Rapidly excited luminescent material having high luminance and long decay and method therefor

摘要

A luminescent material, represented by the formula: (SrEu)Al204 . Ä(SrEu) . n(A11-a-bB b Q a)203(OH)Ü wherein: Q is at least one selected from Bi, Ca, Mg, Mn, a = 0.0005 to 0.002 b = 0.001 to 0.35, and n = 1 to 7, is characterized by rapid excitation, high luminance and long decay. A method of preparation comprises: acid treating at least one raw material; grinding and mixing well appropriate amounts of the all raw materials; heating the mixture gradually from 400 DEG C up to 1250 DEG C SIMILAR 1600 DEG c over 7 to 10 hours; firing the mixture at 1250 DEG C SIMILAR 1600 DEG c for 3 to 5 hours; cooling it down to 200 DEG C gradually over 7 to 10 hours and pulverizing and sieving the sintered material, wherein heating, firing and cooling are all conducted in a reducing atmosphere.