Use as phosphor of a rare earth phosphate compound for plasma systems

摘要

The use of a rare earth (Tb, Pr, Eu or Ce) doped yttrium, lanthanum, gadolinium or lutetium phosphate-based cpd., as a phosphor in plasma systems, is new. Pref. the phosphate is selected from LnPO4, LnP3O9 and LnP5O14, where Ln = Y, Gd, Lu or esp. La.