| Investigation of Fluorescence Degradation Mechanism of Hydrated BaMgAl 10O 17:Eu 2+ Phosphor (2008) | |||||||||||||
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| We have investigated the degradation of BaMgAl 10O 17:Eu 2+ phosphor �BAM � using 151 Eu Mössbauer and fluorescence spectroscopic methods. The 151 Eu Mössbauer measurements show that upon hydration, a significant fraction of divalent europium ions is oxidized. The degradation process induced by the intercalated water molecules into the host lattice appears to be a unique process. It has many features that are both similar to and distinct from those induced by oxidation in air and those caused by discharge during the lamp life. A plausible mechanism of degradation of BAM caused by the intercalated water molecules is discussed. | |||||||||||||
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