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2222材料工程  2018, Vol. 46 Issue (8): 51-56    DOI: 10.11868/j.issn.1001-4381.2016.001243
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
K2SiF6:Mn4+发光粉的合成及性能研究
何清洋1, 朱月华2, 卓宁泽2, 王海波2,*()
1 南京工业大学 材料科学与工程学院, 南京 210009
2 南京工业大学 电光源材料研究所, 南京 210015
Study on Synthesis and Properties of K2SiF6: Mn4+ Phosphor
Qing-yang HE1, Yue-hua ZHU2, Ning-ze ZHUO2, Hai-bo WANG2,*()
1 College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
2 Research Institute of Electric Light Source Materials, Nanjing Tech University, Nanjing 210015, China
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摘要 

采用高效离子交换法制备K2SiF6:Mn4+荧光粉,研究不同K/Mn原料摩尔比和不同反应时间对K2SiF6:Mn4+荧光粉结构及性能的影响,并采用溶胶-凝胶法对制备的K2SiF6:Mn4+荧光粉表面包覆SiO2来提高K2SiF6:Mn4+荧光粉的热稳定性。通过XRD,SEM,EDS,PL等方法对样品结构、表面形貌、元素组成和发光性能进行测试和分析。结果表明:当K与Mn原料摩尔比为43:38,反应8h制备的K2SiF6:Mn4+荧光粉样品具有立方晶系结构并且发光性能最优,在460nm的蓝光激发下,最强窄带发射峰位于630nm处(2Eg4A2)。包覆后的K2SiF6:Mn4+红色荧光粉的表面上包覆了一层无定形的SiO2,晶体结构没有改变。包覆前后荧光粉的发光性能测试结果表明包覆SiO2的K2SiF6:Mn4+样品的热稳定性得到改善。

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何清洋
朱月华
卓宁泽
王海波
关键词 K2SiF6:Mn4+K/Mn红色荧光粉结构与性能SiO2包覆    
Abstract

K2SiF6:Mn4+ phosphor was prepared by wet chemical etching, and the effect of the raw material molar ratio of K/Mn of different materials and different reaction time on the structure and properties of phosphor was studied, the surface of K2SiF6:Mn4+ was coated with SiO2 to improve the thermal stability of K2SiF6:Mn4+ phosphor by sol-gel method. The structure, morphology, excitation spectrum and emission spectrum of phosphor powder were characterized by X-ray diffraction, scanning electron microscope and fluorescence spectrometer. The results show that the change of K/Mn ratio does not change the crystal structure of K2SiF6:Mn4+, the sample has cubic structure. At 460nm excitation, the strongest narrowband emission peak is located at 630nm (2Eg4A2). The crystal structure of K2SiF6:Mn4+ phosphor coated with SiO2 has not been changed. The results show that the thermal stability of the K2SiF6:Mn4+ phosphor coated with SiO2 is improved.

Key wordsK2SiF6:Mn4+    K/Mn    red phosphor    structure and property    SiO2 coating
收稿日期: 2016-10-15      出版日期: 2018-08-17
中图分类号:  TQ137  
基金资助:国家重点研发计划资助项目(2016YFB0400600);国家重点研发计划资助项目(2016YFB0400605);江苏省科技成果转化项目(BA2014073);科技部2014年科研院所专项(2014EG111223)
通讯作者: 王海波     E-mail: wanghaibo88@163.com
作者简介: 王海波(1963-), 男, 教授, 硕士, 从事专业:稀土发光材料, 联系地址:江苏省南京市鼓楼区金川门外5号(210015), E-mail:wanghaibo88@163.com
引用本文:   
何清洋, 朱月华, 卓宁泽, 王海波. K2SiF6:Mn4+发光粉的合成及性能研究[J]. 材料工程, 2018, 46(8): 51-56.
Qing-yang HE, Yue-hua ZHU, Ning-ze ZHUO, Hai-bo WANG. Study on Synthesis and Properties of K2SiF6: Mn4+ Phosphor. Journal of Materials Engineering, 2018, 46(8): 51-56.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001243      或      http://jme.biam.ac.cn/CN/Y2018/V46/I8/51
Fig.1  K与Mn原料摩尔比43: 38时不同反应时间下合成的K2SiF6:Mn4+样品XRD图
Fig.2  反应时间8h,K与Mn原料摩尔比为40: 38, 41: 38, 43: 38和45: 38的K2SiF6:Mn4+样品的发射光谱图
Fig.3  发光粉的SEM图
(a)K2SiF6:Mn4+发光粉; (b)SiO2包覆的K2SiF6:Mn4+发光粉
Fig.4  发光粉的EDS图
(a)K2SiF6:Mn4+发光粉;(b)SiO2包覆的K2SiF6:Mn4+发光粉
Fig.5  发光粉的XRD图
Fig.6  K2SiF6:Mn4+的XRD衍射图
Fig.7  SiO2@K2SiF6:Mn4+相对亮度随灼烧时间的变化
Fig.8  样品的色坐标图
(a)热处理前后的K2SiF6:Mn4+样品的色坐标;(b)热处理前后的SiO2@K2SiF6:Mn4+样品的色坐标
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