基于相图原理定量预测(Mg1-x-yBaxSry)1.95SiO4:0.05Eu系列荧光粉的结构和发光性能

汪雨; 罗岚; 郭锐; 孙传耀; 高明远

doi:10.3788/fgxb20194012.1494

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基于相图原理定量预测(Mg_1-x-yBa_xSr_y)_1.95SiO₄:0.05Eu系列荧光粉的结构和发光性能

材料合成及性能 | 更新时间：2020-08-12

- 基于相图原理定量预测(Mg_1-x-yBa_xSr_y)_1.95SiO₄:0.05Eu系列荧光粉的结构和发光性能
- Quantitative Prediction of Structure and Luminescent Properties of (Mg_1-x-yBa_xSr_y)_1.95SiO₄: 0.05Eu via Phase Diagram Approach
- 发光学报 2019年40卷第12期页码：1494-1504
- 作者机构：
  
  1. 南昌大学材料科学与工程学院, 江西南昌 330001
  2. 南昌大学江西省轻质高强结构材料重点实验室, 江西南昌 330001
- 作者简介：
- 基金信息：
  
  国家重点研发计划（2016YFB0701201，2016YFB0701203，2017YFB1103701）();国家自然科学基金（11564025，51671101，
- DOI：10.3788/fgxb20194012.1494
  中图分类号： TB332
- 收稿日期：2019-07-03，
  
  修回日期：2019-08-27，
  
  网络出版日期：2019-12-05，
  
  纸质出版日期：2019-12-05
- 稿件说明：
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汪雨, 罗岚, 郭锐等. 基于相图原理定量预测(Mg1-x-yBaxSry)1.95SiO4:0.05Eu系列荧光粉的结构和发光性能[J]. 发光学报, 2019,40(12): 1494-1504

WANG Yu, LUO Lan, GUO Rui etc. Quantitative Prediction of Structure and Luminescent Properties of (Mg1-x-yBaxSry)1.95SiO4: 0.05Eu via Phase Diagram Approach[J]. Chinese Journal of Luminescence, 2019,40(12): 1494-1504
汪雨, 罗岚, 郭锐等. 基于相图原理定量预测(Mg1-x-yBaxSry)1.95SiO4:0.05Eu系列荧光粉的结构和发光性能[J]. 发光学报, 2019,40(12): 1494-1504 DOI： 10.3788/fgxb20194012.1494.

WANG Yu, LUO Lan, GUO Rui etc. Quantitative Prediction of Structure and Luminescent Properties of (Mg1-x-yBaxSry)1.95SiO4: 0.05Eu via Phase Diagram Approach[J]. Chinese Journal of Luminescence, 2019,40(12): 1494-1504 DOI： 10.3788/fgxb20194012.1494.

摘要

为了研究随着三元碱土离子配比变化其正硅酸盐物相组成、发光性能的变化规律，优选高效荧光粉，同时探讨单相区和混合相区发光性能的变化内在机制，建立组分-结构-发光性能关联，本文采用高温固相法制备（Mg

x-y

）

1.95

SiO

:0.05Eu系列荧光粉，共计44个样，分析其二元、三元物相组成和光谱，得出其物相组成和紫外激发发光CIE值。实验表明，（Mg

-x

）

1.95

SiO

:0.05Eu体系中物相组成随着组元含量存在渐变性；富Ba端形成了Ba

SiO

相单相区（Sr最大量含量为35%、Mg为30%），单相区随着Sr

、Mg

固溶，晶格常数减小，结晶度提高。（Mg

1-x-y

）

1.95

SiO

:0.05Eu荧光粉在紫外激发下其颜色和亮度随着组元含量也呈现渐变性，Ba

SiO

相单相区荧光粉均为绿色荧光粉且随着Sr

、Mg

固溶荧光亮度逐渐增大（精细光谱表明单相区内Mg

、Sr

离子有促进Eu

离子进入高发光效率的格位的效果）；Mg

SiO

-Sr

SiO

二元系列为红色荧光粉；单相区外的样品点随着Ba

的减少，荧光粉紫外激发荧光颜色逐渐由绿变红（混合物相中Eu离子配位空间逐渐减小，Eu离子逐渐以Eu

离子形式存在）。（Mg

x-y

）

1.95

SiO

:0.05Eu系列荧光粉的相组成、结构及发光性能随组元呈现渐变性关系，借鉴相图建立方法，可建立三元色像图（由样品发射光谱得出的CIE色像点，基于散点分布建立色像图）；利用三元色像图可系统性优选高效荧光粉（优选出最佳绿色和红色荧光粉样品点为:（Mg

0.3

0.65

0.05

）

1.95

SiO

:0.05Eu和（Mg

0.65

0.35

）

1.95

SiO

:0.05Eu）。

Abstract

In order to study the variation of anosilicate phase composition and luminescence properties with the ternary alkaline ion ratio

high-efficiency phosphors are preferred. The internal mechanism of luminescence properties in single-phase and mixed-phase regions is also discussed and component-structure-luminescence properties are established. (Mg

x-y

)

1.95

SiO

:0.05Eu phosphors were synthesized by high temperature solid-state reaction

a total of 44 samples. By the analysis of binary and ternary powders' phase constitutions and the luminescent spectra

the phases and the ultraviolet excitation luminescence CIE values were obtained. The experimental results showed that the phases of (Mg

x-y

)

1.95

SiO

:0.05Eu is gradually changed with compositions

SiO

-phase region is formed on the Ba-rich corner(the maximum amount of Sr is 35%

and Mg is 30%). The lattices of Ba

SiO

-phase powder decrease and the crystallines increase as the Sr

and Mg

content increasing. (Mg

x-y

)

1.95

SiO

:0.05Eu phosphors also have a gradually changing in photoluminescent color and intensity under the ultraviolet excitation. Ba

SiO

-phase powders are green phosphors and the intensity increases with Sr

or Mg

substitution. High resolution emission spectra indicate that Sr

or Mg

substitution promotes Eu

in taking place of Ba

(I)(the relative higher luminescent efficiency site).The binary series of Mg

SiO

-Sr

SiO

matrix powders activated by Eu ion are red phosphors. The other mixture-phase phosphors would gradually change from green to red as decreasing of Ba content (Eu ion trends to be +3 for coordination space gradually decreaseses). For (Mg

x-y

)

1.95

SiO

:0.05Eu series

relationship both the structure and luminescent properties changes with composition. Profiting from the essence of the phase diagram

a ternary color image could be created

and used to screen the candidates. It should be an efficient and systematic approach to make the phosphor discovering(optimized green and red phosphor sample points are:((Mg

0.3

0.65

0.05

)

1.95

SiO

:0.05Eu and (Mg

0.65

0.35

)

1.95

SiO

:0.05Eu).

关键词

Keywords

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(Mg_1-xSr_x)₂SiO₄:(Eu³⁺,F^-)荧光粉的物相及光谱