LiAl_5O_8:Fe荧光粉的研究与应用

目前市售硼酸镉、钒酸钇和砷酸盐等灯用红色荧光粉,发射波长一般在610nm左右,呈桃红色。砷酸盐荧光粉掺红颜料,因而看到的是颜料的颜色,砷酸盐还有毒。因此,研制一种发射波长长,原料无毒的大红单色荧光粉有着重要的意义。关于金属离子Mn~(2+)、Cr~(3+)、Co~(2+)和Ni~(2+)在LiAl_5O_8中的发光特性已有研究。本文报导激活剂Fe~(3+)离子浓度和烧结温度对Fe~(3+)在LiAl_5O_8中发光性质的影响,并对该荧光粉的发光机制和效率等进行讨论。

STUDY ON PHOSPHORS FROM LiAl_5O_8:Fe POWDER

In this paper the synthesis and characteristic properties of LiAl_5O_8:Fe flourescence powder are reported. The effects of concentration of excited ion Fe~(3+) and sintering temperature on flourescence intensity have been investigated and the optimum conditions for LiAl_5O_8:Fe powder preparation were estabilished. The strongest flourescence peak of phosphors is at 670nm, The powder can be applied to colored and agricutural lamp production.