关于 (Ca,Sr) -Al-O复合光材料的结构-发光关系和防伪应用的研究
Jianhui Lv1, Jigang Wang1, Yuansheng Qi1
1Beijing Key Laboratory of Printing and Packaging Materials and Technology, Beijing Institute of Graphic Communication, Beijing 102600, China.
Nanomaterials (Basel, Switzerland)
|September 26, 2025
概括
使用 (Ca,Sr) -Al-O系统的新型复合提供长时间的发光和双模式的防伪. 这种材料可以打印高分辨率的QR码,用于增强安全性应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低的.
背景情况:
- 传统的单相氨酸 (SrAl2O4) 在载体储存和释放效率方面存在局限性.
- 开发具有增强性能的先进发光材料对于防伪技术至关重要.
研究的目的:
- 合成一种基于 (Ca,Sr) -Al-O系统的新型长效发光复合材料.
- 研究复合结构和协同兴奋剂对发光和防伪性能的影响.
- 开发用于安全应用的高分辨率QR码光墨水.
主要方法:
- 一种 (Ca,Sr) -Al-O复合材料的溶液燃烧合成,其中 (Ca,Sr) 3Al2O6作为初级阶段,SrAl2O4作为次级阶段.
- 与Eu2+和Nd3+的协同兴奋剂来控制陷深度和数量.
- 发光性质的表征,光照后寿命,以及双模式的防伪行为.
- 准备丝网印刷油墨和高分辨率QR码打印.
主要成果:
- 合成的复合具有较长的光后寿命,在365nm激发下超过30秒.
- 观察到~515nm的Eu2+排放和Nd3+作为有效的陷中心.
- 证明了优秀的双模式防伪性能:长时间的绿色发射 (365nm激发) 和短暂的蓝紫色发射 (254nm激发).
- 高分辨率的QR码成功地使用光素配制的丝网印刷油墨打印出来,使图案识别和代码验证成为可能.
结论:
- (Ca,Sr) 3Al2O6和SrAl2O4的复合结构,再加上Eu2+ + Nd3+的兴奋剂,显著提高了载体的储存和释放效率,从而提高了后发光性能.
- 该材料提供了有前途的双模式防伪功能,适合高安全性应用.
- 高分辨率QR码光墨水的开发表明了这种复合的实用潜力在防伪技术中.
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