US5198679A
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Phosphor and image storage panel
Assignee: Fujifilm Holdings Corp
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Filing: 1989-03-06
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Granted: 1993-03-30
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Expires: 2009-03-06
Abstract
Abstract A divalent europium activated alkaline earth metal halide phosphor having the formula (I): M.sup.II X.sub.2 ·aM.sup.II X'.sub.2 ·bA:xEu.sup.2+(I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; A is a compound selected from the group consisting of SiO and SnX" 2 wherein X" is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the conditions of 0<b≦3×10 -2 in the case of A being SiO and 0<b≦10 -3 in the case of A being SnX" 2 . A process for the preparation of said phosphor, a radiation image recording and reproducing method utilizing said phosphor, and a radiation image storage panel employing said phosphor are also disclosed.
Inventors
- 👤 Takayuki Katoh
- 👤 Yuichi Hosoi
- 👤 Kenji Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:45
CPC Classifications
G; G21; G21K; G21K4/00; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7732; C09K11/7733; C09K11/77342; G21K2004/06
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
83 words
A divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSiO:xEu.sup.2+ in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the condition of 0<b≦3×10 -2 .
Claim 2
Dependent Claim
83 words
A divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSiO:xEu.sup.2+ in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the condition of 0<b≦3×10 -2 .
Claim 3
Dependent Claim
22 words
The phosphor as claimed in claim 1, in which b is a number satisfying the condition of 10 -4 ≦b≦10 -2 .
Claim 4
Dependent Claim
18 words
The phosphor as claimed in claim 1, in which a is a number satisfying the condition of 0.25≦a≦6.0.
Claim 5
Dependent Claim
13 words
The phosphor as claimed in claim 1, in which M II is Ba.
Claim 6
Dependent Claim
18 words
The phosphor as claimed in claim 1, in which each of X and X' is Cl or Br.
Claim 7
Dependent Claim
22 words
The phosphor as claimed in claim 1, in which x is a number satisfying the condition of 10 -5 ≦x≦10 -1 .
Claim 8
Dependent Claim
99 words
A divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSnX".sub.2 :xEu.sup.2+ in which M II is at least one alkaline earth metal selected form the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the condition 0<b≦10 -3 .
Claim 9
Dependent Claim
99 words
A divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSnX".sub.2 :xEu.sup.2+ in which M II is at least one alkaline earth metal selected form the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the condition 0<b≦10 -3 .
Claim 10
Dependent Claim
22 words
The phosphor as claimed in claim 7, in which b is a number satisfying the condition of 10 -5 ≦b≦5×10 -4 .
Claim 11
Dependent Claim
12 words
The phosphor as claimed in claim 7, in which X" is F.
Claim 12
Dependent Claim
18 words
The phosphor as claimed in claim 7, in which a is a number satisfying the condition of 0.25≦a≦6.0.
Claim 13
Dependent Claim
13 words
The phosphor as claimed in claim 7, in which M II is Ba.
Claim 14
Dependent Claim
18 words
The phosphor as claimed in claim 7, in which each of X and X' is Cl or Br.
Claim 15
Dependent Claim
22 words
The phosphor as claimed in claim 7, in which x is a number satisfying the condition of 10 -5 ≦x≦10 -1 .
Claim 16
Dependent Claim
113 words
A radiation image storage panel comprising a support and a phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which said phosphor layer contains a divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSiO:xEu.sup.2+ in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the conditions of 0<b≦3×10 -2 .
Claim 17
Dependent Claim
113 words
A radiation image storage panel comprising a support and a phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which said phosphor layer contains a divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSiO:xEu.sup.2+ in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the conditions of 0<b≦3×10 -2 .
Claim 18
Dependent Claim
25 words
The radiation image storage panel as defined in claim 14, in which b is a number satisfying the condition of 10 -4 ≦b≦10 -2 .
Claim 19
Dependent Claim
21 words
The radiation image storage panel as defined in claim 14, in which a is a number satisfying the condition of 0.25≦a≦6.0.
Claim 20
Dependent Claim
16 words
The radiation image storage panel as defined in claim 14, in which M II is Ba.
Claim 21
Dependent Claim
21 words
The radiation image storage panel as defined in claim 14, in which each of X and X' is Cl or Br.
Claim 22
Dependent Claim
25 words
The radiation image storage panel as defined in claim 14, in which x is a number satisfying the condition of 10 -5 ≦x≦10 -1 .
Claim 23
Dependent Claim
132 words
A radiation image storage panel comprising a support and a phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which said phosphor layer contains a divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSnX".sub.2 :xEu.sup.2+ in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X', wherein X" is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the conditions of 0<b≦10 -3 .
Claim 24
Dependent Claim
132 words
A radiation image storage panel comprising a support and a phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which said phosphor layer contains a divalent europium activated alkaline earth metal halide phosphor having the formula: M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSnX".sub.2 :xEu.sup.2+ in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X', wherein X" is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are numbers satisfying the conditions of 0.1≦a≦10.0 and 0<x≦0.2, respectively; and b is a number satisfying the conditions of 0<b≦10 -3 .
Claim 25
Dependent Claim
25 words
The radiation image storage panel as defined in claim 20, in which b is a number satisfying the condition of 10 -5 ≦b≦5×10 -4 .
Claim 26
Dependent Claim
15 words
The radiation image storage panel as defined in claim 20, in which X" is F.
Claim 27
Dependent Claim
21 words
The radiation image storage panel as defined in claim 20, in which a is a number satisfying the condition of 0.25≦a≦6.0.
Claim 28
Dependent Claim
16 words
A radiation image storage panel as defined in claim 20, in which M II is Ba.
Claim 29
Dependent Claim
21 words
A radiation image storage panel as defined in claim 20, in which each of X and X' is Cl or Br.
Claim 30
Dependent Claim
25 words
A radiation image storage panel as defined in claim 20, in which x is a number satisfying the condition of 10 -5 ≦x≦10 -1 .
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) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |