Rietveld refinement, the difference of thermal stability of both BAS:Eu2+ can be ascribed to both crystal structure of host materials and the average inter-atomic distances between Eu2+ ion and oxygen their crystal structure which plays a key role of shield for Eu 2+ ions against oxidation atmosphere.
|Number of pages||4|
|Journal||Proceedings of International Meeting on Information Display|
|State||Published - 2006 Dec 1|
|Event||5th International Meeting on Information Display - Seoul, Korea, Republic of|
Duration: 2005 Jul 19 → 2005 Jul 23