Long-lasting phosphor ceramics and manufacturing method thereof

摘要

A method for manufacturing MAl2O4:Eu,RE type long-lasting phosphor ceramics that is capable of producing the ceramics at a reduced raw material cost. In addition, a sintered product of a long-lasting phosphor having no yellow body color. More specifically, the method for manufacturing MAl2O4:Eu,RE type long-lasting phosphor ceramics in which M is an alkaline earth element and RE is a rare earth element other than europium, involving mixing a BAM (alkaline earth aluminate) phosphor, an alkaline earth compound, an aluminum compound and a rare earth compound to form a mixture, and then firing the mixture; and a white MAl2O4:Eu,RE type long-lasting phosphor resulting from the method.

主权项

1. A method for manufacturing a type of long-lasting phosphor ceramics, comprising the steps of:
mixing an alkaline earth aluminate phosphor, an alkaline earth compound, an aluminum compound, and a rare earth compound to form a mixture; and firing the mixture, andwherein the long-lasting phosphor ceramics are represented by the compositional formula (1):
M(1-r-t)Al2O4:Eur,REs,Mnt  (1)wherein M is at least one element selected from the group consisting of Ba, Sr, Mg and Ca; RE is at least one rare earth element other than Eu; r is a number from 0.005 to 0.05; s is a number from 0.005 to 0.05; and t is a number from 0 to 0.08.