BLUE LUMINESCENT LANTHANUM-GADORINIUM- OXYBROMIDE, FLUORESCENT SCREEN EQUIPPED WITH SAID OXYBROMIDE AND CATHODE RAY TUBE EQUIPPED WITH SAID SCREEN

摘要

Blue-luminescing lanthanum-gadolinium-oxybromide, activated by trivalent cerium, which oxybromide is also activated by trivalent terbium and is defined by the molecular formula La1-x-y-zGdxCeyTbzOBr, in which 0.25 /= x /= 1-y-z, 0.002 /= y /= 0.05, 0.0001 /= z /= 0.005 and y z. v