The influence of chroma is investigated on physical compound of long - persistent red phosphor and strontium aluminate phosphors doped with eu2 + is investigated . lt is found that the long - persistent white phosphor can be acquired when red phosphor and strontium aluminate phosphors are mixed with molar proportion of 100 : 20 研究了红色磷光体与掺eu铝酸盐磷光体的物理复合及对色度的影响，实验发现红色磷光体与铝酸盐磷光体按100 ： 20比例混配可获得接近白色长余辉磷光体。
