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    • 2. 发明授权
    • Halophosphate phosphor and fluorescent lamp using the same
    • 卤磷磷光体和荧光灯使用相同
    • US4663563A
    • 1987-05-05
    • US855629
    • 1986-04-25
    • Akira TayaKazuo NaritaYasuhiko HagiwaraKeiji Hatakeyama
    • Akira TayaKazuo NaritaYasuhiko HagiwaraKeiji Hatakeyama
    • C09K11/71C09K11/73C09K11/77H01J61/44C09K11/477
    • C09K11/71C09K11/7796H01J61/44
    • Disclosed is a halophosphate phosphor activated with divalent europium, which is represented by the formula:M.sub.5-a X(PO.sub.4).sub.3 :Eu.sup.2+ (a),RE(b),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).sub.3 (PO.sub.4).sub.2 :Sn, the mixture being coated 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.
    • 公开了用二价铕活化的卤代磷酸盐荧光体,其由下式表示:M5-aX(PO4)3:Eu2 +(a),RE(b),其中M表示由钡,钙和镁组成的三种碱土金属; X表示氟,氯和溴中的至少一种; RE表示选自镱,钕,钐,镝,钬和th中的至少一种稀土元素; 并且a和b各自表示小于5的正数。还公开了一种荧光灯,其包括玻璃管和由上式表示的二价铕活化的卤代磷酸盐荧光体和由上式表示的锶 - 镁正磷酸盐荧光体的混合物, 锡(Sr,Mg)3(PO4)2:Sn表示的锡,混合物涂覆在玻璃管的内壁上。 与现有技术中已知的相比,本发明的卤代磷酸盐荧光体可以在更大程度上降低余辉,而不损失发光强度。 本发明的荧光灯具有较大的初始光通量和光通量保持效率,分色为EDL型的4,200至5,600K的显色性,余辉时间缩短到实际使用中不出现任何问题的程度。