US4216408A
Expired / Lapsed
US
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Luminescent material and discharge lamp and cathode ray tube containing the same
Assignee: US Philips Corp
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Filing: 1978-02-10
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Granted: 1980-08-05
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Expires: 1998-02-10
Abstract
Abstract A luminescent screen provided with a luminescent material having the hexagonal crystal structure, which material is an aluminate, a gallate or an aluminate gallate. The crystal structure of the luminescent material corresponds to that of at least one of the compounds β-aluminium, β"-alumina and the hexagonal ferrites. The luminescent material is activated by at least one of the elements manganese, europium, lead, thallium, cerium, indium, terbium, dysprosium and bismuth and is a ternary compound whose composition can be represented in the ternary phase diagram ABC in which A represents at least one of the oxides 1/4Na 2 O, 1/2K 2 O, 1/2Rb 2 O, 1/2Cs 2 O, CaO, SrO, BaO, 1/2La 2 O 3 , 1/2Ce 2 O 3 , 1/2Tb 2 O 3 , 1/2Dy 2 O 3 , 1/2Bi 2 O 3 , EuO, PbO, 1/2Tl 2 O and 1/2In 2 O, in which B represents at least one of the oxides Al 2 O 3 and Ga 2 O 3 in which up to 25 mol. % of the oxides denoted by B may be replaced by Sc 2 O.sub. 3 and in which C represents at least one of the oxides MgO, ZnO, BeO, 1/2LiAlO 2 and 1/2LiGaO 2 . The content of A is more than zero and less than that of B and the content of C is more than zero and less than 0.6.
Inventors
- 👤 Judicus M. P. J. Verstegen
- 👤 Johannus G. Verlijsdonk
- 👤 Emiel P. J. de Meester
- 👤 Willebrordus H. M. M. VAN DE Spijker
- 👤 Johannes G. Verriet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:25
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0838
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
177 words
A luminescent material having a hexagonal crystal structure corresponding to β-alumina, β"--alumina or the hexagonal ferrites, said luminescent material being activated by bivalent europium in the amount of from about 0.5 at.% to about 25 at.% of the metal of the oxide A in the ternary phase diagram ABC in FIG. 1, said luminescent material being a ternary compound having a composition coming within the sides of the quadrangle RBPQ in said ternary phase diagram ABC wherein A is at least one oxide selected from the group consisting of SrO and BaO, B is selected from the group consisting of Al 2 O 3 and a mixture of Al 2 O 3 and Ga 2 O 3 with at least 75 mol % of B being Al 2 O 3 and C is at least one oxide selected from the group consisting of ZnO and MgO, the content of A being about 0.04 to about 0.35, the content of B being about 0.43 to about 0.85 and the content of C being about 0.075 to about 0.36.
Claim 2
Dependent Claim
177 words
A luminescent material having a hexagonal crystal structure corresponding to β-alumina, β"--alumina or the hexagonal ferrites, said luminescent material being activated by bivalent europium in the amount of from about 0.5 at.% to about 25 at.% of the metal of the oxide A in the ternary phase diagram ABC in FIG. 1, said luminescent material being a ternary compound having a composition coming within the sides of the quadrangle RBPQ in said ternary phase diagram ABC wherein A is at least one oxide selected from the group consisting of SrO and BaO, B is selected from the group consisting of Al 2 O 3 and a mixture of Al 2 O 3 and Ga 2 O 3 with at least 75 mol % of B being Al 2 O 3 and C is at least one oxide selected from the group consisting of ZnO and MgO, the content of A being about 0.04 to about 0.35, the content of B being about 0.43 to about 0.85 and the content of C being about 0.075 to about 0.36.
Claim 3
Dependent Claim
22 words
A luminescent material of claim 1 of the formula Ba 0 .9 Eu 0 .1 Mg 2 Al 16 O 27 .
Claim 4
Dependent Claim
21 words
A luminescent material of claim 1 of the formula Sr 5 Eu 0 .5 Mg 6 Al 55 O 94 .
Claim 5
Dependent Claim
14 words
A low-pressure mercury vapor discharge lamp provided with the luminescent material of claim 1.
Claim 6
Dependent Claim
13 words
A high-pressure mercury discharge tube provided with the luminescent material of claim 1.
Claim 7
Dependent Claim
14 words
A low-pressure cadmium vapor discharge lamp provided with the luminescent material of claim 1.
Claim 8
Dependent Claim
147 words
A luminescent material having a hexagonal crystal structure corresponding to β--alumina, "--alumina or the hexagonal ferrites, said luminescent material being activated by bivalent manganese in the amount of from about 0.35 at.% to about 8.3 at.% of the metal of the oxide C of the ternary phase diagram ABC in FIG. 1, said luminescent material being a ternary compound having a composition coming within the sides of the quadrangle RBPQ in said ternary phase diagram ABC wherein A is at least one oxide selected from the group consisting of SrO and BaO, B is at least one oxide selected from the group consisting of Al 2 O 3 and Ga 2 O 3 and C is MgO, the content of A being about 0.09 to about 0.20, the content of B being about 0.60 to 0.82 and the content of C being about 0.05 to about 0.20.
Claim 9
Dependent Claim
147 words
A luminescent material having a hexagonal crystal structure corresponding to β--alumina, "--alumina or the hexagonal ferrites, said luminescent material being activated by bivalent manganese in the amount of from about 0.35 at.% to about 8.3 at.% of the metal of the oxide C of the ternary phase diagram ABC in FIG. 1, said luminescent material being a ternary compound having a composition coming within the sides of the quadrangle RBPQ in said ternary phase diagram ABC wherein A is at least one oxide selected from the group consisting of SrO and BaO, B is at least one oxide selected from the group consisting of Al 2 O 3 and Ga 2 O 3 and C is MgO, the content of A being about 0.09 to about 0.20, the content of B being about 0.60 to 0.82 and the content of C being about 0.05 to about 0.20.
Claim 10
Dependent Claim
20 words
A luminescent material of claim 7 of the formula BaMg 1 .9 Mn 0 .1 Al 16 O 27 .
Claim 11
Dependent Claim
47 words
A low-pressure vapor discharge lamp provided with the luminescent material of claim 7 wherein B is Ga 2 O 3 or a mixture of Al 2 O 3 and Ga 2 O 3 with at least 75 mol % of B being Ga 2 O 3 .
Claim 12
Dependent Claim
45 words
A cathode ray tube provided with the luminescent material of claim 7 wherein B is Al 2 O 3 or a mixture of Al 2 O 3 Ga 2 O 3 with at least 25 mol % of B being Al 2 O 3 .
Claim 13
Dependent Claim
188 words
A luminescent material having a hexagonal crystal structure corresponding to β--alumina, β"-alumina or the hexagonal ferrites, said luminescent material being activated by a mixture of bivalent europium in the amount of from about 3.1 at.% to about 75 at.% of the metal of the oxide A and bivalent manganese in the amount of from about 4 at.% to about 50 at.% of the metal of the oxide C of the ternary phase diagram ABC in FIG. 1, said luminescent material being a ternary compound a composition coming within the sides of the quadrangle RBPQ in said ternary phase diagram ABC wherein A is at least one oxide selected from the group consisting of SrO and BaO, B is selected from the group consisting of Al 2 O 3 and mixtures of Al 2 O 3 and Ga 2 O 3 with at least 75 mol % of B being Al 2 O 3 and C is MgO, the content of A being about 0.04 to about 0.20, the content of B being about 0.60 to about 0.82 and the content of C being about 0.05 to about 0.35.
Claim 14
Dependent Claim
188 words
A luminescent material having a hexagonal crystal structure corresponding to β--alumina, β"-alumina or the hexagonal ferrites, said luminescent material being activated by a mixture of bivalent europium in the amount of from about 3.1 at.% to about 75 at.% of the metal of the oxide A and bivalent manganese in the amount of from about 4 at.% to about 50 at.% of the metal of the oxide C of the ternary phase diagram ABC in FIG. 1, said luminescent material being a ternary compound a composition coming within the sides of the quadrangle RBPQ in said ternary phase diagram ABC wherein A is at least one oxide selected from the group consisting of SrO and BaO, B is selected from the group consisting of Al 2 O 3 and mixtures of Al 2 O 3 and Ga 2 O 3 with at least 75 mol % of B being Al 2 O 3 and C is MgO, the content of A being about 0.04 to about 0.20, the content of B being about 0.60 to about 0.82 and the content of C being about 0.05 to about 0.35.
Claim 15
Dependent Claim
26 words
A luminescent material of claim 11 of the formula Ba 0 .8 Eu 0 .2 Mg 1 .6 Mn 0 .4 Al 16 O 27 .
Claim 16
Dependent Claim
26 words
A luminescent material of claim 11 of the formula Ba 0 .8 Eu 0 .2 Mg 1 .4 Mn 0 .6 Al 16 O 27 .
Claim 17
Dependent Claim
22 words
A luminescent material of claim 11 of the formula Sr 7 .5 Eu 0 .5 Mg 5 MnAl 60 O 104 .
Claim 18
Dependent Claim
26 words
A luminescent material of claim 11 of the formula Sr 7 .4 Eu 0 .6 Mg 5 .55 Mn 0 .45 Al 60 O 104 .
Claim 19
Dependent Claim
14 words
A low-pressure mercury vapor discharge lamp provided with the luminescent material of claim 11.
Claim 20
Dependent Claim
13 words
A high-pressure mercury discharge tube provided with the luminescent material of claim 11.
Claim 21
Dependent Claim
14 words
A low-pressure cadmium vapor discharge lamp provided with the luminescent material of claim 11.
Claim 22
Dependent Claim
12 words
A cathode ray tube provided with the luminescent material of claim 11.
Claim 23
Dependent Claim
32 words
A luminescent material of the formula Ba 1 .6 Eu 0 .4 Zn 4 .2 Mn 0 .8 Al 32 O 55 wherein Eu and Mn are both in the bivalent state.
Claim 24
Dependent Claim
32 words
A luminescent material of the formula Ba 1 .6 Eu 0 .4 Zn 4 .2 Mn 0 .8 Al 32 O 55 wherein Eu and Mn are both in the bivalent state.
Claim 25
Dependent Claim
25 words
A luminescent material of the formula Ba 2 Zn 1 .993 Mn 0 .007 Ga 12 O 22 wherein Mn is in the bivalent state.
Claim 26
Dependent Claim
25 words
A luminescent material of the formula Ba 2 Zn 1 .993 Mn 0 .007 Ga 12 O 22 wherein Mn is in the bivalent state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |