Synthesis and Characterization of SrAl2O4∶Eu2+ ,Dy3+ Long Afterglow Luminescence Materials by Spray Pyrolysis Process

WANG Lin-sheng; LI Min; LAI Hua-sheng; WEN Xiao-qiang; ZHOU Jian; HUANG Ke-long

doi:10.3788/fgxb20113208.0766

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Synthesis and Characterization of SrAl₂O₄∶Eu²⁺ ,Dy³⁺ Long Afterglow Luminescence Materials by Spray Pyrolysis Process

paper | 更新时间：2020-08-12

- Synthesis and Characterization of SrAl₂O₄∶Eu²⁺ ,Dy³⁺ Long Afterglow Luminescence Materials by Spray Pyrolysis Process
- Chinese Journal of Luminescence Vol. 32, Issue 8, Pages: 766-772(2011)
- 作者机构：
  
  1. 江西理工大学材料与化学工程学院,江西赣州,341000
  2. 中南大学化学化工学院,湖南长沙,410083
  3. 赣州有色冶金研究所,江西赣州,341000
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113208.0766
  CLC： O482.31
- Received：27 March 2011，
  
  Revised：23 May 2011，
  
  Published Online：22 August 2011，
  
  Published：22 August 2011
- 稿件说明：
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王林生, 李敏, 赖华生, 文小强, 周健, 黄可龙. SrAl2O4∶Eu2+,Dy3+长余辉发光材料的喷雾热解制备及其表征[J]. 发光学报, 2011,32(8): 766-772

WANG Lin-sheng, LI Min, LAI Hua-sheng, WEN Xiao-qiang, ZHOU Jian, HUANG Ke-long. Synthesis and Characterization of SrAl2O4∶Eu2+ ,Dy3+ Long Afterglow Luminescence Materials by Spray Pyrolysis Process[J]. Chinese Journal of Luminescence, 2011,32(8): 766-772
王林生, 李敏, 赖华生, 文小强, 周健, 黄可龙. SrAl2O4∶Eu2+,Dy3+长余辉发光材料的喷雾热解制备及其表征[J]. 发光学报, 2011,32(8): 766-772 DOI： 10.3788/fgxb20113208.0766.

WANG Lin-sheng, LI Min, LAI Hua-sheng, WEN Xiao-qiang, ZHOU Jian, HUANG Ke-long. Synthesis and Characterization of SrAl2O4∶Eu2+ ,Dy3+ Long Afterglow Luminescence Materials by Spray Pyrolysis Process[J]. Chinese Journal of Luminescence, 2011,32(8): 766-772 DOI： 10.3788/fgxb20113208.0766.

摘要

采用喷雾热解两段法制备了SrAl

∶Eu

长余辉发光材料

并利用XRD、SEM、荧光长余辉亮度测试等方法分析了不同制备工艺条件下SrAl

∶Eu

发光材料的结构、形貌以及发光性能的变化。结果表明:采用喷雾热解两段法可制备出球形SrAl

∶Eu

长余辉发光材料

SrAl

∶Eu

的晶体结构与-SrAl

磷石英晶体结构相同。热解温度、还原温度、添加剂对产物的形貌、粒度分布、发光性能有较大影响。较之高温固相法

喷雾热解法制备的SrAl

∶Eu

具有发光性能好、形貌好、粒度分布窄等优点。

Abstract

The long afterglow luminescence materials of SrAl

∶Eu

was synthesized by a two-step spray pyrolysis process. Structure

morphology and luminous performances of SrAl

∶Eu

were investigated via the technologies of X-ray diffraction

field emission scanning electron microscopy

emission spectra and so on. The results showed that the higher pyrolysis temperature was conductive to formation of SrAl

∶Eu

spherical particle. The initial brightness

afterglow time

emission peak intensity of SrAl

∶Eu

increased with temperature and reached the maximum at 850 ℃.The emission spectrum shape of SrAl

∶Eu

that prepared by different pyrolysis temperatures are similar

with wideband peaked at about 512 nm

corresponding to the emission caused by the typical Eu

5d 4f (4f

5d configuration to the ground state 4f

) transition

it is just difference in relative strength and the peak emission spectrum does not change. The afterglow time was prolonged by adding appropriate amount polyethylene glycol

and it was the longest when the dosage was 0.03 mol/L. Adding citric acid reduced the afterglow time of luminescent materials

and the afterglow performance declined slowly when the content changes from 0.1 g/L to 0.3 g/L. Additivesis was beneficial to formation of luminescent global particles. The liquid drop of disperse and spray showed a better effect when the polymeras can be synthesized by the esterification of polyethylene glycol and citric acid at high temperature. With increasing the reduction temperature

the afterglow properties of SrAl

∶Eu

prepared via spray pyrolysis method increased firstly and then decreased. The best reduction temperature was 1 250 ℃ which was distinct advantage over by solid state method. The SrAl

∶Eu

prepared by spray pyrolysis belongs to the

-SrAl

phosphor crystal structure and it do not affect the crystal structure of SrAl

when a small amount of Eu and Dy introduced into the mixture. The emission spectrum shape of SrAl

∶Eu

of obtained by two methods are similar

both wideband spectrum and the peaks corresponding to the typical 4f5d transition of Eu

were observed at 512

513

516

518 nm

respectively. With the rising of reduction temperature

the emission in the main peak all showed an obvious red shift.The results showed that the synthesis temperature used spray pyrolysis method can be significantly reduced

and the sample received more regular morphology

smaller particle size

narrower particle size distribution and more excellent luminescent properties

comparing with that prepared by solid state method.

关键词

Keywords

references

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