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US4138529A
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Phosphors and X-ray image converters using the same
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1977-06-16
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Granted: 1979-02-06
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Expires: 1997-06-16
Abstract
Abstract A complex halide phosphor represented by the following composition formula and an X-ray image converter using the same: (Me.sub.1-f,Mg.sub.f )F.sub.2.aMe' X.sub.2.bKX'.cMe" SO.sub.4 :dEu 2+ ,eTb 3+ wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c, d, e and f are numbers defined by one of the following five combinations: 1. 0.80≦a 1 ≦1.50, 0.10≦b 1 ≦1.50, c 1 =0, 0.001≦d 1 ≦0.20, e 1 =0 and f 1 =0. 2. 0.30≦a 2 ≦1.50, 0.10≦b 2 ≦2.00, 0.01≦c 2 ≦1.00, 0.001≦d 2 ≦0.20, e 2 =0 and f 2 =0. 3. a 3 =1, b 3 =0, c 3 =0, 0.01≦d 3 ≦0.10, 0<e 3 ≦0.05 and f 3 =0. 4. a 4 =1, b 4 =0, c 4 =0, 0.001≦d 4 ≦0.20, e 4 =0 and 0<f 4 ≦1. 5. a 5 =1, 0<b 5 ≦1.5, c 5 =0, 0.001≦d 5 ≦0.20, e 5 =0 and 0<f 5 ≦1.
Inventors
- 👤 Etsuo Mori
- 👤 Keiji Shimiya
- 👤 Norio Miura
- 👤 Yujiro Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:37
CPC Classifications
G; G21; G21K; G21K4/00; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7713
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A complex halide phosphor represented by the composition formula MeF.sub.2 · aMe'X.sub.2 ·bKX'·cMe"SO.sub.4 :dEu.sup.2+ wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c, and d are numbers defined as follows: 0.30≦a≦1.50, 0.10≦b≦2.00, 0.01≦c≦1.00, 0.001≦d≦0.20.
Claim 2
Dependent Claim
65 words
A complex halide phosphor represented by the composition formula MeF.sub.2 · aMe'X.sub.2 ·bKX'·cMe"SO.sub.4 :dEu.sup.2+ wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c, and d are numbers defined as follows: 0.30≦a≦1.50, 0.10≦b≦2.00, 0.01≦c≦1.00, 0.001≦d≦0.20.
Claim 3
Dependent Claim
27 words
The complex halide phosphor as claimed in Claim 1 wherein said a, b, c and d are numbers meeting the condition of 0.80≦a≦1.20, 0.20≦b≦1.20, 0.05≦c≦0.40 and 0.01≦d≦0.10.
Claim 4
Dependent Claim
81 words
An X-ray image converter comprising a support and a fluorescent layer including a complex halide phosphor dispersed in a binder, the phosphor being represented by the composition formula MeF.sub.2.aMe'X.sub.2.bKX'.cMe"SO.sub.4 :dEu.sup.2+ wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c and d are numbers defined as follows: 0.30≦a≦1.50, 0.10≦b≦2.00, 0.01≦c≦1.00, 0.001≦d≦0.20.
Claim 5
Dependent Claim
81 words
An X-ray image converter comprising a support and a fluorescent layer including a complex halide phosphor dispersed in a binder, the phosphor being represented by the composition formula MeF.sub.2.aMe'X.sub.2.bKX'.cMe"SO.sub.4 :dEu.sup.2+ wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c and d are numbers defined as follows: 0.30≦a≦1.50, 0.10≦b≦2.00, 0.01≦c≦1.00, 0.001≦d≦0.20.
Claim 6
Dependent Claim
37 words
The X-ray image converter as claimed in claim 3 wherein said X-ray image converter is an intensifying screen and the amount of phosphor in said flurescent layer is from 10 mg/cm 2 to 200 mg/cm 2 .
Claim 7
Dependent Claim
28 words
The X-ray image converter as claimed in claim 4 wherein the amount of phosphor in said flurescent layer is from 20 mg/cm 2 to 150 mg/cm 2 .
Claim 8
Dependent Claim
27 words
The X-ray image converter as claimed in claim 3 wherein said a, b, c and d are numbers meeting the condition of 0.80≦a≦1.20, 0.20≦b≦1.20, 0.05≦c≦0.40 and 0.01≦d≦0.10.
Claim 9
Dependent Claim
37 words
The X-ray image converter as claimed in claim 6 wherein the X-ray image converter is an intensifying screen and the amount of phosphor in said fluorescent layer is from 10 mg/cm 2 to 200 mg/cm 2 .
Claim 10
Dependent Claim
28 words
The X-ray image converter as claimed in claim 7 wherein the amount of phosphor in the fluorescent layer is from 20 mg/cm 2 to 150 mg/cm 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |