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US 6,210,605 B1Granted
Mn2+ activated green emitting SrAL12O19 luminiscent 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 laser scintillator.
Claims27
A composition of matter comprising:
- AD12O19:Mn,R
- wherein A comprises at least one of strontium, barium, and calcium;
- D comprises at least one of aluminum, boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion other than cerium.
2 more elements
A composition of matter comprising:
- (A1-xRx)(D12-zMnz)O19
- wherein A comprises at least one of strontium, barium, and cazlcium;
- D comprises at least one of aluminum, boron, gallium, and magnesium;
- R comprises at least one trivalent rare earth ion;
- and
- 0<x<1 and 0<z≦0.5.
3 more elements
A method of making a phosphor having a composition of
- AD12O19:Mn,R
- wherein A comprises at least one of strontium, barium, and calcium;
- D comprises at least one of aluminum, boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion other than cerium:
- said method comprising the steps of:
- mixing together
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one metal selected from the group consisting of strontium, barium, and calcium;
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one material selected from the group consisting of aluminum, boron, gallium, and magnesium;
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one rare earth metal selected from the group consisting of praseodymium, gadolinium, and terbium;
- and
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of manganese to result in a mixture;
- and
- heating the mixture to form the phosphor.
11 more elements
A composition of matter comprising:
- AD12O19:Mn,R
- wherein A comprises strontium and at least one other material selected from the group consisting of barium and calcium;
- D comprises at least one material selected from the group consisting of aluminum, boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion selected from the group consisting of cerium, praseodymium, gadolinium, and terbium.
2 more elements
A composition of matter comprising:
- AD12O19:Mn,R
- wherein A comprises strontium;
- D comprises at least one material selected from the group consisting of boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion selected from the group consisting of cerium, praseodymium, gadolinium, and terbium.
2 more elements
A composition of matter comprising:
- AD12O19:Mn,R
- wherein A comprises at least one material selected from the group consisting of barium and calcium;
- D comprises at least one material selected from the group consisting of aluminum, boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion selected from the group consisting of cerium, praseodymium, gadolinium, and terbium.
2 more elements
A method of making a phosphor having a composition of
- AD12O19:Mn,R
- wherein A comprises at least one of barium and calcium;
- D comprises at least one of aluminum, boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion other than cerium;
- said method comprising the steps of:
- mixing together
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one metal selected from the group consisting of barium and calcium;
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one material selected from the group consisting of aluminum, boron, gallium, and magnesium;
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one rare earth metal selected from the group consisting of cerium, praseodymium, gadolinium, and terbium;
- and
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of manganese to result in a mixture;
- and
- heating the mixture to form the phosphor.
11 more elements
A method of making a phosphor having a composition of
- AD12O19:Mn,R
- wherein A comprises strontium;
- D comprises at least one of boron, gallium, and magnesium;
- and
- R comprises at least one trivalent rare earth ion;
- said method comprising the steps of:
- mixing together
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of strontium;
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one material selected from the group consisting of boron, gallium, and magnesium;
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of at least one rare earth metal;
- and
- at least one compound selected from the group consisting of oxide, carbonate, hydroxide, nitrate, and oxalate of manganese to result in a mixture;
- and
- heating the mixture to form the phosphor.
11 more elements
Dependencies are inferred from the claim text.