摘要 |
A substance used for a fluorescent screen(5) of Braun tube in B/W TV, has characteristics that; (a) it is a compound of fluorescent substance of zinc sulfoselenide, emitting yellow or yellowish green, whose revival quantity of Au and Al is 10-6g to 10-4g and 5x10-7 to 5x10-3g respectively per 1g of zinc sulfoselenide whose formative formula is Zn(S1-a,Sea)(only 0.05<=a<=0.25), and of zinc sulfide, blue, whose revival quantity of Ag is 10-5g to 10-3g per 1g of zinc sulfide, and (b) the weight ratio of the latter to the former is 0.60 to 1.60.
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