Claims
- 1. A phosphor having a general formula (2NaF)(NaMg.sub.3 AlSi.sub.3 O.sub.10 F.sub.2):Tb.sub.x, where x is from about 0.03 to about 0.15.
- 2. The phosphor of claim 1 wherein x is about 0.09.
- 3. A phosphor having a general formula Na.sub.2 [Mg.sub.3-x,Mnx]Al.sub.2 Si.sub.2 O.sub.10 F.sub.2, where x is from about 0.0025 to about 0.10.
- 4. The phosphor of claim 3 wherein x is about 0.02.
- 5. A method of making a phosphor having a general formula Na.sub.2 (Mg.sub.3-x,Mn.sub.x)Al.sub.2 Si.sub.2 O.sub.10 F.sub.2 where x is from about 0.0025 to about 0.10 comprising the steps of forming a mixture of stoichiometric amounts of MgO, Al.sub.2 O.sub.3, SiO.sub.2, Na.sub.2 CO.sub.3, Na.sub.2 SiF.sub.6 or (NH.sub.4).sub.2 SiF.sub.6, and MnCO.sub.3 and firing the mixture at between about 700.degree. C. to about 1300.degree. C. for between about 12 hours to about 24 hours.
- 6. The method of claim 5 wherein the phosphor is refired in a reducing atmosphere containing 95% N.sub.2 and 5% H.sub.2.
- 7. A method of making a phosphor having a general formula (2NaF)(NaMg.sub.3 AlSi.sub.3 O.sub.10 F.sub.2):Tb.sub.x where x is from about 0.03 to about 0.15 comprising the steps of forming a mixture of stoichiometric amounts of MgO, Al.sub.2 O.sub.3, SiO.sub.2, Na.sub.2 CO.sub.3, Na.sub.2 SiF.sub.6 or (NH.sub.4).sub.2 SiF.sub.6, and Tb.sub.4 O.sub.7 and firing the mixture at between about 700.degree. C. to about 1300.degree. C. for between about 12 hours to about 24 hours.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 08/189,012, filed Jan. 28, 1994, now abandoned, which is a continuation-in-part of application Ser. No. 07/999,637, filed Dec. 31, 1992, now abandoned the disclosures of which are hereby incorporated by reference. This application is related to copending applications Ser. Nos. 08/425,848, 08/425,536, and 08/425,535, all filed Apr. 20, 1995.
Government Interests
The United States Government has rights in this invention pursuant to U.S. Government Contract No. DAAL01-92-C-0241.
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Foreign Referenced Citations (1)
Number |
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Country |
2307863 |
Dec 1976 |
FRX |
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Continuation in Parts (2)
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Number |
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Parent |
189012 |
Jan 1994 |
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Parent |
999637 |
Dec 1992 |
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