Phosphor and fluorescent lamp using the same

Details Phosphor and fluorescent lamp using the same Phosphor and fluorescent lamp using the same

1987-04-09

1988-03-22

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014F, 2523014R, 313486, C09K 11465, H01J 6144

Patent

active

047331267

ABSTRACT:
According to the present invention, there is provided a phosphor represented by a general formula (Ba.sub.w Ca.sub.x Mg.sub.y Eu.sub.z)O.aAl.sub.2 O.sub.3. bSiO.sub.2 where 0.1.ltoreq.w.ltoreq.0.5, 0.0004.ltoreq.x.ltoreq.0.0020, 0.1.ltoreq.y.ltoreq.0.8, 0.03.ltoreq.z.ltoreq.0.10, w+x+y+z=1, 1.5.ltoreq.a.ltoreq.4.5, and 0.0005.ltoreq.b.ltoreq.0.0030. The present invention provides a blue-color light-emitting aluminate phosphor which has a high emission output and a low decrease in its emission intensity during use, and a fluorescent lamp using the same.

REFERENCES:
patent: 3577169 (1971-05-01), Barry
patent: 3839219 (1974-10-01), Verstegen et al.
patent: 4150321 (1979-04-01), Schetters et al.
patent: 4161457 (1979-07-01), Takahashi et al.
patent: 4216408 (1980-08-01), Verstegen et al.
patent: 4315191 (1982-02-01), Konijnendijk et al.
patent: 4590405 (1986-05-01), Hoeks et al.

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