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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

碱土铝酸盐长余辉发光颜料表面包膜的研究

吕兴栋; 舒万艮; 谭爱东; 周文华   

  1. 中南大学化学化工学院 长沙 410083
  • 收稿日期:2003-10-08 修回日期:2003-11-24 出版日期:2004-11-20 网络出版日期:2004-11-20

Encapsulation Study of Persistent Luminescent Pigment of Alkaline Earth Aluminate

LU Xing-Dong; SHU Wan-Gen; TAN Ai-Dong; ZHOU Wen-Hua   

  1. Chemistry and Chemical College of Central-south University; Changsha 410083; China
  • Received:2003-10-08 Revised:2003-11-24 Published:2004-11-20 Online:2004-11-20

PDF (PC)

1674

被引次数

56

摘要： 采用四乙氧基硅(TEOS)为硅包膜剂,在SrAl2O4:Eu2+,Dy3+发光颜料颗粒表面进行包膜,通过扫描电镜(SEM)、粒度测量、BET比表面积测试及X射线光电子能谱(XPS)分析,证实发光颜料颗粒表面包覆了一层厚度约为14nm的致密均匀的SiO2纳米膜.耐水性能及发光性能测试表明,包膜后发光颜料耐水性明显改善,发光性能变化较小.分析表明包膜过程实际上是水合二氧化硅在颜料颗粒表面的溶胶-凝胶过程,其最佳工艺条件为:包膜溶液pH约为10;包膜温度控制在80℃;包膜时间为3.0h.

关键词: 发光颜料, 包膜, 溶胶-凝胶, 铝酸盐

Abstract: Silica encapsulation was studied on the particle surface of aluminate-based luminescent pigment by using TEOS as
the raw materials. The encapsulated particles were analyzed by SEM, diameter testing, BET surface area measurement and XPS, a dense SiO2 film formed
on particle surface with the thickness of 14nm. The anti-water property and luminescent characteristics measurement show
that encapsulated particles have a better anti-water performance and similar luminescent properties to non-encapsulated particles. Moreover, the
encapsulation procedure was analyzed and the process parameters’ effect on coating film was also researched. The results show that the encapsulation
procedure is actually a kind of sol-gel procedure of SiO2·nH2O on the surface of particles and its process is optimized as following: pH
of encapsulation solvent is about 10, encapsulation temperature is at 80℃ and reaction time is about 3.0.

Key words: luminescent pigment, encapsulation, sol-gel, aluminate

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