Yellow emitting phosphors, process for producing same and a...

Details Yellow emitting phosphors, process for producing same and a... Yellow emitting phosphors, process for producing same and a...

C - Chemistry, Metallurgy

09

K

31/130, 313/81

C09K 11/73 (2006.01) C09K 11/77 (2006.01) H01J 61/44 (2006.01)

Patent

CA 1193088

Abstract of the Disclosure Yellow emitting fluorescent lamp phosphors comprise cerium and manganese activated calcium-strontium fluoro- apatite compositions represented by the approximate formula Image wherein t is from 0 to l v is from about 4.12 to about 4.30 w is about 0.295 Y is from about 0.147 to about 0.295 y is about 3.0 z is from about 1.72 to about 2.21. An improved two step firing process for producing the disclosed phosphors is described and an improved fluorescent lamp employing the disclosed phosphors is also described.

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