Blue luminescent material having high luminescence and good reproducibility - is produced by mixing silver-activated, aluminium-coactivated zinc sulphide with thulium-activated lanthanum oxychloride

摘要

Blue luminescent material (I) and produced by mixing a silver-activated, aluminium-coactivated ZnS material with 5-30 wt.% thulium-activated lanthanum oxychloride material. Also claimed are cathode ray tubes contg. (I). The pref. amt. of thulium-activated lanthanum oxychloride is 10-20 wt.%. ADVANTAGE - (I) has high luminescence and gives good reproducibilitlo