稀土掺杂Ca_(1.995)Ba_(0.005)Zn_4Ti_(15)O_(36):Pr^(3+),Na^+红色荧光粉的合成和敏化发光

摘要

利用溶胶-凝胶法和高温固相法制备了双掺杂的Ca_(1.995)Ba_(0.005)Zn_4Ti_(15)O_(36):Pr^(^(3+)),Na^+发光材料(杂质离子为Sm^(3+),Eu^(3+),Gd^(3+),Tb^(3+),Dy^(3+),Tm^(3+)).实验结果表明溶胶-凝胶法制备的前驱体在1 000℃灼烧24 h,与高温固相法在1 200℃灼烧48 h得到的样品相比,溶胶-凝胶法制备样品的发光性质较好.通过测定样品的激发光谱和发射光谱,发现在Ca_(1.995)Ba_(0.005)Zn_4Ti_(15)O_(36)基质中,Sm^(3+),Eu^(3+),Gd^(3+),Tb^(3+),Dy^(3+)和Tm^(3+)的引入增强了Pr^(3+)的红光发射,其中Eu^(3+)的作用最强.Ca_(1.995)Ba_(0.005)Zn_4Ti_(15)O_(36):0.006 Pr^(3+),0.006Na^+,0.004 Eu^(3+)是一种新型红色长余辉发光材料.