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    Halophosphate phosphor and fluorescent lamp using the same
    1.
    发明公开
    Halophosphate phosphor and fluorescent lamp using the same 失效
    卤化磷酸盐和相同的使用荧光灯。

    公开(公告)号：EP0212064A2

    公开(公告)日：1987-03-04

    申请号：EP86105825.3

    申请日：1986-04-28

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Taya, Akira c/o Kabushiki Kaisha Toshiba ,  Narita, Kazuo c/o Kabushiki Kaisha Toshiba ,  Hagiwara, Yasuhiko c/o Kabushiki Kaisha Toshiba ,  Hatakeyama, Keiji c/o Kabushiki Kaisha Toshiba

    IPC分类号： C09K11/73 ,  H01J61/44

    CPC分类号： C09K11/71 ,  C09K11/7796 ,  H01J61/44

    摘要： Disclosed is a halophosphate phosphor activated with divalent europium, which is represented by the formula:
    wherein M represents three alkaline earth metals consisting of barium, calcium and magnesium; X represents at least one of fluorine, chlorine and bromine; RE represents at least one of rare earth elements selected from the group consisting of ytterbium, neodymium, samarium, dysprosium, holmium and thulium; and a and b each represent a positive number of less than 5.
    Disclosed is also a fluorescent lamp which comprises a glass tube and a mixture of a halophosphate phosphor activated with divalent europium represented by the above formula and a strontium-magnesium orthophosphate phosphor activated with tin represented by the formula: (Sr,Mg) 3 (P0 4 ) 2 :Sn, the mixture being cated on inside wall of the glass tube.
    The halophosphate phosphor of this invention can decrease to a greater extent the afterglow as compared with those known in the prior art, without loss of the luminescence intensity. The fluorescent lamp of this invention has large initial luminous flux and luminous flux-maintaining efficient, color rendering at 4,200 to 5,600 K classified into the EDL type, afterglow time being shortened to the level at which any problem does not arise in practical use.