Long Decay phoaphors
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United States of America Patent
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Dec 27, 1994
Grant Date -
N/A
app pub date -
Jan 10, 1994
filing date -
Jun 10, 1994
priority date (Note) -
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Abstract
Long decay phosphors are disclosed that are comprised of rare-earth activated divalent, boron-substituted aluminates. In particular, the long decay phosphors are comprised of MO.a(Al.sub.1-b B.sub.b).sub.2 O.sub.3 :cR, wherein 0.5.ltoreq.a.ltoreq.10.0, 0.0001.ltoreq.b.ltoreq.0.5 and 0.0001.ltoreq.c.ltoreq.0.2, MO represents at least one divalent metal oxide selected from the group consisting of MgO, CaO, SrO and ZnO and R represents Eu and at least one additional rare earth element. Preferably, R represents Eu and at least one additional rare earth element selected from the group consisting of Pt, Nd, Dy and Tm.
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