Preparation and Fluorescent Properties of Lithium Rare Earth Phosphate Phosphors

Efficient emission has been found in the phosphate phosphors, and under u.v. excitation. For the preparation of these phosphors, an appropriate firing temperature must be selected in regard to the ionic radius of rare earth ions. The luminescence intensity changes little over the wide range of activator concentration, The rare earth metaphosphate phosphors such as and were found to show similar properties. Under vacuum u.v. excitation by Xe lamp, the brightness of exceeds that of . The enhancement of Tb 3+ emission by Ce 3+ ions was found in both and .