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A phosphor for plasma display panel, BaMgAl/sub 10/O/sub 17/:Eu/sup 2+/, showing a blue emission band at about 450 nm, was prepared by a solid-state reaction using BaCO/sub 3/, Al/sub 2/O/sub 3/, MgO, Eu/sub 2/O/sub 3/ as starting materials with flux AlF3. Concentration quenching decreased of emission intensity was shown at about 2.25/spl sim/2.3 wt% of Eu due to a decrease in the critical distance...
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