| CuAl2O4和CuAl2O4：Cr荧光粉的合成及发光机理研究 |
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| 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 |
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| 作者姓名： | 班丽萍 马民 |
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| 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 |
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| 基金项目： | 湖南省自然科学基金杰出青年基金(2018JJ1002)。 |
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| 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+中2Eg→4A2g的跃迁。
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| 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 |
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| 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 |
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| Authors: | BAN Liping MA Min |
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| Affiliation: | 1. Yongcheng Vocational College,Yongcheng 476600,China2. Hunan University,College of chemical engineering |
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| 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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| Keywords: | sol-gel method chelating agent CuAl2O4 phosphor |
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