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    • 4. 发明授权
    • Rare earth element-activated, alkaline earth metal fluorohalide based stimulable phosphor, process and apparatus for the preparation thereof, and radiographic image conversion panel
    • 稀土元素活化碱土金属氟卤化物基可刺激磷光体,其制备方法和装置以及射线照相图像转换面板
    • US06383412B1
    • 2002-05-07
    • US09472076
    • 1999-12-23
    • Kazuhiro Hasegawa
    • Kazuhiro Hasegawa
    • C09K1108
    • G21K4/00C09K11/7705C09K11/772C09K11/7733C09K11/7748C09K11/7763G21K2004/06
    • Disclosed are a rare earth element-activated, alkaline earth metal fluorohalide based stimulable phosphor capable of producing high-quality images having a very high sharpness and exhibiting high sensitivity and erasure characteristics when used in radiographic image recording and reproduction, a process for preparing the phosphor, an apparatus for the preparation thereof, and a radiographic image conversion panel using the phosphor. More specifically, disclosed are a rare earth element-activated, alkaline earth metal fluorohalide based stimulable phosphor which is represented by the basic compositional formula: Ba1−x MIIx FX: yMI, zLn [wherein MII represents an alkaline earth metal; MI represents an alkaline metal; Ln represents a rare earth element; and x, y, and z represent numerals within the respective ranges of 0≦x≦0.5, 0≦y≦0.05, and 0
    • 本发明公开了一种稀土元素活化碱土金属氟卤化物的可刺激磷光体,其能够产生具有非常高的锐度的高质量图像,并且当用于放射线照相图像记录和再现时具有高灵敏度和擦除特性,制备荧光体的方法 ,其制备装置和使用该荧光体的射线照相图像转换面板。 更具体地,公开了由碱性组成式:Ba1-x MIIx FX:yMI,zLn表示的稀土元素活化碱土金属氟卤化物的可刺激磷光体[其中MII表示碱土金属; MI表示碱金属; Ln表示稀土元素; x,y和z表示0≤x≤0.5,0≤y≤0.05,0≤z≤0.2的各自的范围内的数字,其粒径中值粒径(Dm)为1 sigma / Dm为50%以下,σ为晶粒度分布的标准偏差,晶粒长宽比在1.0〜2.0的范围内,制备荧光体的方法,其制备装置 以及使用该荧光体的射线照相图像转换面板。
    • 5. 发明授权
    • Stabilized storage phosphors and radiographic screens
    • 稳定的储存荧光粉和射线照相屏幕
    • US5639400A
    • 1997-06-17
    • US656646
    • 1996-05-31
    • Luther Craig RobertsBarbara J. Fisher
    • Luther Craig RobertsBarbara J. Fisher
    • C09K11/02C09K11/77G21K4/00C09K11/61G01T1/10
    • G21K4/00C09K11/025C09K11/772C09K11/7733C09K11/7748C09K11/7763G21K2004/06
    • A stabilized storage phosphor is disclosed intended to be exposed to X-radiation and subsequently stimulated to emit light is disclosed. The storage phosphor is the product of firing a combination of species characterized by the relationship:MFX.sub.1-z I.sub.z.uM.sup.a X.sup.a :yA:eQ:tDwherein M is an alkaline earth; X is selected from the group consisting of Cl and Br; M.sup.a is an alkali; X.sup.a is a halide; A is selected from the rare earths Eu, Ce, Sm and Tb; Q is selected from among metal oxides; D is selected from elements 23 to 28 of the periodic table; z is from 1.times.10.sup.-4 to 1; u is from 0 to 1; y is from 1.times.10.sup.-4 to 0.1; e is from 0 to 1; and t is from 0 to 10.sup.-2. The storage phosphor is stabilized against decline of photostimulated luminescence intensities by the inclusion of a monocyclic compound having a molecular weight of less than 350, exhibiting both acid and base dissociation constants of less than 10.sup.-5 at 25.degree. C. and containing the following ring atoms: ##STR1## where N.sup.T represents a tertiary amine nitrogen atom, C.sup.1/2 represents primary or secondary carbon atom, O represents an oxy linkage, and Z represents a linking group providing two ring carbon atoms to complete a five-membered ring, An oxysulfur reducing can be employed in combination. The stabilized storage phosphor is useful in storage phosphor screens used to record imagewise exposures to X-radiation.
    • 公开了旨在暴露于X射线并随后被激发以发光的稳定存储荧光体。 储存磷光体是以下述关系为特征的物质的组合进行烧制的产物:MFX1-zIz.uMaXa:yA:eQ:tD其中M是碱土金属; X选自Cl和Br; 马是碱; Xa是卤化物; A选自稀土Eu,Ce,Sm和Tb; Q选自金属氧化物; D选自周期表的元件23至28; z为1×10 -4〜1; 你是从0到1; y为1×10 -4〜0.1; e为0〜1; t为0〜10-2。 存储磷光体通过包含分子量小于350的单环化合物在25℃下显示出小于10-5的酸和碱解离常数而稳定,防止光刺激的发光强度下降,并含有以下环 原子:其中NT表示叔胺氮原子,C + E,fra 1/2 + EE表示伯或仲碳原子,O表示氧键,Z表示提供两个环碳原子的连接基团 五元环,可以组合使用硫氧化硫。 稳定的储存磷光体可用于存储荧光屏,用于记录对X-辐射的成像曝光。