无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
研究与开发

CuAl2O4和CuAl2O4:Cr荧光粉的合成及发光机理研究

  • 班丽萍 ,
  • 马民
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  • 1.永城职业学院,河南永城 476600
    2.湖南大学化学化工学院
班丽萍(1978— ),女,硕士,讲师,主要从事化学教学工作;E-mail: w23ck6@163.com

收稿日期: 2021-03-18

  网络出版日期: 2022-03-14

基金资助

湖南省自然科学基金杰出青年基金(2018JJ1002)

Study on synthesis and photoluminescence mechanism of CuAl2O4 and CuAl2O4:Cr phosphors

  • Liping BAN ,
  • Min MA
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  • 1. Yongcheng Vocational College,Yongcheng 476600,China
    2. Hunan University,College of chemical engineering

Received date: 2021-03-18

  Online published: 2022-03-14

摘要

采用温和的溶胶-凝胶法以酒石酸作为螯合剂制备了铝酸铜(CuAl2O4)和CuAl2O4:Cr荧光粉。X射线粉末衍射结果表明,铝酸铜干凝胶在800 ℃烧结获得了纯的立方相的铝酸铜,而CuAl2O4:Cr干凝胶烧结后为铝酸铜和三氧化二铬的混合相。元素组分与电荷态分析表明,铝酸铜和CuAl2O4:Cr荧光粉中不含其他杂质元素,且存在少量的吸附氧。扫描电镜分析表明,铝酸铜和CuAl2O4:Cr荧光粉的颗粒形状近似呈球形,每个大的颗粒由很多细小的晶粒组成,CuAl2O4:Cr荧光粉颗粒间的团聚现象较为明显。光学性质分析发现,CuAl2O4:Cr荧光粉颗粒间明显的团聚现象导致它的光学带隙值比铝酸铜小。采用255 nm的光激发CuAl2O4:Cr荧光粉,在690 nm处获得了一个强的荧光发射峰,主要归因于Cr3+2Eg4A2g的跃迁。

本文引用格式

班丽萍 , 马民 . CuAl2O4和CuAl2O4:Cr荧光粉的合成及发光机理研究[J]. 无机盐工业, 2022 , 54(1) : 56 -61 . DOI: 10.19964/j.issn.1006-4990.2021-0162

Abstract

CuAl2O4 and CuAl2O4:Cr phosphors were prepared by a mild sol-gel method with tartaric acid as chelating agent.The X-ray powder diffraction results showed that the CuAl2O4 xerogel sintered at 800 ℃ exhibited a pure cubic CuAl2O4 phase with high crystallinity,CuAl2O4:Cr phosphor after sintering of xerogels was a mixed phase of CuAl2O4 and Cr2O3.The analysis of elemental composition and charge state showed that the CuAl2O4 and CuAl2O4:Cr phosphors did not contain other impurity elements,and there was a small amount of adsorbed oxygen in the two samples.Scanning electron microscope analysis showed that the particles of CuAl2O4 and CuAl2O4:Cr phosphors were approximately spherical,and each large particle was composed of many fine grains.The agglomeration phenomenon among CuAl2O4:Cr phosphor particles was obvious than that of CuAl2O4.The optical properties analysis found that the agglomeration of CuAl2O4:Cr phosphor particles resulted in a smaller optical band gap than that of CuAl2O4.CuAl2O4:Cr phosphor stimulated at 255 nm,and a strong fluorescence emission peak was obtained at 690 nm,which was mainly attributed to the transition between2Eg and4A2g in Cr3+.

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