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SrAl12O19：Eu2+,Dy3+紫色荧光粉的制备及光谱特性
Preparation and Spectral Properties of SrAl12O19：Eu2+,Dy3+ Violet Fluorescent Powder
- 发光学报 2007年28卷第3期 页码：397-401
- 作者机构：
中南大学, 化学化工学院,湖南 长沙,410083
- 作者简介：
- 基金信息：2005年中南大学大学生创新教育基金资助项目(lz0502)()
DOI：
中图分类号： O482.31收稿日期：2006-06-18，
修回日期：2006-11-24，
纸质出版日期：2007-05-20
- 稿件说明：
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咸德玲, 黄可龙, 李朝建. SrAl<sub>12</sub>O<sub>19</sub>：Eu<sup>2+</sup>,Dy<sup>3+</sup>紫色荧光粉的制备及光谱特性[J]. 发光学报, 2007,28(3): 397-401
XIAN De-ling, HUANG Ke-long, LI Zhao-jian. Preparation and Spectral Properties of SrAl<sub>12</sub>O<sub>19</sub>：Eu<sup>2+</sup>,Dy<sup>3+</sup> Violet Fluorescent Powder[J]. Chinese Journal of Luminescence, 2007,28(3): 397-401
咸德玲, 黄可龙, 李朝建. SrAl<sub>12</sub>O<sub>19</sub>：Eu<sup>2+</sup>,Dy<sup>3+</sup>紫色荧光粉的制备及光谱特性[J]. 发光学报, 2007,28(3): 397-401 DOI：
XIAN De-ling, HUANG Ke-long, LI Zhao-jian. Preparation and Spectral Properties of SrAl<sub>12</sub>O<sub>19</sub>：Eu<sup>2+</sup>,Dy<sup>3+</sup> Violet Fluorescent Powder[J]. Chinese Journal of Luminescence, 2007,28(3): 397-401 DOI：
摘要
以SrCO
3
和Al
2
O
3
为原料
掺杂Eu
2+
和Dy
3+
采用高温固相法制备了SrAl
12
O
19
:Eu
2+
Dy
3+
紫色荧光粉.当基质中n
Sr
:n
Al
=1:12时
改变反应温度
通过X射线衍射图谱分析晶相的转变过程.反应温度分别为1150
1200
1250℃时
改变基质中的锶铝比(n
Sr
:n
Al
=1:6~1:18)
探讨基质组成和反应温度对荧光粉发射光谱的影响.结果发现
随着基质中Al含量的增加和反应温度的升高
发射光谱从490nm蓝移至395nm.当n
Sr
:n
Al
=1:12
反应温度为1250℃时
荧光粉的发光强度最大.该荧光粉无长余辉现象.
Abstract
Strontium aluminates doped with europium and dysprosium have been attracting people's attention for their great stability
high quantum transformation rate and fine luminescence performance. The preparation and spectra properties of yellow-green phosphor SrAl
2
O
4
:Eu
2+
Dy
3+
and blue-green phosphor Sr
4
Al
14
O
25
:Eu
2+
Dy
3+
are commonly researched while those of SrAl
12
O
19
:Eu
2+
Dy
3+
is rarely studied. In this paper
SrAl
12
O
19
:Eu
2+
Dy
3+
violet fluorescent powder was synthesized using SrCO
3
and Al
2
O
3
as raw materials employing high temperature solid-state reaction
whose emission spectrum located at 395nm. The crystal structure was analysised by X-ray diffraction(XRD) when n
Sr
:n
Al
=1:12. The XRD results suggested the characteristic peaks of Sr
4
Al
14
O
25
gradurally decreased while those of SrAl
12
O
19
increased by degrees when reaction temperature rised from 1150℃ to 1250℃. That's to say
the change of reaction temperature brought about the transformation of crystal structure. The excitation and emission spectra were tested by fluorescence spectrophotometer. When the reaction temperature was 1150
1200
1250℃ respectively
the ratio of Sr and Al differed from 1:6 to 1:18 in order to investigate the corporate effect of matrix composing and reaction temperature on spectra properties. According to the binary phase diagram of SrO and Al
2
O
3
the lower of SrO content and the higher of Al
2
O
3
content
the higher of the reaction temperature of corresponding strontium aluminates. With the content of Al in matrix increasing and reaction temperature rising
the transformation of crystal structure might change the crystal field environment
leading to the variety of emission spectra. The emission spectra shifted from 490nm to 395nm. The luminescence intensity of SrAl
12
O
19
:Eu
2+
D
+
t to be the strongest under the condition that n
Sr
:n
Al
=1:12 and reaction temperature was 1 250℃. The decay curve investigation was also tested in fluorescence spectrophotometer
which showed SrAl
12
O
19
:Eu
2+
Dy
3+
has no afterglow performance
which may correspond with the spinel structure of SrAl
12
O
19
. The preparation and spectra properties of SrAl
12
O
19
:Eu
2+
Dy
3+
violet fluorescent powder were studied. The effect of reaction temperature and the matrix composing on crystal structure and emission spectra was investigated. The research may be helpful for correlative workers.
关键词
Keywords
references
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