Phosphor and image storage panel
First Claim
1. A divalent europium activated alkaline earth metal halide phosphor having the formula:
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space="preserve" listing-type="equation">M.sup.II X.sub.2.aM.sup.II X'"'"'.sub.2.bSiO;
xEu.sup.2+in which MII 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.
0 Assignments
0 Petitions
Accused Products
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 MII 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.
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Citations
26 Claims
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1. A divalent europium activated alkaline earth metal halide phosphor having the formula:
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space="preserve" listing-type="equation">M.sup.II X.sub.2.aM.sup.II X'"'"'.sub.2.bSiO;
xEu.sup.2+in which MII 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A divalent europium activated alkaline earth metal halide phosphor having the formula:
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space="preserve" listing-type="equation">M.sup.II X.sub.2.aM.sup.II X'"'"'.sub.2.bSnX".sub.2 ;
xEu.sup.2+in which MII 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. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. 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:
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space="preserve" listing-type="equation">M.sup.II X.sub.2.aM.sup.II X'"'"'.sub.2.bSiO;
xEu.sup.2+in which MII 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. - View Dependent Claims (15, 16, 17, 18, 19)
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20. 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:
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space="preserve" listing-type="equation">M.sup.II X.sub.2.aM.sup.II X'"'"'.sub.2.bSnX".sub.2 ;
xEu.sup.2+in which MII 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. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification