Luminescent lead-activated alkaline earth metal rare earth...

Details Luminescent lead-activated alkaline earth metal rare earth... Luminescent lead-activated alkaline earth metal rare earth...

C - Chemistry, Metallurgy

09

K

31/126, 117/22,

C09K 11/77 (2006.01)

Patent

CA 1137294

ABSTRACT: Luminescent-lead-activated alkaline earth metal rare earth metal borates having compositions defined by the formula Me1-PPbpLa1-x-y-yYxCdyDO?. Where Me represents stron- tium and/or calcium,where 0.005 ? P ? 0.30 and 0 ? x ? 0.1, and where 0 ? y ? 0.5 when at least 75 mole% of M? us /ca abd 0 ? y ? 0.1 when less than 75 mole% of Me is Ca. The borate may be used in the lumi- nescent creen of low-preasure mercury vapour discharge lamps.

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