无机化学学报

SrAl₂O₄∶Eu²⁺，Dy³⁺纳米长余辉发光材料的制备与表征

Preparation and Charaterization of Long-lasting Phosphorescence SrAl₂O₄∶Eu²⁺, Dy³⁺ Nanoparticles

作者	单位
张希艳	长春理工大学材料与化工学院，长春 130022
姜薇薇	长春理工大学材料与化工学院，长春 130022
卢利平	长春理工大学材料与化工学院，长春 130022
刘全生	长春理工大学材料与化工学院，长春 130022
柏朝晖	长春理工大学材料与化工学院，长春 130022
王晓春	长春理工大学材料与化工学院，长春 130022
曹志峰	长春理工大学材料与化工学院，长春 130022

摘要: 采用溶胶-凝胶法制备了SrAl₂O₄∶Eu²⁺，Dy³⁺ 纳米长余辉发光材料，研究了pH值、反应温度和络合剂等对溶胶-凝胶形成的影响，研究了灼烧温度对SrAl₂O₄∶Eu²⁺，Dy³⁺ 晶相、颗粒尺度和发光性能的影响。利用XRD, SEM，光谱分析等手段对产物进行了结构和性能分析。实验结果表明，在800 ℃时SrAl₂O₄晶相开始形成但没有发光，而在1 100 ℃烧结的样品则具有很好的发光性能。样品平均晶粒尺寸随灼烧温度升高而增加，平均晶粒尺寸为20～40 nm。样品的激发光谱是峰值在240，330，378和425 nm的连续宽带谱，发光光谱是峰值在523nm的宽带谱，与SrAl₂O₄∶Eu²⁺，Dy³⁺ 粗晶材料相比，发光光谱发生了“红移”现象。样品的热释光峰值位于157 ℃，与SrAl₂O₄∶Eu²⁺，Dy³⁺ 粗晶材料相比，峰值向低温移动了13℃。

关键词: SrAl₂O₄∶Eu²⁺，Dy³⁺ 纳米粉体溶胶-凝胶法长余辉发光

基金项目:

Abstract: Long persistent phosphorescence SrAl₂O₄∶Eu²⁺,Dy³⁺ nanoparticles were synthesized through Sol-Gel method under a reducing atmosphere at lower temperature. The influences of pH value, reaction temperature and complexing agents, etc. on Sol-Gel process were studied. Effects of calcination temperatures on the crystalline phases, size and phosphorescence properties of SrAl₂O₄∶Eu²⁺,Dy³⁺ were also studied. The structure and properties of products were analyzed by XRD, SEM, Excitation spectrum, Emission spectrum and thermal-luminescence spectroscopy. The SrAl₂O₄ crystalline phase was initially formed at 800 ℃. The SrAl₂O₄∶Eu²⁺,Dy³⁺ nanoparticles with bright phosphorescence property were formed at 1 100 ℃. The particles size was about 20～40 nm. Both the peaks of the excitation spectrum at 240, 330, 378, 425 nm and the peak of emission spectrum at 523nm were shift to red wavelength compared with the SrAl₂O₄∶Eu²⁺,Dy³⁺ coarse crystals.

Keywords: SrAl₂O₄∶ Eu²⁺,Dy³⁺ nanoparticle sol-gel method long lasting phosphorescence

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张希艳,姜薇薇,卢利平,刘全生,柏朝晖,王晓春,曹志峰.SrAl₂O₄∶Eu²⁺，Dy³⁺纳米长余辉发光材料的制备与表征[J].无机化学学报,2004,20(12):1397-1401.

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