高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (12): 2334.

• 研究论文 • 上一篇    下一篇

β-SiAlON:Eu2+蓝色荧光粉的合成及光谱性能

李友芬,李杰,杨建龙   

  1. 北京化工大学北京市新型高分子材料制备与加工重点实验室, 北京 100029
  • 收稿日期:2010-06-21 修回日期:2010-07-14 出版日期:2010-12-10 发布日期:2010-12-06
  • 通讯作者: 李友芬 E-mail:yfli@mail.buct.edu.cn
  • 作者简介:李友芬, 女, 博士, 副教授, 主要从事功能材料的研究. E-mail: yfli@mail.buct.edu.cn

Synthesis and Photoluminescence of β-SiAlON:Eu2+ Blue Phosphor

LI YouFen*, LI Jie,YANG JianLong   

  1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology,  Beijing 100029, China
  • Received:2010-06-21 Revised:2010-07-14 Online:2010-12-10 Published:2010-12-06
  • Contact: LI YouFen E-mail:yfli@mail.buct.edu.cn
  • About author:李友芬, 女, 博士, 副教授, 主要从事功能材料的研究. E-mail: yfli@mail.buct.edu.cn

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摘要： 以Si，SiO2，AlN和Eu2O3为原料，采用金属热还原法合成了β-SiAlON:Eu2+蓝色荧光粉。利用X射线衍射研究了不同煅烧温度对β-SiAlON:Eu2+组成的影响; 通过荧光分光光度计分析荧光光谱特性。实验结果表明，β-SiAlON:Eu2+发光材料的激发光谱为中心位于290 nm和325 nm的两条宽带，发射光谱位于~485 nm，半峰宽为75 nm，来自Eu2+的5d-4f跃迁，激活剂临界浓度为8%。机理分析表明，Eu2+- Eu2+之间出现能量传递，能量传递的临界距离为1.44 nm；Eu2+占据β-SiAlON晶体中[001]方向管状通道中的空位。

关键词: β-SiAlON, 热还原法, 能量传递, 光致发光

Abstract: Blue β-SiAlON:Eu2+ phosphor was synthesized from Si, SiO2, AlN and Eu2O3 powders by metallothermic reduction-nitridation reaction. The influences of firing temperatures on compositions of β-SiAlON:Eu and photoluminescence were investigated by X-ray diffractometer and fluorescent spectrophotometer, respectively. The results indicate that excitation spectra of β-SiAlON:Eu2+ consists of two broad bands centered at 290 nm and 325 nm, and emission spectrum exhibits a single intense broad emission band at ~ 485 nm with 75 nm of half-peak width, which corresponds to 5d-4f transition of Eu2+. The critical concentration of Eu2+ is 8%. The mechanism analysis suggests that the energy transfer between the Eu-Eu ions occurs and the critical distance is 1.44 nm; Eu2+ occupies the space of tubular channel along [001] direction in the β-SiAlON crystal.

Key words: β-SiAlON, thermal reduction process, energy transfer, photoluminescence

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