长余辉光致发光涂料的研究

以聚丙烯酸酯/聚氨酯基料、发光材料、二甲苯溶剂配制成长余辉光致发光涂料，具有装饰和夜间显示等特殊功能。研究了该发光涂料的最佳配方及生产工艺。讨论了各组分对涂料性能的影响。

长余辉光致发光聚甲基丙烯酸酯共聚物球粒的合成

The acrylic resin round particles with good luminous properties was synthesized with methyl methacrylate and ethyl acrylate monomers and luminous substance as row material.The influence of every reaction condition on the properties of round particles was discussed.

长余辉光致发光涂料的研究

长余辉光致发光涂料是一种蓄能型自发光涂料。它在阳光、灯光、可见光照射下,吸收光能,而在黑暗的条件下将吸收的能量以低频可见光发射出去,由可见光激发而引起的发光现象称为光致发光。光致发光涂料的用途广泛,可用于建筑材料、装潢设计、广告牌、汽车装饰、交通路标、人造景观装饰,也可涂于有机玻璃、PVC板、金属板表面,用作宾馆、商场及特殊场合的发光标志,还可用作低度应急照明。

溶胶-凝胶法制备SrAl_2O_4∶Eu^(2+),Dy^(3+)纳米发光材料

采用溶胶 -凝胶法在低温、还原气氛下制备了SrAl2 O4∶Eu2 + ,Dy3+ 纳米长余辉光致发光材料。XRD分析表明 ,当焙烧温度为 80 0～130 0℃时 ,所合成的样品为SrAl2 O4单斜晶系晶体结构 ,晶格常数为 :a =0 .8442 4nm ,b=0 .882 2nm ,c =0 .5 160 7nm。 110 0℃以上观察到样品长余辉发光。激发光谱与发射光谱分析表明 :发射光谱是峰值位于 5 2 3nm的宽带谱 ,激发光谱是峰值在 2 40 ,330 ,378,42 5nm的连续宽带谱。样品在自然光照射后持续发出明亮的绿光。样品的合成温度从 110 0℃增加到 130 0℃ ,样品的颗粒尺寸不断增大。TEM和电子衍射分析表明 ,110 0℃烧结 4h的SrAl2 O4∶Eu2 + ,Dy3+ 纳米粉末为结晶相 ,粒径为 30～ 40nm。

发光聚合物透水混凝土的制备及性能研究

以天然雨花石、聚氨酯树脂、长余辉光致发光材料等原料制备发光聚合物透水混凝土,采用亮度计、液压式压力机、透水系数仪等测试手段研究了发光聚合物透水混凝土的余辉时间、发光亮度、抗压强度和透水系数。结果表明,选用100目黄绿色长余辉光致发光材料,发光聚合物透水混凝土的发光效果较好;长余辉光致发光材料掺量为15%~20%,反光粉掺量为聚氨酯的8%,可有效增强发光效果且不影响透水效果。

I-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy复合光催化剂的制备及性能研究

为了实现在无光或弱光环境下对有机污染物的降解,采用水解法制备了I-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy复合光催化剂,并以罗丹明B(Rhodamine B,RhB)为目标污染物,进行了光催化降解实验.结果表明,当I-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy复合光催化剂中I-TiO_(2)的质量百分比为30%时,降解率最高:在可见光照射下,3 h内对RhB污染物的降解率达到19.2%;其在无光源环境下,6 h内对RhB污染物的降解率达到31.9%.实验证明,以Sr_(2)MgSi_(2)O_(7):Eu,Dy长余辉荧光粉为载体的新型复合光催化剂,在光照下吸收的光能,成为无光或弱光环境下的新发光源,实现可见光复合光催化剂的无光催化,最终达到全天候24 h催化净化的应用目标.

照明材料

高校Eu^2＋掺杂的氮化物和氮氧化物光转换荧光休白光LED;有机电致发光材料及应用;材料荧光的测量方法;长余辉光致发光涂料的制备及发光性能的研究;助溶剂法合成Ga2O2S：Tb荧光粉;

Preparation of Long Afterglow Photoluminescent Material SrAl_2O_4:Eu^(2+), Dy^(3+) and Its Luminescent Property

Long lasting strontium aluminate phosphors were synthesized by means of coated precipitation in the experiment. SrAl 2O 4 monoclinic phase with long afterglow was synthesized at 1 100 ℃ with the aid of H 3BO 3, and the synthetic temperature decreased about 100 ℃—150 ℃ than in solid state reaction. The process of heat treatment was studied by TG-DTA. The phase compositions of powders were analyzed by XRD. The micrographs of the samples were investigated by SEM and the luminescent properties were researched by optical spectrum. The effects of H 3BO 3 on the phase composition and microstructure of the calcined powders were investigated. The results indicated that H 3BO 3 accelerated the formation of SrAl 2O 4 by consuming the intermediate phase. The addition of Dy 2O 3 stimulated the afterglow property due to the increase in the depth of the trap center in the materials.