Effect of Fluxes on Morphology and Luminescent Properties of Ba2SiO4∶Eu2+ Green Phosphor

LI Xue-jing; LIANG Yu-jun; YANG Fan; XIA Zhang-gen; LI Yun-li; HUANG Wen-zhu

doi:10.3788/fgxb20123308.0817

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Effect of Fluxes on Morphology and Luminescent Properties of Ba₂SiO₄∶Eu²⁺ Green Phosphor

更新时间：2020-08-12

- Effect of Fluxes on Morphology and Luminescent Properties of Ba₂SiO₄∶Eu²⁺ Green Phosphor
- Chinese Journal of Luminescence Vol. 33, Issue 8, Pages: 817-823(2012)
- 作者机构：
  
  中国地质大学(武汉) 材料与化学学院, 湖北武汉 430074
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123308.0817
  CLC： O482.31
- Received：25 April 2012，
  
  Revised：02 June 2012，
  
  Published：10 August 2012
- 稿件说明：
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李雪静, 梁玉军, 杨帆, 夏章艮, 李云丽, 黄文珠. 助熔剂对绿色荧光粉Ba2 SiO4∶Eu2+ 颗粒形貌及发光性能的影响[J]. 发光学报, 2012,33(8): 817-823

LI Xue-jing, LIANG Yu-jun, YANG Fan, XIA Zhang-gen, LI Yun-li, HUANG Wen-zhu. Effect of Fluxes on Morphology and Luminescent Properties of Ba2SiO4∶Eu2+ Green Phosphor[J]. Chinese Journal of Luminescence, 2012,33(8): 817-823
李雪静, 梁玉军, 杨帆, 夏章艮, 李云丽, 黄文珠. 助熔剂对绿色荧光粉Ba2 SiO4∶Eu2+ 颗粒形貌及发光性能的影响[J]. 发光学报, 2012,33(8): 817-823 DOI： 10.3788/fgxb20123308.0817.

LI Xue-jing, LIANG Yu-jun, YANG Fan, XIA Zhang-gen, LI Yun-li, HUANG Wen-zhu. Effect of Fluxes on Morphology and Luminescent Properties of Ba2SiO4∶Eu2+ Green Phosphor[J]. Chinese Journal of Luminescence, 2012,33(8): 817-823 DOI： 10.3788/fgxb20123308.0817.

摘要

采用高温固相法在弱还原气氛下合成了Ba

SiO

∶Eu

绿色荧光粉

利用X射线衍射、扫描电子显微镜和荧光分光光度计考察了不同助熔剂对Ba

SiO

∶Eu

荧光粉的结晶度、物相纯度、颗粒形貌和发光强度的影响

并详细讨论了不同助熔剂在荧光粉制备过程中的作用机理。结果表明:不加助熔剂时样品存在BaSi

和SiO

杂相;利用NH

F、Na

或H

作为助熔剂时会抑制BaSi

杂相的形成

而BaF

作助熔剂可以得到纯的斜方晶系。与未加助熔剂合成的荧光粉相比

添加质量分数为2% 的BaF

、NH

F或Na

后合成样品的发光强度分别提高了138%

81%和34%;而质量分数为2%的H

作助熔剂时

荧光粉的发光强度反而降低了14%。BaF

作助熔剂合成的荧光粉颗粒形貌接近球形

以NH

F、Na

或H

作助熔剂合成的荧光粉颗粒形貌分别为不规则片状、纺锤体形和不规则多边形大颗粒。

Abstract

A series of Ba

SiO

∶Eu

green phosphors have been synthesized by high temperature solid state method. The effects of different fluxes on the crystal structure

surface morphology and spectral characteristics of Ba

SiO

∶Eu

phosphors were systematically investigated by X-ray powder diffraction (XRD)

scanning electron microscopy (SEM) and fluorescence spectrophotometer. The function mechanism of different fluxes on the preparation of Ba

SiO

∶Eu

phosphors have also been discussed. XRD results show that the Ba

SiO

∶Eu

phosphor without flux has the impurity phase of BaSi

and SiO

during firing

while fritted with NH

or H

flux

the impurity phase of BaSi

can be suppressed. BaF

flux can get the pure orthorhombic. By comparing the influence of different fluxes on the emission of Eu

it was found that the emission intensity of the Ba

SiO

∶Eu

phosphor with 2% mass fraction of BaF

F or Na

flux improved by 138%

81%

34% than that of the powder without the flux material

while the luminescent intensity reduced 14% when using 2% mass fraction of H

as flux. The phosphor powders were spherical-like shapes using BaF

as the flux

while the phosphor powder prepared with NH

or H

as flux had the irregular laminated structure

spindle shape and irregular polygon

respectively.

关键词

Keywords

references

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Related Institution

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