Praseodymium-doped luminescent compositions

摘要

Phosphorescent compositions of the formula PrxSrM1-xAlO4, wherein M is lanthanum or gadolinium and x is in the range of about 0.025-0.075, are prepared by the reaction of appropriate proportions of aluminum nitrate, strontium carbonate, gadolinium(III) oxide or lanthanum(III) oxide and a praseodymium oxide. They emit light in the red and green regions of the visible spectrum.