| 摘要 |
A rare earth element activated divalent metal represented by the formula MIIFX.xSiO2:yLn wherein MII is at least one divalent metal selected from the group consisting of Ba, Ca, Sr, Mg, Zn and Cd; Ln is at least one rare earth element selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb, Er, Sm and Gd; X is at least one halogen selected from the group consisting of Cl, Br and I; x and y are numbers satisfying the condition 5x10-5</=x</=0.5 and of 0<y</=0.2, respectively. This phosphor has improved characteristics such as the high luminance of emission, the high powder fluidity and good afterglow property.
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