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    • 2. 发明授权
    • Photostimulable phosphors
    • 光致发光荧光粉
    • US5422220A
    • 1995-06-06
    • US243516
    • 1994-05-16
    • Paul LeblansAlbert D. AdriaensensMelvin TecotzkyJan A. Van den Bogaert
    • Paul LeblansAlbert D. AdriaensensMelvin TecotzkyJan A. Van den Bogaert
    • C09K11/00C09K11/61C09K11/77C09K11/85G21K4/00G03C5/16
    • G21K4/00C09K11/7791G21K2004/06Y10S430/146Y10S430/167Y10S430/168
    • A photostimulable phosphor of which the emission intensity at the stimulation wavelength of 550 nm is higher than the emission intensity at the stimulation wavelength of 600 nm, characterized in that said phosphor is a divalent europium activated barium fluorobromide containing as codopant samarium, and wherein the terminology barium fluorobromide stands for an empirical formula wherein (1) a minor part of the barium (less than 50 atom %) is replaced optionally by at least one metal selected from the group consisting of a monovalent alkali metal, a divalent alkaline earth metal other than barium, and a trivalent metal selected from the group consisting of Al, Ga, In, Tl, Sb, Bi, Y, and a rare earth metal selected from the group consisting of Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, (2) a minor part (less than 50 atom %) of the bromine is replaced by chlorine, and/or iodine, and (3) wherein fluorine is present stoichiometrically in a larger atom % than bromine taken alone or bromine combined with chlorine and/or iodine.
    • 激发波长为550nm的发光强度高于600nm的刺激波长下的发光强度的光激发性荧光体,其特征在于,所述荧光体是含有共价掺杂钐的二价铕活化的氟化溴化钡,其特征在于, 氟溴化钡代表经验式,其中(1)少部分钡(小于50原子%)被任选地由至少一种选自以下的金属替代:一价碱金属,除二价碱金属以外的二价碱土金属 钡和选自Al,Ga,In,Tl,Sb,Bi,Y和选自Ce,Pr,Nd,Gd,Tb,Dy,Ho的稀土金属的三价金属 ,Er,Tm,Yb和Lu,(2)溴的少量部分(小于50原子%)被氯和/或碘取代,(3)其中氟以比原子%更大的原子比存在化学计量比 溴或溴 ne与氯和/或碘结合。