| 摘要 |
PROBLEM TO BE SOLVED: To provide a chemically stable new phosphor which emits yellow light having high luminance under various excitation conditions, especially UV light excitation condition. SOLUTION: This phosphor comprises an aluminosilicate compound of the following composition formula having a nephelite type crystal structure activated with divalent europium. a(Na1-x-2y , Kx , Euy )2 O.bAl2 O3 .2SiO2 [(a), (b), (x) and (y) are the numbers of 0<=(x)<=0.8, 0.005<=(y)<=0.1, 0<(x)+2(y)<=0.8, 0.8<=(a)<=1.2, 0.8<=(b)<=1.2].
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