Ca2MgSi2O7 :Eu2+绿色发光粉的低温合成及光致发光

章少华; 胡江峰; 周明斌; 王建军; 谢 冰

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Ca₂MgSi₂O₇ :Eu²⁺绿色发光粉的低温合成及光致发光

论文 | 更新时间：2020-08-12

- Ca₂MgSi₂O₇ :Eu²⁺绿色发光粉的低温合成及光致发光
- Preparation and Photoluminescence of Ca₂MgSi₂O₇ : Eu²⁺ Phosphor Powder
- 发光学报 2010年31卷第1期页码：54-58
- 作者机构：
  
  1. 南昌大学材料科学与工程学院,江西南昌,330031
  2. 南昌大学分析测试中心,江西南昌,330029
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： O482.31
- 纸质出版日期：2010-2-20，
  
  网络出版日期：2010-2-20，
  
  收稿日期：2009-5-26，
  
  修回日期：1900-1-2，
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章少华;胡江峰;周明斌;王建军;谢冰. Ca2MgSi2O7 :Eu2+绿色发光粉的低温合成及光致发光[J]. 发光学报, 2010,31(1): 54-58

ZHANG Shao-hua;HU Jiang-feng;ZHOU Ming-bin;WANG Jian-jun;XIE Bing. Preparation and Photoluminescence of Ca2MgSi2O7 : Eu2+ Phosphor Powder[J]. 发光学报, 2010,31(1): 54-58
章少华;胡江峰;周明斌;王建军;谢冰. Ca2MgSi2O7 :Eu2+绿色发光粉的低温合成及光致发光[J]. 发光学报, 2010,31(1): 54-58 DOI：

ZHANG Shao-hua;HU Jiang-feng;ZHOU Ming-bin;WANG Jian-jun;XIE Bing. Preparation and Photoluminescence of Ca2MgSi2O7 : Eu2+ Phosphor Powder[J]. 发光学报, 2010,31(1): 54-58 DOI：

摘要

采用CaCl

作助熔剂同时又作反应物

利用固相法在碳还原气氛下合成了Ca

MgSi

: Eu

发光粉

确定其最佳的合成条件为按CaCO

、Mg(OH)

、SiO

、CaCl

的量的比1.5 : 1 : 2 : 2.4称取原料

烧结温度为900 ℃

烧结时间为3 h。合成的样品可被360~480 nm的光有效激发

得到发射峰值位于529 nm的绿光。该发光粉Eu

的最佳掺杂摩尔分数为0.02。与高温法相比

低温法制备的Ca

MgSi

: Eu

发光粉激发光谱形状表现出一些差别

并且发射光强度显著增强

低温制备的Ca

MgSi

: 0.02Eu

的发射强度是高温制备样品的261%。

Abstract

Alkaline earth silicate Ca

MgSi

: Eu

phosphors were prepared under a reducing atmosphere by solid-state reaction using CaCl

as flux medium and starting materials. Samples sintered under different CaCO

concentration

different temperatures and different time were obtained. The effect of these conditions on the structure was studied by X-ray diffraction (XRD). The synthetic conditions were optimized at the molar ratio of starting materials CaCO

: Mg(OH)

: SiO

: CaCl

equal to 1.5 : 1 : 2 : 2.4

sintering temperature 900 ℃ and sintering time 3 h. The photoluminescence (PL) spectra of the as-prepared phosphor powders were measured. The results indicated that the Ca

MgSi

: Eu

phosphor can be effectively excited by the light in the wavelength range of 360~480 nm and emission spectrum shows a broad green emission band centered at 529 nm with a bright green emission. And it is possible to determine the distribution of this broad emission band in the spectrum associated with transition from the 4f5d level of Eu

ion which only replaces the Ca

ion site with a coordinate number of eight. Furthermore

the broad green emission band is asymmetric as a result of the re-absorption of the blue light by the green-emission light. The Ca

MgSi

∶ Eu

phosphors were also synthesized at 1 200 ℃ for 4 h in a reducing atmosphere using H

as flux medium and CaCO

Mg(OH)

SiO

as starting materials. Comparing the high temperature and low temperature methods

we found that their exitaton spectrum profiles are different

and the emission intensity of Ca

MgSi

∶

(

=0.01

0.02

0.03

0.04

0.07) phosphor prepared at 900 ℃ is higher than that of powders prepared at 1 200 ℃.

关键词

发光粉助熔剂低温合成光致发光

Keywords

phosphor powderflux mediumlow synthetic temperaturePL

references

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