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CuAl2O4和CuAl2O4:Cr荧光粉的合成及发光机理研究
引用本文: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
作者姓名:班丽萍  马民
作者单位:1.永城职业学院,河南永城 4766002.湖南大学化学化工学院
基金项目:湖南省自然科学基金杰出青年基金(2018JJ1002)。
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。

关 键 词:溶胶-凝胶法  螯合剂  CuAl2O4  荧光粉  
收稿时间:2021-03-18

Study on synthesis and photoluminescence mechanism of CuAl2O4and CuAl2O4:Cr phosphors
BAN Liping,MA Min. Study on synthesis and photoluminescence mechanism of CuAl2O4and CuAl2O4:Cr phosphors[J]. Inorganic Chemicals Industry, 2022, 54(1): 56-61. DOI: 10.19964/j.issn.1006-4990.2021-0162
Authors:BAN Liping  MA Min
Affiliation:1. Yongcheng Vocational College,Yongcheng 476600,China2. Hunan University,College of chemical engineering
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+.
Keywords:sol-gel method  chelating agent  CuAl2O4  phosphor
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