Ca_(12)Al_(14)O_(33):Eu^(2+)和Ca_(12)Al_(14)O_(33):Eu^(2+),Re^(3+)(Re=Dy,La,Nd)长余辉发光粉的燃烧合成及其发光性能

Combustion Synthesis and Luminescence Properties of Ca_(12)Al_(14)O_(33):Eu^(2+) and Ca_(12)Al_(14)O_(33):Eu^(2+),Re^(3+)(Re=Dy,La,Nd)Long Afterglow Phosphors

采用燃烧法制备出Ca12Al14O33:Eu2+和Ca12Al14O33:Eu2+,Re3+(Re=Dy,La,Nd)靛蓝光长余辉发光粉。分别利用XRD和FE-SEM对产物的物相结构和形貌进行了表征,用光致发光测试(PL)和余辉衰减曲线对样品的发光性能进行了分析。结果表明上述长余辉发光粉的晶体结构属于体心立方相七铝酸十二钙;所制备的Ca12Al14O33:Eu2+、Ca12Al14O33:Eu2+,Dy3+、Ca12Al14O33:Eu2+,La3+和Ca12Al14O33:Eu2+,Nd3+长余辉发光粉的发射光谱均呈宽发射谱带,波长范围为390~530nm,发光峰值也均位于443nm;产物在紫外线或紫色光激发后发射靛蓝光;余辉时间分别为238,184,168和9 120s。

Indigo-emitting Ca12Al14O33：Eu^2＋ and Ca12Al14O33：Eu^2＋,Re^3＋（Re=Dy,La,Nd） long afterglow phosphors were synthesized by the combustion method. The phase formation and morphology of the products were characterized by XRD and FE-SEM, re- spectively, and the luminescent properties of the samples were investigated by using the photoluminescence （PL） and the afterglow decay curves. The crystal structure of the above long afterglow phosphors belongs to Ca12Al14O33 with body-centered cubic struc- ture, and their emission spectra are all broad-band from 390 to 530 nm, and their emission peaks are all at 443 nm, and these samples emit indigo light after being excited by ultraviolet or purple light. The duration time of Ca12Al14O33：Eu^＋、Ca12Al14O33：Eu^2＋,Dy^3＋、Ca12Al14O33：Eu^2＋,La^3＋ and Ca12Al14O33：Eu^2＋,Nd^3＋ is 238, 184, 168 and 9 120 s, respectively.