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    • 4. 发明授权
    • Phosphor which emits light by the excitation of X-ray, and a X-ray
intensifying screen using the phosphor
    • 通过X射线激发发光的荧光体和使用该荧光体的X射线增强屏
    • US5250366A
    • 1993-10-05
    • US882243
    • 1992-05-08
    • Shigeharu NakajimaGenichi ShinomiyaMizuho TakedaSatoru Chikutei
    • Shigeharu NakajimaGenichi ShinomiyaMizuho TakedaSatoru Chikutei
    • C09K11/77C09K11/78
    • C09K11/7786C09K11/7702C09K11/7703C09K11/7767C09K11/7768C09K11/7769C09K11/7785
    • The phosphor and the X-rays intensifing screen according to the present inventin emit light by the excitation of X-ray, and they are used for medical and industrial radiography. In addition to the conventional contents of rare earth tantalate and/or rare earth niobate, the phosphor according to the present invention contains a determined quantity of divalent metal. This divalent metal content can make the improvement of the afterglow characteristic and the light emission characteristic of the phosphor. The phosphor according to the present invention is represented by the general formula (I) MyLn.sub.1 -x-(2/3)yDO.sub.4 : xR.sup.3+ (I). In the general formula above, M is at least one divalent metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn and Cd, Ln being at least one selected from the group consisting of Y, Gd, La, and Lu, D being either or both of Ta and Nb, R being at least one selected from the group consisting of Tm, Pr, Sm, Eu, Tb, Dy and Yb or the base substance is self-activating, and y is a value in the range 1.times.10.sup.-5 .ltoreq.y.ltoreq.1, and x is a value in the range 0.ltoreq.y.ltoreq.0.05.
    • 根据本发明的荧光体和X射线增强屏通过X射线的激发发光,并且它们用于医疗和工业射线照相。 除了稀土钽酸盐和/或稀土铌酸盐的常规含量之外,根据本发明的荧光体含有确定量的二价金属。 这种二价金属含量可以改善荧光体的余辉特性和发光特性。 根据本发明的荧光体由通式(I)MyLn1-x-(2/3)yDO4:xR3 +(I)表示。 在上述通式中,M是选自Be,Mg,Ca,Sr,Ba,Zn和Cd中的至少一种二价金属,Ln是选自Y,Gd,La, Lu,D是Ta和Nb中的一种或两种,R是选自Tm,Pr,Sm,Eu,Tb,Dy和Yb中的至少一种,或者碱物质是自激活的,y是 值在1x10-5
    • 6. 发明授权
    • Phosphor which emits light by the excitation of X-ray
    • 通过X射线激发而发光的荧光体
    • US4959174A
    • 1990-09-25
    • US324570
    • 1989-03-16
    • Shigeharu NakajimaGenichi ShinomiyaMizuho TakedaSatoru Chikutei
    • Shigeharu NakajimaGenichi ShinomiyaMizuho TakedaSatoru Chikutei
    • C09K11/77C09K11/78
    • C09K11/7702C09K11/7703C09K11/7767C09K11/7768C09K11/7769C09K11/7785C09K11/7786
    • The phosphor and the X-ray intensifying screen according to the present invention emit light by the excitation of X-rays and they are used for medical and industrial radiography. In addition to the conventional contents of rare earth tantalate and/or rare earth niobate, the phosphor according to the present invention contains a determined quantity of divalent metal. This divalent metal content can make the improvement of the afterglow characteristic and the light emission characteristic of the phosphor.The phosphor according to the present invention is represented by the general formula (I)MyLn.sub.1 -X-.sub.(2/3) yDO.sub.4 : xR.sup.3+ (I).In the general formula above, M is at least one divalent metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn and Cd, Ln being at least one selected from the group consisting of Y, Gd, La, and Lu, D being either or both of Ta and Nb, R being at least one selected from the group consisting of Tm, Pr, Sm, Eu, Tb, Dy and Yb or the base substance is self-activating, and y is a value in the range 1.times.10.sup.-5 .ltoreq.y.ltoreq.1, and x is a value in the range 0.ltoreq.y.ltoreq.0.05.
    • 根据本发明的荧光体和X射线增强屏通过X射线的激发发光,并且它们用于医疗和工业射线照相。 除了稀土钽酸盐和/或稀土铌酸盐的常规含量之外,根据本发明的荧光体含有确定量的二价金属。 这种二价金属含量可以改善荧光体的余辉特性和发光特性。 根据本发明的荧光体由通式(I)MyLn1-X-(2/3)yDO4:xR3 +(I)表示。 在上述通式中,M是选自Be,Mg,Ca,Sr,Ba,Zn和Cd中的至少一种二价金属,Ln是选自Y,Gd,La, Lu,D是Ta和Nb中的一种或两种,R是选自Tm,Pr,Sm,Eu,Tb,Dy和Yb中的至少一种,或者碱物质是自激活的,y是 值在1x10-5