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US 6,302,959 B2Granted
Mn2+ activated green emitting SrAl12O19 luminescent material
AssigneeGeneral Electric Company
InventorsAlok Mani Srivastava, Holly Ann Comanzo, Douglas Allen Doughty, William Winder Beers
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Abstract
A SrAl12O19 green luminescent material is doped with Mn2+ activator ions and at least one trivalent rare earth sensitizer ion species. Preferably, the material contains four rare earth ions: Ce3+, Pr3+, Gd3+ and Tb3+. Optionally, a portion of the aluminum may be substituted with magnesium. The material may be used as a display device or lamp phosphor or as an X-ray diagnostic or laster scintillator.
Claims5
A method of making a scintillator, comprising the steps of:
- placing a single crystal seed in contact with a melt comprising strontium, aluminum, oxygen, manganese and at least one of magnesium, gallium, barium, calcium, boron, cerium, praseodymium, gadolinium and terbium;
- moving the seed from a high temperature zone to a low temperature zone;
- and
- forming a single crystal scintillator in contact with the seed.
1 more element
Dependencies are inferred from the claim text.