Investigation of Fluorescence Degradation Mechanism of Hydrated BaMgAl10O17 : Eu2 + Phosphor

Eu Mossbauer measurements show that upon hydration, a significant fraction of divalent europium ions isoxidized. 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 dischargeduring the lamp life. A plausible mechanism of degradation of BAM caused by the intercalated water molecules is discussed.© 2005 The Electrochemical Society. DOI: 10.1149/1.2041927 All rights reserved.Manuscript submitted March 31, 2005; revised manuscript received May 12, 2005. Available electronically September 14, 2005.