荧光粉
锶
碱金属
材料科学
铈
碱土金属
亮度
制作
化学
分析化学(期刊)
矿物学
光电子学
冶金
光学
医学
物理
替代医学
有机化学
病理
色谱法
作者
R. Pappalardo,John Walsh,R.B. Hunt
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:1983-10-01
卷期号:130 (10): 2087-2096
被引量:36
摘要
In the search for alternative yellow emitting phosphors for the current commercial high brightness phosphor blends of the Lite‐White type, the authors have prepared and characterized by a variety of techniques an Sr‐analog of calcium fluoroapatite:Sb;Mn, with Ce replacing Sb as the sensitizer of the Mn emission. Materials with the desired emission characteristics are obtained from starting formulations containing a strong fluoride excess over the standard formulations for alkali‐earth apatites. Phosphors have been obtained with emission parameters closely approaching those of Yellow Halo (YH), and only 10% lower in brightness. Lamp tests on these phosphors revealed that the efficiency of the Ce‐Mn coactivated materials, as presently formulated, degrades as a result of the lamp‐making process. Preliminary observations related to the mechanism of phosphor degradation are reported. Possible commercial application in lamps of the wide class of Ce‐activated apatites crucially depends on identifying, and later eliminating, the degradation of phosphor efficiency during lamp fabrication.
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